Department of Transport
Coastal Sediment Cells for the Vlamingh Coast Between Cape Naturaliste and Moore River, Western Australia Report Number: M2012 (60001) Version: 1 Date: September 2015 Recommended citation Stul T, Gozzard JR, Eliot IG and Eliot MJ (2015) Coastal Sediment Cells for the Vlamingh Region between Cape Naturaliste and Moore River, Western Australia. Report prepared by Seashore Engineering Pty Ltd and Geological Survey of Western Australia for the Western Australian Department of Transport, Fremantle.
The custodian of the digital dataset is the Department of Transport.
Photographs used are from WACoast34.
The Department of Transport acknowledges Bob Gozzard from Geological Survey of Western Australia for providing the images.
Geological Survey of Seashore Engineering Western Australia
2 Executive summary
The aim of this report is to identify a hierarchy of sediment cells to assist planning, management, engineering, science and governance of the Vlamingh coast.
Sediment cells are spatially discrete areas of the coast within which marine and terrestrial landforms are likely to be connected through processes of sediment exchange, often described using sediment budgets. They include areas of sediment supply (sources), sediment loss (sinks), and the sediment transport processes linking them (pathways). Sediment transport pathways include both alongshore and cross-shore processes, and therefore cells are best represented in two-dimensions. They are natural management units with a physical basis and commonly cross jurisdictional boundaries.
Sediment cells provide a summary of coastal data in a simple format and can be used to: 1. Identify the spatial context for coastal evaluations; 2. Provide a visual framework for communicating about the coast with people of any background; 3. Support coastal management decision-making; 4. Support a range of technical uses largely relating to coastal stability assessment, such as interpreting historic trends, understanding contemporary processes and basis for projection of potential future coastal change; and 5. Reduce problems caused by selection of arbitrary or jurisdictional boundaries.
Boundaries of sediment cells have been identified for the Vlamingh coast between Cape Naturaliste and Moore River (Guilderton) in Western Australia. The region also extends along the Garden Island Ridge, including Garden Island and Rottnest Island. Nine primary cells, 40 secondary cells and 81 tertiary cells were identified between Cape Naturaliste and Moore River. Ten of the secondary cells and 21 of the tertiary cells are located on the Garden Island Ridge. The cell hierarchy for the Vlamingh coast is presented as maps and tables in this report, and in electronic datasets available from the Department of Transport. They were defined in three steps through selection of: 1. Points along the shoreline (beachface); 2. Offshore and onshore boundaries; and 3. Alongshore boundaries connecting the beachface points to the offshore and onshore boundaries. This focuses on boundary definition at the beachface where the highest rates of sediment transport are likely to occur.
The cells have been mapped as a hierarchy of primary, secondary and tertiary levels to incorporate three space and time (spatio-temporal) scales. This hierarchical representation of cells gives a basis for implementation of integrated planning and management at a number of scales, from small-scale engineering works, through to large-scale natural resource management. • Primary cells are related to large landforms, and are most relevant to potential change in large landform assemblages or land systems over longer coastal management timescales of more than 50 years. • Secondary cells incorporate contemporary sediment movement on the shoreface and potential landform responses to inter-decadal changes in coastal processes. • Tertiary cells are defined by the reworking and movement of sediment in the nearshore and are most relevant for seasonal to inter-annual changes to the beachface.
Common use of cells is intended to facilitate better integration of coastal management decision-making between governance, science and engineering at a regional and local level.
3 Contents Executive summary...... 3 Introduction...... 5 What are sediment cells?...... 5 Why use sediment cells?...... 6 The Vlamingh coast...... 12 Methods for the definition of sediment cells...... 13 Information used to define the cells...... 13 Cell boundaries...... 15 Primary cells: geologic framework and long-term change in morphology...... 18 Secondary cells: regional-scale processes and morphology...... 19 Tertiary cells: local-scale, short-term processes and morphology...... 20 Rivers, streams and drains...... 21 Cell labels...... 21 Sediment cell results along the Vlamingh coast...... 22 Cell boundaries...... 22 Along coast variation of sediment cells...... 28 Applications...... 30 Context...... 30 Communication...... 31 Decision-making...... 31 Technical use...... 32 Modification of cell boundaries...... 33 Sediment cell connectivity...... 33 Proximity to cell boundaries...... 33 Modification due to engineering works...... 33 Detailed evaluation of coastal behaviour...... 34 References...... 35
Appendix A: Figures of secondary and tertiary cells (Figure A.1 – Figure A.18) Appendix B: Data sources used for determining cell boundaries Appendix C: Comparison of criteria for mapping cells with the Mid-West and Pilbara Regions Appendix D: Tables of attributes for beachface points and cell boundaries
Figure 1: Vlamingh Region coast from Cape Naturaliste to Moore River Figure 2: Primary cells for the Vlamingh Region Figure 3: Secondary cells for the Vlamingh Region Figure 4: Components of a coastal sediment cell Figure 5: Cell boundaries - example for R06B7 Figure 6: Use of sediment cells for problem scaling
Table 1: Criteria for mapping alongshore boundaries in the Vlamingh Region Table 2: Criteria for mapping onshore and offshore boundaries in the Vlamingh Region Table 3: Location of cell results for the Vlamingh Region Table 4: Primary, secondary and tertiary sediment cells of the Vlamingh Region Table 5: Sediment cell alongshore boundaries of the Vlamingh Region Table 6: Number of sediment cells and boundaries of the Vlamingh Region Table 7: Alongshore boundary characteristics of the Vlamingh Region Table 8: Some applications of sediment cells
4 Introduction
This report presents a hierarchy of sediment cells along the Vlamingh Coast for application in engineering, science, planning, management and governance of the region. Sediment cell boundaries were mapped and identified at three spatio-temporal scales, along approximately 350km of the Western Australian coast between Cape Naturaliste and the Moore River. The area includes the inner continental shelf and coastal lands of the Vlamingh Region in the southern Swan Coastal Plain, including Garden Island and Rottnest Island (Figure 1; Figure 2; Figure 3; Appendix A). The three scales range from small, local landforms and the day-to-day processes affecting them to large coastal systems changing over millennia in response to global processes. At each scale the cells identify boundaries within which to consider the potential implications of proposed coastal engineering works as well as for assessment of coastal planning and management practices. The hierarchy of cells facilitates understanding of contemporary sediment movement, encourages projection of future coastal change at a conceptual level, and establishes a context for qualitative investigations. Additionally, the hierarchy is intended to assist identification of differences in the processes driving coastal change at each scale.
Cells within this report are labelled according to a system described in Cell labels.
What are sediment cells? Sediment cells are spatially discrete areas of the coast within which marine and terrestrial landforms are likely to be connected through processes of sediment exchange, often described using sediment budgets. Each includes areas of sediment supply (sources), loss (sinks), and areas through which sediment is moved between sources and sinks (pathways)1. These components are illustrated in Figure 4 for all levels in the hierarchy. Cells are natural management units with a physical basis and commonly cross jurisdictional boundaries.
Box 1: Literature on sediment cells Sediment cells are spatially discrete areas of the coast within which marine and terrestrial landforms are likely to be connected through processes of sediment exchange, often described using sediment budgets. Extensive global literature related to sediment cells and sediment budgets is available and has previously been reviewed2,3,4,5,6,7,8. The literature includes a number of terms similar in meaning to coastal sediment cell, with slight disparities in their use, although the broad concepts underpinning cell identification and sediment budget estimation are well established6.
Alternative terms for coastal sediment cell at varied spatial scales are littoral cell1,9, coastal compartment10, coastal sector11, beach compartment or coastal segment12, sediment cell with smaller coastal process units or sub-cells13, coastal cell14, process defined management unit or coastal management unit15,4, coastal tract5 and three nested systems of coastal behaviour systems , shoreline behaviour units and geomorphic units16. The term sediment cell is used in this report for the Vlamingh Region.
Sediment cells are commonly identified as self-contained where little or no sediment movement occurs across cell boundaries16,8. This concept is most applicable at a broad scale, such as when defining the scale and limits of coastal investigations5. Restriction of sediment movement is not a fundamental characteristic of cells at a fine scale or those not markedly compartmentalised by extensive rocky headlands. The cell approach retains meaning for these coasts, although their cells may have substantial sediment exchange across their boundaries2,17. Constraints to sediment transport vary over time for different spatial scales and types of cell boundaries. For example, some rocky headlands are bypassed under infrequent high-energy conditions, but are a major constraint to sediment transport on a seasonal basis. Similarly, on sandy coasts cell boundaries may correspond to ephemeral areas of sediment transport convergence which indicate zones of reduced transport18,19. This variability in sediment bypassing at boundaries prompts the incorporation of time- dependence between levels within a cell hierarchy10, with the boundaries of the larger (primary) cells being related to longer-term processes.
5 Cell boundaries defined in this document extend landward from points on the shoreline to include terrestrial landforms, and seaward to encompass the nearshore marine environment in which waves and currents are most active. The offshore and onshore boundaries of cells should be determined by the scale of sediment transport processes operating within a cell, as well as by topographic features. Why use sediment cells? Sediment cells define natural units with each cell encompassing adjoining marine and terrestrial environments. The cells thereby provide a base for integrated coastal management in which the components of each cell is considered holistically as an interactive system. In this context sediment cells aid interpretation of historic trends, add to an understanding of contemporary processes and provide an important basis for projection of future coastal change. The objectives of determining a three-scale hierarchy of cells were to: • Identify sediment cells which are recognisable as natural management units for regional, sub-regional and local scale coastal studies; • Establish a framework for linking marine and terrestrial projects that is founded on the connectivity of subaqueous and submarine coastal landforms, and which supports integrated coastal planning and management; • Identify areas of coast where sediment budget estimates may provide a useful tool for coastal planning and management based on landforms at varying time and space scales20,21,22; and • Avoid clashes of policy and practice where coastal management is required by neighbouring coastal agencies, particularly local government authorities, within single or adjacent cells.
Characteristics of the sediment cell approach which make it a fundamental tool for assessment of hazards to land use caused by coastal change are that23: • There is a plausible connectivity of geology, landform and hydrodynamics for coastal evolution and change that can be established and used in identification of the cells24; • It focuses on the integration of coastal and marine processes with landform responses to them rather than more static, quasi-equilibrium approaches such as those forming the basis for numerical models of beach profile change; and • The consistent methodology applied to identifying the cell hierarchy facilitates up-scaling and down- scaling in assessments of coastal change, a capability recommended in the assessment of coastal vulnerability to meteorologic and oceanographic change25.
6 115°0'0"E 116°0'0"E
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Figure 1: Vlamingh Region coast from Cape Naturaliste to Moore River
May 2015; Plan No: 1748-02-01
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M o LOCATION MAP o r e Indian
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Figure 2: Primary cells of the Vlamingh Region
May 2015; Plan No: 1748-01-01
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M o LOCATION MAP o r e Indian
Ocean R i v e r MOORE RIVER
Western Australia 32 TWO ROCKS 31 Moore River 30 Extent of main figure 29 Cape Naturaliste 28
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Figure 3: Secondary cells of the Vlamingh Region
May 2015; Plan No: 1748-03-01
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Figure 4A: Components of a coastal sediment cell (WAPC 2003)
Figure 4B: Example primary cells (R06A to R06F) (after Collins 1988) Figure 4C: Example secondary cell (R06C10) Figure 4D: Example tertiary cell (R06C10a) 11 The Vlamingh coast Coastal landform development on the microtidal Vlamingh coast, with low present-day supply of sediment, is subject to substantial control by the geologic framework. Control occurs through interaction of the fixed rocky topography, comprising the framework, with coastal processes and available sediments. The framework for the Vlamingh coast has been described at a variety of scales as part of a series of large-scale coastal compartments identified for the whole Western Australian coast26.
Modern Holocene sediments and inherited, remnant landforms abut and overlay the geologic framework. Both are reworked by present-day processes, although typically less for remnant landforms. The partly repetitive patterns of reworking define sediment transport behaviour at all scales. Landforms of the Vlamingh region include: 1. Sand flats, sediment lobes, sand banks and shoals between eefr gaps; 2. Flats, subtidal terraces and sand banks spilling into nearshore basins in the inshore waters; and 3. Tombolos, spits, cuspate forelands and coastal dune barriers along the coast34,35. These landforms provide an indication of the source areas, transport pathways and sinks; although they need to be established in relation to the processes driving coastal change.
The spatial distribution of alongshore sediment supply is affected by the degree of bypassing at rocky coastal features and engineering works. This varies with shoreline aspect and may therefore be subject to decadal- scale fluctuations. Further offshore, discontinuous reef ridges and inshore reef chains provide a leaky constraint to onshore and offshore sediment movement. Shoreward exchange of sediment typically occurs through gaps in the reef chains and may result in pulses of sediment transport to landward. More commonly, material is moved offshore through reef gaps and is lost from the nearshore system. At the shore, the geologic framework in the form of cliffs and bluffs may constrain sediment transport to landward.
The geologic framework provides a context for identification and description of sediment cells. However, transition from the fixed-structural, broad-scale geologic framework of the compartments to the functionally highly-variable, fine-scale sediment cells commonly includes a change in the balance of processes affecting the shore. For example, offshore currents driven by tides or winds may be significant to coastal evolution at a broad scale but not at a local scale where waves are likely to be dominant. This implies there is potential for process- landform interactions to generate errors at a broader or finer scale than a specific scale under investigation. The broader scale interactions commonly are apparent as trends whereas finer scale interactions contribute to the variability of the system being investigated.
Further information on geology, geomorphology, landforms, meteorological and oceanographic processes for the Vlamingh Region is included in previous work undertaken in the areae.g.11,27,28,29,30,31,32,33. Additional geology and geomorphology information is included in the WACoast34,35 database, the Sea to Scarp resources study36 and from a country-scale study of Australian beaches37. Information on terminology used in this report is contained in previous reports26,38,39 and global publications40.
12 Methods for the definition of sediment cells
Coastal sediment compartments, cells and sectors have previously been investigated along large sections of the Vlamingh Region11,41,42,43,44. A hierarchy of large-scale compartments was defined for the whole Western Australian coast26 to provide a geological context for coastal processes within each compartment, hence supporting identification and description of sediment cells.
In the present analysis, techniques originally established for the Vlamingh Region45, with some modification of terminology, have been applied to map sediment cell boundaries. This is a revision of the original Cape Naturaliste to Moore River report, made available in 2012, to ensure a consistent format that was adaptable for the whole Western Australian coast. Notably, the technique used to identify and map sediment cells in the Vlamingh Region is modified for the Mid-West, Northampton and Pilbara Regions46,47,48. It is expected that further revision of the criteria used (Figure 5; Table 1; Table 2; Appendix C) will be required for application to other parts of the Western Australian coast or elsewhere.
A threefold hierarchy of cells was defined by the type and shape of landforms present as well as the frequency of coastal processes and potential landform responses relevant to each scale. The primary cells are larger and the tertiary cells are smaller. Each primary cell is related to a functional coastal land system, whereas the secondary and tertiary cells identify specific coastal landforms and landform components at increasingly detailed scales. Further offshore, primary cells may extend to a continental shelf feature well offshore, whereas a tertiary cell may capture seasonal to decadal nearshore processes. At each scale, cells are likely to vary in area based on the dimensions of the geologic framework containing the coastal landforms or landform elements being considered, together with meteorologic and oceanographic processes driving coastal change.
Tasks undertaken were based on available data, and involved: 1. Review of available literature to determine prevailing regional and local processes driving geomorphic change, including their temporal and spatial attributes; 2. Identification of the geologic framework and environmental context in which processes operate; 3. Establishment of criteria to identify cell boundaries at each level in the hierarchy of spatial scales indicated in Task 1; 4. Application of the criteria along the Vlamingh coast between Cape Naturaliste and Moore River to identify sediment cells; 5. Preparation of digital datasets and maps showing the cells at each of the three levels in the hierarchy; and 6. Comparison of potential differences in the morphodynamic processes active at each level in the cell hierarchy. Information used to define the cells Points along the shoreline that separate sediment cells were derived using the existing knowledge base of the coast, remotely sensed datasets and landform digital datasets (Table B.1 in Appendix B). Datasets used were: 1. Landgate Mean High Water Mark (MHWM) shoreline compiled to 2006; 2. Department of Transport nearshore and inshore LiDAR, Department of Transport nautical charts and isobaths; along with Australian Navy hydrographic charts and isobaths; 3. Onshore geology and geomorphology (including landforms) from Geological Survey of Western Australia34,35; 4. Digitised foredunes, frontal dunes or the foreshore reserve prepared for this project by Geological Survey of Western Australia. 5. A shaded relief model from the Geological Survey of Western Australia; 6. Aerial orthophotography from Landgate; and 7. High-angle oblique aerial photography from Geological Survey of Western Australia34,35.
13 These datasets cover most of the Vlamingh Region but vary with respect to time, spatial scale of capture and level of resolution. These factors limit use of the project datasets which may be reviewed as more detailed information becomes available. For example, the original mapping of coastal landforms was completed in 1985 to 1987 from unrectified stereoscopic aerial photography at a scale of 1:20,000. This scale is adequate for the identification of onshore cell boundaries at a primary and perhaps secondary cell scale but is inadequate at a tertiary cell scale. The information from which the secondary and tertiary cell onshore boundaries were determined also included recent oblique aerial photography, the shaded relief model, 2011 field surveys and landform mapping at 1:2,000-scale using 2006-2008 aerial orthophotomosaics34,35. LiDAR imagery, nautical charts, nautical isobaths and 2006-2008 aerial orthophotomosaics were used for delineation of the offshore boundaries and marine sections of the alongshore boundaries at all cell levels.
Additional information, particularly at a local scale, may facilitate refinement of the cell boundaries. In no particular order the extra information could include: 1. Local seismic surveys to determine rock coverage and depth of sediments; 2. Sediment distributions; 3. Long-term analysis of aerial photographs for dune activity; 4. Benthic habitat information; 5. Extension of LiDAR bathymetry north of Two Rocks; and 6. Contemporary and projected local variations in water levels, waves, currents and winds. For example, detailed assessment of sediment characteristics and processes contributing to their distribution is useful for boundary verification49 (see Detailed evaluation of coastal behaviour). An ongoing review process, say every 10 years, may allow the implications of observed coastal change to be incorporated.
14 Cell boundaries A threefold hierarchy of cells is considered for the Vlamingh coast with each cell represented as two-dimensions because sediment transport pathways include both alongshore and cross-shore processes. Each cell may be thought of holistically as a collection of marine and terrestrial landforms, inter-related by sediment exchange between the landforms.
In this study, points along the shoreline separating the cells have first been identified (Table 1), followed by offshore and onshore boundaries (Figure 5; Table 2). Offshore and onshore boundaries are connected by mapping through the beachface points at the shoreline (Table 1). This sequence provides a focus on the alongshore boundary definition at the shoreline, and therefore on beachface processes, while being aware that significantly higher rates of sediment transport occur in this zone.
Alongshore cell boundaries (beachface points) are principally determined by one or several geologic, geomorphic or engineered features at the shoreline (Table 1). Each alongshore boundary has marine and terrestrial sections that connect the offshore and onshore cell boundaries through the beachface point (Figure 5). Distinctions between morphology and processes at each sediment cell scale are incorporated in criteria used to identify the beachface points and cell boundaries. Separate criteria are described for each level in the hierarchy (see Primary cells, Secondary cells and Tertiary cells). Sediment cells with cliffed or engineered coasts may have alongshore boundaries with no terrestrial section where the beachface point is coincident with the Landgate MHWM to 2006.
A list of features used to determine the alongshore boundary lines for marine and terrestrial sections is included in Table 1. Those identifying the marine section of the alongshore boundaries provide some restriction to sediment transport at varying timescales: from greater than 100 years for primary cells to inter-decadal and higher frequency timescales for tertiary cells. The terrestrial section of alongshore boundaries is the limit of, or discontinuities in, the relative coastal land system or coastal landform between adjacent cells at the scale of interest. Relevant Holocene coastal land systems are used at a primary cell scale, with foredune plains and parabolic dunes at a secondary scale and frontal dunes or foredunes at a tertiary scale. Exceptions occur on islands, engineered coasts and cliffed coasts where there is no terrestrial section of the alongshore boundary. In places where there is no variation in the land system or landform landward of the beachface point, a notional boundary is mapped as a landward extension of the marine boundary line through the beachface point to the onshore boundary along a similar trajectory or orthogonal to the coast (e.g. Warnbro in Figure A.9 in Appendix A).
Points along the shore separating the cells are characterised according to the restriction of sediment transport (open or closed); the extent of the restriction (point or zone) and the potential for migration (fixed or ambulatory). For example the apex of a rocky headland is defined as a fixed point whereas a salient sustained by wave convergence behind a large area of reef is recognised as a fuzzy boundary or zone, although it is geographically fixed. Ambulatory features may be points (e.g. large spits) or zones (e.g. deltas). By definition, an alongshore boundary cannot be ambulatory and closed.
Primary cells evolve over centuries and millennia. They are linked to coastal land systems50,51,52,53,54,55,56,57,58 and broad marine systems11,33. Secondary cells are based on large coastal landforms34,35,36 subject to inter-decadal change. Tertiary cells are based on coastal landforms subject to change on an inter-annual scale, as well as beachface features restricting sediment transport at a seasonal scale.
15
Method overview Method overview1) Identify points at the 1) Identify pointsbeachface at the. beachface. 2) Identify offshore and onshore boundaries. 2) Identify offshore3) Map alongshore and onshore boundaries.boundaries that connect onshore and offshore 3) Map alongshoreboundaries through the boundariesbeachface that connect point. onshore andEach offshore alongshore boundary boundarieshas through a marine the and a beachface point.terrestrial section. 4) Process is iterative and is Each alongshorechecked boundary between cell has a marinescales and. a terrestrial section. 4) Process is iterative and is checked between cell scales.
Figure 5: Cell boundaries - example for R06B7 Data Source: LiDAR by Department of Transport and Department of Planning.
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16 Table 1: Criteria for mapping alongshore boundaries in the Vlamingh Region Variation of criteria will be required when applied to other coastal regions
Primary cell Secondary cell Tertiary cell
Marine Section Marine Section Marine Section ((i) -30m AHD isobath (i) -15m AHD isobath (i) Focal point of sediment transport (ii) Toe of Holocene sediment banks (ii) Fixed by submerged rock outcrops or convergence on banks or reefs (iii) Deepest point of depression or islands (ii) Sediment transport divergence contour reentrant (if depth <-30m AHD)1 (iii) Area of sediment transport (iii) Centreline of an engineered structure (iv) Broad area of sediment transport convergence on banks or reefs or edge of a dredged area convergence (e.g. reefs, banks, change (iv) Centreline of an engineered structure (iv) A marine extension of the beachface in aspect) or edge of a dredged channel point to the offshore boundary (v) A marine extension of the beachface (perpendicular to bathymetric contours point to the offshore boundary where possible) (perpendicular to bathymetric contours (v) Deepest point of depression or where possible) contour reentrant (vi) Deepest point of depression or (vi) Fixed by rock outcrops or islands 1 contour reentrant (if depth <-15m AHD) (vii) Toe of Holocene sediment bank (vii) Toe of Holocene sediment banks (viii) No marine section
Beachface Point (May be multiple Beachface Point (May be multiple Beachface Point (May be multiple reasons for selection of position) reasons for selection of position) reasons for selection of position) (i) Rock structures restricting sediment (i) Rock structures restricting sediment (i) Rock structures restricting sediment transport at a decadal scale transport at an annual scale transport at a seasonal scale (ii) Geomorphic feature (land system or (ii) Geomorphic feature (landform) (ii) Geomorphic feature (landform or landform) (iii) Adjacent cells have a different landform element) Alongshore Boundary Alongshore (iii) Adjacent cells have a different shoreline aspect restricting sediment (iii) Adjacent cells have a different shoreline aspect restricting sediment transport at an annual scale shoreline aspect restricting sediment transport at a decadal scale (iv) Engineered structure (e.g. large transport at a seasonal scale (iv) Engineered structure (e.g. port) or marina) or dredged channel (iv) Engineered structure (e.g. small shipping channel harbour) or dredged channel Terrestrial Section Terrestrial Section Terrestrial Section (i) Boundary of, or discontinuity in, a (i) Boundary of, or discontinuity in a, (i) Boundary of, or discontinuity in, the Holocene land system foredune plain, parabolic dune or frontal foredune (ii) An extension of marine section and dune (ii) Boundary of frontal dune if the beachface point directly to the onshore (ii) An extension of marine section foredune is eroded or absent boundary if there is no change in land and beachface point directly to the (iii) An extension of marine section system between adjacent cells onshore boundary if there is no change and beachface point directly to the (iii) Central ridge line for an island in foredune plains, parabolic dunes or onshore boundary if there is no change frontal dunes between adjacent cells (iv) Centre line of engineered structure in foredunes or frontal dunes between or feature (iii) Centreline of engineered structure or adjacent cells feature (iv) Centreline of engineered structure or (iv) No terrestrial section (e.g. cliffs) feature (v) No terrestrial section (e.g. cliffs)
Note: 1. Isobaths were mapped to the vertical datum of Australian Height Datum (AHD).
17 Table 2: Criteria for mapping onshore and offshore boundaries in the Vlamingh Region Variation of criteria will be required when applied to other coastal regions.
Primary cell Secondary cell Tertiary cell
(i) -30m AHD1 isobath farthest from (i) Continuous -15m AHD1 isobath (i) -5m AHD isobath1 closest to shore for shore closest to shore sheltered coasts dominated by locally (ii) Toe of sediment bank (e.g. Cockburn generated wind waves Sound) (ii) -7m AHD isobath1 closest to shore (iii) Toe of reef ridge closest to shore for partially sheltered, swell-restricted <-15m AHD depth if multiple ridges coasts (e.g. Comet Bay and Burns Beach to (iii) -15m AHD isobath1 closest to shore Two Rocks) for exposed, swell-dominated coasts (iv) Subtidal seaward margin of rock Offshore Boundary Offshore platform (e.g. South of Wreck Point) (v) Toe of terrace or sediment bank (e.g. Cockburn Sound) (i) Landward extent of Holocene land (i) Landward extent of foredune plain (i) Landward extent of foredunes systems (ii) Landward extent of narrow parabolic (ii) Landward extent of the frontal dune (ii) Seaward extent of rock unit on dunes if the foredune is eroded or absent (e.g. moderately to high cliffed coasts without (iii) Landward extent of frontal dunes North of Two Rocks) dunes. If this extends to the beachface (iii) Seaward extent of rock unit on the Landgate MHWM to 2006 has been (iv) Landward extent of foreshore reserve in built areas bluffed to cliffed coasts, without dunes. used If this extends to the beachface the (iii) Landgate MHWM to 2006 on (v) Seaward extent of rock unit on low to Landgate MHWM to 2006 has been engineered coasts with extensive shore moderately high cliffed coasts without used dunes. If this extends to the beachface parallel structures without dunes to (iv) Landgate MHWM to 2006 on landward the Landgate MHWM to 2006 has been used engineered coasts with shore parallel (iv) Central ridge line for an island structures without dunes to landward comprised of Holocene land systems (vi) Landgate MHWM to 2006 on engineered coasts with extensive shore (v) Central line, watershed or ridge line Onshore Boundary Onshore parallel structures without dunes to on promontories or islands landward (vii) Landward extent of estuarine landforms or made ground for flood- prone land with installed mitigation works (e.g. Bunbury and Mandurah) (viii) Central line, watershed or ridge line on promontories or islands
Note: 1. Isobaths were mapped to the vertical datum of Australian Height Datum (AHD).
Primary cells: geologic framework and long-term change in morphology Primary cells (Figure 2) encompass the geologic framework controlling long-term evolution of the coastal land systems, such as coastal barriers, cuspate forelands and large sediment banks. Although substantial changes to these large land systems occur at time scales longer than 100 years, the changes are general trends when considered over coastal management time scales.
At the shoreline, boundaries of primary cells are defined by one, or a combination of, rocky structures, large accretionary landforms, changes in coastal aspect and large engineered structures that restrict sediment transport at a decadal scale. In the Vlamingh Region, five of 13 alongshore cell boundaries of primary cells are defined by a rock structure. This includes rocky headlands at Cape Naturaliste (R06A), Second Head (R06E) and Point Casuarina (now Bunbury Harbour, R06B); and rocky salients at Mallee Reef salient (R06I) and Moore River (northern extent of Cell R06I). A rocky salient is also present at Cape Bouvard (R06C) reflected in the geomorphic feature criterion. Point Casuarina and the Swan River mouth were rocky salient, now extended by Bunbury Harbour (R06B) and the South Mole Fremantle (R06F) engineered structures respectively.
Accretionary landforms include the toe of banks, such as South Sands at Becher Point (Cell R06C12), Southern Flats at Palm Beach Rockingham and Parmelia Bank at Woodman Point groyne (Cells R06D and R06E);
18 salients, such as Yanchep (Cell R06H) and Mallee Reef (Cell R06I); and cuspate forelands, such as Pinnaroo Point (Cell R06G). The large basin within Cockburn Sound (Cell R06E) is a primary cell nested within cell R06D due to the protection provided by Garden Island, Southern Flats and Parmelia Bank. Additional basins included within broader primary cells are Warnbro Sound (R06C), Owen Anchorage and Gage Roads (R06D).
The offshore boundary of primary cells is the -30m AHD isobath or depth contour (Table 2). It is located on the inner continental shelf and seaward of offshore reef ridges impounding inshore lagoons and basins. Selecting this depth includes the outer margin of the shore-parallel ridge of limestone reefs within the cell and provides separation between large-scale ocean currents and the complex inshore circulation patterns. LiDAR imagery and aerial photography reveal migratory bedforms across sand banks and reefs and suggest a considerable volume of sediment transport presently occurs along the outer margin of the ridge and spills landward. This may be primarily related to the Holocene rise in sea level33,59,60 but it also currently occurs as pulsational migration of sand waves and shoals61,62.
The onshore boundary of primary cells is the landward extent of Holocene accretionary land systems, including the foredune plains, transgressive dune systems and the landward shores of barred estuaries and wetlands58,34. Exceptions to this are moderate to high cliffed coasts without dunes to landward, engineered coasts with extensive shore parallel structures without dunes to landward and for Garden Island, which consists of only Holocene Land systems, the central ridge line of the island was used (Table 2). The Landgate MHWM to 2006 has been used for cliffed and engineered coasts (Appendix B). All sections of coast with Landgate MHWM to 2006 as the onshore boundaries require further investigation at a more detailed scale. For example, there may be small pocket beaches or sections with lower elevation rock or engineered structures that have sediment exchange to landward.
The exceptions of cliffed coasts, engineered coasts and central ridge lines of islands also apply at the more detailed, secondary and tertiary cell scales. The mapped representation of the onshore boundary on mixed rock and sand coasts at a secondary and tertiary scale may be located landward of the primary cell onshore boundary as the smaller sections of sandy coast were mapped at the 1:2,000 scale, rather than the 1:20,000 scale for the primary cells.
Secondary cells: regional-scale processes and morphology Secondary cells contain the broad patterns of contemporary (inter-annual to decadal) sediment movement on the inner continental shelf (Figure 2).
The beachface points on the alongshore boundaries may be fixed or ambulatory (Table 1; Table 7). Fixed boundaries include rocky outcrops restricting sediment transport at an annual scale such as at Point Piquet (R06A2), as well as large engineered structures, such as Garden Island causeway (R06D16) and Woodman Point (R06D21). Ambulatory boundaries are associated with areas of convergence of sediment transport which occur on many of the accretionary landforms such as forelands and salients; for example North Becher Point north of Mandurah (R06C12). At the secondary cell scale, many ambulatory boundaries have been stabilised using engineering structures such as Norman Road near Busselton (R06A3) and Catherine Point south of Fremantle (R06D22).
The offshore boundary of secondary cells follows the -15m AHD isobath closest to shore (Table 2). This depth is near the seaward margin of shore-parallel limestone ridges close to shore or the toe of large sediment banks. Selecting this depth encompasses contemporary sediment transport by nearshore wave63 and current processes within the cell, including dispersal of locally derived biogenic material64,61,65,66. Basins and dredged shipping channels function as sediment sinks and are included in secondary cells only to the toe of sediment banks spilling into them (e.g. Jervoise Bay Bank in Cockburn Sound, R06E18). Warnbro Basin is a remnant basin that is largely inactive at the inter-decadal scale. It has been excluded for depths deeper than -15m AHD (R06C12, Figure A.10 in Appendix A). If the cell contains multiple reef ridges, the offshore boundary is the toe of the reef ridge furthest inshore even if the toe is less than -15m AHD depth for example Comet Bay (R06C10) and Burns Beach salient to Two Rocks (R06G29 to R06H31).
19 Onshore boundaries of secondary cells include potential landform activity at an inter-decadal scale. The onshore boundary corresponds to the landward extent of the foredune plain, narrow parabolic dunes or frontal dunes as defined by the Quindalup Q4 category50 or its equivalent. As noted above, an exception to this are low to moderately high cliffed coast without dunes or engineered coasts with extensive shore parallel structures without dunes to landward, where the Landgate MHWM to 2006 is used as the onshore boundary (Table 2). In developed areas, such as Mersey Point (R06D13), the foreshore reserve has been used to establish the onshore boundary. In flood-prone land with installed mitigation works, such as Bunbury (R06B5) and Mandurah (R06C10), the landward extent of estuarine landforms or made ground is used as the onshore boundary. Sediment activity could extend beyond the onshore boundaries of secondary cells in some circumstances. The central line, watershed or ridge line is used as the onshore boundary for promontories and islands where the onshore boundaries of secondary cells are coincident (e.g. central line of Woodman Point, R06E19 and R06D20).
Tertiary cells: local-scale, short-term processes and morphology Tertiary cells incorporate the reworking and movement of sediment near the shore and associated potential seasonal to inter-annual landform response (Figure A series in Appendix A). Tertiary cells perform similar functions to those of secondary cells, often on a finer scale. Their alongshore boundaries and offshore boundaries coincide in some places. Beachface points on the alongshore boundaries of tertiary cells (Table 1), along with onshore and offshore boundaries (Table 2) are highly subject to change. They may be transgressed by extreme events and modified by low frequency coastal processes.
Tertiary sediment cells were identified for the Vlamingh coast, including Garden and Rottnest Islands, and excluding the small reefs, islets and west of the shipping channel through Success and Parmelia Banks.
Beachface points on the alongshore boundaries of tertiary cells restrict sediment transport at a seasonal to inter-annual scale. Fixed boundaries include rocky outcrops along the shore, such as Bickley Point (R06DRI1a) on Rottnest Island. They also include engineered structures, such as marinas and harbours, which restrict sediment transport in depths shallower than the offshore boundaries (-5m AHD, -7m AHD, or -15m AHD isobaths). The installation of engineered structures potentially may change the alongshore boundaries of tertiary cells and lead to development of new cells. Ambulatory boundaries are associated with zones of convergence or divergence associated with local wave refraction and diffraction patterns19,17. Ambulatory boundaries at a tertiary cell scale may be located at the tip of accretionary landforms, such as at Pinnaroo Point (R06F27c) or Mersey Point (R06D13a), as the change in aspect and wave sheltering restrict sediment transport at a seasonal to inter-annual scale.
The offshore boundaries of tertiary cells were mainly defined by three isobaths (Table 2): 1. The -15m AHD isobath has been used in the nearshore zone of the relatively unsheltered and unconsolidated sandy coast between Bunbury and Mandurah (R06B5a to R06C9b). Based on empirical formulae from the USA the majority of sediment transport by waves and wave driven currents take place in this zone63; 2. The -7m AHD isobath was used in the lee of large natural structures with reduced sheltering and where substantially attenuated swell is a significant component of the wave regime. Areas where this occurs include sections of Geographe Bay to Bunbury (R06A2c to R06A4b), Comet Bay to Cape Peron excluding Warnbro Sound (R06C10a, R06C10b and R06D13a to R06D14c), Fremantle to Trigg (R06F25a to R06F26d), and the exposed western side of Garden Island (R06DGI4c to R06D14d); and 3. The -5m AHD isobath was used for more sheltered sections of the coast. In places, this approximately corresponds with the toe of reef platforms, subtidal terraces or large sand shoals flanking the shore. It is applicable where sheltering by offshore reefs and islands results in locally generated wind-waves and partially attenuated swell being prevailing components of the wave regime. Isobaths have not been used to establish offshore boundaries where beaches are perched on rock platforms with subtidal cliffed seaward margins, such as near Two Rocks (R06H31a). The seaward margin of the rock platform is used in such circumstances. In places where there are wide terraces or sediment banks the toe of the feature has been used, such as on the sheltered eastern side of Garden Island (R06GI2a to R06GI4f).
The onshore boundaries of tertiary cells indicate the landward extent of average seasonal processes, which may be superseded annually. Onshore boundaries are either alongshore swales between the foredunes and
20 the frontal dunes or the landward toe of the frontal dunes if foredunes are eroded or absent (Table 2). These landforms are highly changeable. It is likely discrepancies will occur between what was mapped and what may be observed at present or in the near future. Such discrepancies should signal a requirement for more detailed mapping and accurate identification of boundary and landform change at a tertiary scale. The onshore boundaries of tertiary cells are not indicative of the landward extent required for engineering, planning and management investigations. However, they may be used as a marker to establish higher frequency changes at the shore.
Exceptions to the landward extents of landforms as onshore boundaries are cliffed coasts or engineered coasts with extensive shore parallel structures (e.g. seawalls) without dunes to landward; and the central line on promontories or islands (e.g. Garden Island).
Rivers, streams and drains The main estuarine systems of the area are the Vasse-Wonnerup, Collie and Preston, Peel-Harvey, Swan- Canning and Moore River estuaries (Figure 1). There are also many small streams and wetland drains that extend to the coast. Most of the ocean entrances of rivers, streams and drains have barred mouths that can breach and flow intermittently67,68. The mouths can switch from being a sediment source during flood events, to potentially acting as sediment sinks during intervening periods.
Onshore boundaries for rivers and drains in the Vlamingh Region have been represented in datasets and the figures in this report as a truncation between the dune and alluvial landforms on opposite banks of the rivers or as a truncation across reclaimed ground in Port areas. In this respect the onshore boundary does not comprehensively represent the onshore extent of estuarine processes within each river or drain. Further investigation of landforms and sediment budgets adjacent to rivers, streams or drains should include: • The landward extent of the majority of sediment exchange, which is often indicated by flood-tide shoals within estuary mouths. • All alluvial landforms with connection to the coast; • The potential for alluvial landforms to become estuarine with changing climatic conditions; • The capacity for flooding; • Sediment transport along the river; • Maintenance dredging or bypassing at Port Geographe, Bunbury, Dawesville, Mandurah and Fremantle69; and • Sediment transport fluxes associated with opening and closing of sand bars across river mouths.
Marine sections of the alongshore cell boundaries may follow the submarine paleo-channels of rivers, which are likely to trap sediment or divert sediment movement. For the Vlamingh coast the marine sections of some primary boundaries follow paleo-channels of the Collie River (Bunbury Harbour R06B), Swan River (South Mole Fremantle R06F) and Moore River (Guilderton R06I). At a secondary cell scale engineered features restrict sediment and control the alongshore boundaries at Bunbury Harbour and South Mole Fremantle, with the paleo-channels of the Capel River (R06A3) and Moore River providing the main control. The barred Moore River mouth is functional within a tertiary cell and does not constitute a boundary at that scale.
Cell labels The cell labelling convention follows the direction of prevailing littoral drift according to: 1. Region – increasing order of R01, R02 to R13 from the South Australia border26. The Vlamingh Region is region R06; 2. Primary cell – upper case letter resetting for each region; 3. Secondary cell – number resetting for each region. Rottnest Island and Garden Island secondary cells are labelled RI1 to RI4 and GI1 to GI4 respectively; 4. Tertiary cell – lower case letter resetting for each secondary cell with letters increasing in the direction of littoral drift or clockwise around islands, for example 14a; and 5. Quaternary cell – Roman numeral resetting for each tertiary cell, for example 14ai. Quaternary cells were not applicable in this investigation. Vlamingh cells are labelled to the tertiary cell, for example R06A1a, from south to north following the direction of prevailing littoral drift.
21 Sediment cell results along the Vlamingh coast Nine primary cells, 40 secondary cells and 81 tertiary cells were identified along the Vlamingh coast between Cape Naturaliste and the Moore River. The hierarchy of cells is presented as maps, tables and electronic datasets available from the Department of Transport (Table 3), along with the coastal sediment cells spatial browser (see Note 1 below Table 3). Table 3: Location of cell results for the Vlamingh Region Item Further information included Location in report
Beachface points Information on the beachface point on alongshore boundaries at all three sediment on the alongshore cell scales. This includes features that define the beachface point, coordinates and boundaries1 character of the boundary
Alongshore Information on the features that define the marine and terrestrial sections of the Tables in Appendix D boundaries1 alongshore boundaries for all three sediment cell scales
Onshore and Information on the features that define the onshore and offshore boundaries for offshore boundaries1 cells at all three sediment cell scales
Cell names Hierarchy of cell names including cell labels Table 4
Primary and secondary cells at 1:1,250,000 scale at A4 size Figure 2 and Figure 3
Maps of cells Figures A.1-A.18 in Secondary and tertiary cells at 1:100,000 scale at A4 size Appendix A
Coincidence of cell Boundary names and coincidence at different levels in the hierarchy Table 5 boundaries
Note: 1. The boundaries and beachface points may be viewed as Google Earth KMZ files on the Department of Transport website. A spatial browser to view the datasets will be available in 2016, with the address to be provided on the Department of Transport website. Electronic datasets of boundaries and beachface points are available from the Department of Transport upon request in geodatabase format or ESRI shapefile format.
Cell boundaries The alongshore spatial scale of cells in the Vlamingh Region varies with wave exposure, geologic framework, sediment availability, aspect and its location on an island. The mean length of cells was 44km (13-87km), 10km (0.7- 28km) and 5km (0.7-20km) for primary, secondary and tertiary cells respectively (Table 6). Larger cells in the size ranges are present on open coasts with reduced reef sheltering and large rock outcrops, with smaller cells in the size ranges on coasts with increased geological control, such as coasts with tombolos or in the lee of large islands. Secondary and tertiary cell boundaries may be coincident for coasts that are open or have inherited features.
There is some consistency in scale with littoral cells reported from elsewhere, overseas and on the WA coast. Spatial scales of primary cells (13‑87km) are smaller than the littoral cells in England, Wales and Scotland (50‑300km)13,14 and the Pilbara Region (100‑455km)48; and at a similar scale to cells in the Mid-West and Northampton Regions (37-78km, 33-66km)46,47, California (10-95km)20 and Hawkes Bay, New Zealand (20‑60km)70. The Vlamingh Region has more smaller primary cells than the adjacent Mid-West Region46, because of large islands within the primary cell boundaries and the more continuous offshore ridges providing more sheltering in the Vlamingh Region. The local primary and secondary cell scales correspond with sub-cell scales in the United Kingdom. The comparison across the hierarchy of cells provides confidence in linking cell dimensions to the geologic framework, sediment availability and different metocean processes driving shoreline change at each scale.
22 Nine (69%) primary cell boundaries are also secondary and tertiary cell boundaries (Table 5). Exceptions occur for large inherited features in Warnbro Sound (R06C), the edge of Parmelia Bank (R06D/R06E) at a remnant spit (R06D/ R06E); and a barred river mouth at Guilderton (R06I). Thirty-seven (91%) secondary cell boundaries are also tertiary cell boundaries, with 46 (55%) unique tertiary cell boundaries.
The cell hierarchy and boundary character classification (Table 4; Table 7) reveal the complexity of the coastal system of the region which has varied rock control and inherited features. The majority (≈85%) of boundaries are open at all three scales with varying degrees of sediment transport leakage. Notably, sediment flow directions may be reversed with changes in meteorological and oceanographic conditions, with some boundaries effectively closed for one sediment transport direction.
Boundaries are ambulatory (≈30%) where rock control is on the sub-tidal part of the shoreface and may be defined as a zone where there is limited to no rock control on the beachface. At all scales, half of all cell boundaries are points and half are zones, with more than 60% of mainland tertiary cells characterised as a zone. There are more ambulatory boundaries at the tertiary scale (39% total with 48% on the mainland) than the primary scale (23%). Landforms adjacent to tertiary cell boundaries are susceptible to variation as a result of both sub-tidal and inter-tidal rock control.
23 Table 4: Primary, secondary and tertiary sediment cells of the Vlamingh Region
Region Primary Secondary Tertiary R07. Mid-West Beyond Study Area Beyond Study Area Region d. Guilderton S to Guilderton N
I. Mallee Reef salient to 32. Mallee Reef salient to Moore c. Wilbinga Rocks to Guilderton S Moore River River b. Wilbinga to Wilbinga Rocks a. Mallee Reef salient to Wilbinga 31. Wreck Point to Mallee Reef a. Wreck Point to Mallee Reef salient H. Yanchep to Mallee Salient Reef salient b. Yanchep Headland N to Wreck Point 30. Yanchep to Wreck Point a. Yanchep to Yanchep Headland N d. Alkimos to Yanchep c. Quinns Rock N to Alkimos 29. Burns Beach Salient to Yanchep G. Pinnaroo Point to b. Mindarie Keys N to Quinns Rock N Yanchep a. Burns Beach salient to Mindarie Keys N 28. Pinnaroo Point to Burns Beach b. Ocean Reef Marina to Burns Beach Salient Salient a. Pinnaroo Point to South of Ocean Reef Marina c. Hillarys Marina to Pinnaroo Point 27. Trigg to Pinnaroo Point b. South Sorrento to Hillarys Marina a. Trigg to South Sorrento d. Brighton Road to Trigg F. South Mole Fremantle c. Empire Avenue to Brighton Road to Pinnaroo Point 26. Mudurup Rocks to Trigg b. north Swanbourne Pipe to Empire Avenue a. Mudurup Rocks to north Swanbourne pipe 25. South Mole Fremantle to b. Leighton salient to Mudurup Rocks Mudurup Rocks a. Rous Head to Leighton salient R06. Vlamingh D. Warnbro to South 22. Catherine Point to South Mole a. Catherine Point to South Mole Fremantle Region Mole Fremantle including Fremantle from Cape Rottnest Island and 21. Woodman Point to Catherine Naturaliste excluding Cockburn Point a. Woodman Point to Catherine Point to Moore Sound (Section 3: River Northern section from 20. Woodman Point groyne to Woodman Point groyne to Woodman Point a. Woodman Point groyne to Woodman Point South Mole Fremantle) 19. Australian Maritime Complex to a. Australian Maritime Complex to Woodman E. Cockburn Sound Woodman Point groyne Point groyne (Section 1: Mainland Section from Palm Beach 18. James Point to Australian a. James Point to Australian Maritime Complex Rockingham to Woodman Maritime Complex Point groyne) 17. Palm Beach Rockingham to James Point a. Palm Beach Rockingham to James Point 16. Garden Island Causeway to a. Garden Island Causeway to Palm Beach Palm Beach Rockingham Rockingham D. Warnbro to South Mole Fremantle including 15. Cape Peron to mid-Southern a. Cape Peron to mid-Southern Flats and Garden Rottnest Island and Flats and Garden Island Causeway Island Causeway excluding Cockburn c. Bird Island to Cape Peron Sound (Section 1: 14. Mersey Point to Cape Peron b. Seal Island to Bird Island Southern section from Warnbro to Palm Beach a. Mersey Point to Seal Island Rockingham) 13. Safety Bay to Mersey Point a. Safety Bay to Mersey Point 12. North Becher Point to Safety a. North Becher Point to Safety Bay (excluding Bay (excluding Warnbro basin) Warnbro Basin) 11. Ansteys Car Park to North Becher Point a. Ansteys Car Park to North Becher Point C. Cape Bouvard to 10. Robert Point to Ansteys Car b. San Remo to Ansteys Car Park Warnbro Park a. Robert Point to San Remo b. Dawesville to Robert Point 9. Cape Bouvard to Robert Point a. Cape Bouvard to Dawesville
24 Table 4: Primary, secondary and tertiary sediment cells of the Vlamingh Region
Region Primary Secondary Tertiary Region Primary Secondary Tertiary R07. 8. Preston Beach North to Cape b. Lake Clifton North to Cape Bouvard Mid-West Beyond Study Area Beyond Study Area Bouvard a. Preston Beach North to Lake Clifton North Region d. Guilderton S to Guilderton N 7. Lake Preston South to Preston Beach North a. Lake Preston South to Preston Beach North I. Mallee Reef salient to 32. Mallee Reef salient to Moore c. Wilbinga Rocks to Guilderton S B. Bunbury Harbour to b. Myalup North to Preston South Moore River River Cape Bouvard 6. Binningup to Lake Preston South b. Wilbinga to Wilbinga Rocks a. Binningup to Myalup North a. Mallee Reef salient to Wilbinga c. Buffalo Road to Binningup 31. Wreck Point to Mallee Reef 5. Bunbury Harbour to Binningup b. Leschenault South to Buffalo Road Salient a. Wreck Point to Mallee Reef salient H. Yanchep to Mallee a. Bunbury Harbour to Leschenault South Reef salient b. Yanchep Headland N to Wreck Point 30. Yanchep to Wreck Point b. Stirling Beach to Bunbury Harbour a. Yanchep to Yanchep Headland N 4. Capel River mouth to Bunbury Harbour a. Capel River mouth to Stirling Beach d. Alkimos to Yanchep d. Forrest Beach to Capel River Mouth c. Quinns Rock N to Alkimos 29. Burns Beach Salient to Yanchep 3. Norman Road to Capel River c. Wonnerup to Forrest Beach G. Pinnaroo Point to b. Mindarie Keys N to Quinns Rock N Mouth b. Busselton to Wonnerup Yanchep a. Burns Beach salient to Mindarie Keys N A. Cape Naturaliste to a. Norman Road to Busselton 28. Pinnaroo Point to Burns Beach b. Ocean Reef Marina to Burns Beach Salient Bunbury Harbour d. Marybrook to Norman Road Salient a. Pinnaroo Point to South of Ocean Reef Marina c. Point Templar to Marybrook c. Hillarys Marina to Pinnaroo Point 2. Point Piquet to Norman Road b. Point Daking to Point Templar 27. Trigg to Pinnaroo Point b. South Sorrento to Hillarys Marina a. Point Piquet to Point Daking a. Trigg to South Sorrento 1. Cape Naturaliste to Point Piquet a. Cape Naturaliste to Point Piquet d. Brighton Road to Trigg F. South Mole Fremantle c. Empire Avenue to Brighton Road Garden Island Ridge to Pinnaroo Point 26. Mudurup Rocks to Trigg b. Bathurst Point to Philip Point b. north Swanbourne Pipe to Empire Avenue RI4. North Point to Philip Point a. North Point to Bathurst Point a. Mudurup Rocks to north Swanbourne pipe c. Rocky Bay to North Point 25. South Mole Fremantle to b. Leighton salient to Mudurup Rocks RI3. Cape Vlamingh to North Point b. Abraham Point to Rocky Bay Mudurup Rocks a. Rous Head to Leighton salient R06. a. Cape Vlamingh to Abraham Point Vlamingh D. Warnbro to South 22. Catherine Point to South Mole a. Catherine Point to South Mole Fremantle Region Mole Fremantle including Fremantle c. South Point to Cape Vlamingh from Cape Rottnest Island and 21. Woodman Point to Catherine R06. RI2. Parker Point to Cape Vlamingh b. Kitson Point to South Point excluding Cockburn a. Woodman Point to Catherine Point Naturaliste Point Vlamingh a. Parker Point to Kitson Point to Moore Sound (Section 3: Region River Northern section from from Cape b. Bickley Point to Parker Point 20. Woodman Point groyne to a. Woodman Point groyne to Woodman Point D. Warnbro to South RI1: Philip Point to Parker Point Woodman Point groyne to Woodman Point Naturaliste Mole Fremantle including a. Philip Point to Bickley Point South Mole Fremantle) to Moore Rottnest Island and 24. Stragglers Rocks to West 19. Australian Maritime Complex to a. Australian Maritime Complex to Woodman River excluding Cockburn Shipping Channel, northwest E. Cockburn Sound Woodman Point groyne Point groyne Sound (Section 2: Garden Success Bank (Section 1: Mainland Island west to Second No tertiary cells defined for reefs and islets 18. James Point to Australian 23. Carnac Island to Stragglers Section from Palm Beach Maritime Complex a. James Point to Australian Maritime Complex Head, Success and Rockingham to Woodman Parmelia Banks west of Rocks, west Parmelia & Success Banks Point groyne) 17. Palm Beach Rockingham to a. Palm Beach Rockingham to James Point the shipping channel & James Point Rottnest Island) GI3: Parkin Point to Collie Head and GI2a. Garden Island Jetty to Parkin Point spit 16. Garden Island Causeway to a. Garden Island Causeway to Palm Beach to mid-Southern Flats (Links with cell (extends into GI2) Palm Beach Rockingham Rockingham GI2) D. Warnbro to South a. Parkin Point spit to Collie Head Mole Fremantle including 15. Cape Peron to mid-Southern a. Cape Peron to mid-Southern Flats and Garden 14. Section 2 from Collie Head to Rottnest Island and Flats and Garden Island Causeway Island Causeway Baudin Point (Garden Island S) d. Collie Head to Baudin Point excluding Cockburn c. Bird Island to Cape Peron a. Baudin Point to Buache Bay Sound (Section 1: 14. Mersey Point to Cape Peron b. Seal Island to Bird Island Southern section from b. Buache Bay to Point Atwick Warnbro to Palm Beach a. Mersey Point to Seal Island GI4: Baudin Point to Dance Head to c. Point Atwick to Entrance Point Rockingham) 13. Safety Bay to Mersey Point a. Safety Bay to Mersey Point Carnac Island d. Entrance Point to Beacon Head 12. North Becher Point to Safety a. North Becher Point to Safety Bay (excluding e. Beacon Head to Second Head Bay (excluding Warnbro basin) Warnbro Basin) f. Second Head to Armaments Jetty 11. Ansteys Car Park to North a. Ansteys Car Park to North Becher Point Becher Point GI1. Dance Head to Colpoys Point a. Armaments Jetty to Cliff Point C. Cape Bouvard to 10. Robert Point to Ansteys Car b. San Remo to Ansteys Car Park b. Cliff Point to Colpoys Point Warnbro Park a. Robert Point to San Remo b. Dawesville to Robert Point 9. Cape Bouvard to Robert Point E. Cockburn Sound a. Cape Bouvard to Dawesville (Section 2: Garden Island east Section from Second Head to Parkin Point) GI2a. Garden Island Jetty to Parkin Point spit GI2: Colpoys Point to Parkin Point (extends into GI4)
25 Table 5: Sediment cell alongshore boundaries of the Vlamingh Region Coordinates, alongshore boundary character, onshore and offshore boundaries, along with marine and terrestrial sections of the alongshore boundary are in the geodatabase, the sediment cells spatial browser and Appendix D
Cell alongshore boundary name Cell boundaries Cell alongshore boundary name Cell boundaries Mainland Preston Beach North 2°, 3° Guilderton N 3° Lake Preston South 2°, 3° Moore River 1°, 2° Myalup North 3° Guilderton S 3° Binningup 2°, 3° Wilbinga Rocks 3° Buffalo Road 3° Wilbinga 3° Leschenault South 3° Mallee Reef salient 1°, 2°, 3° Bunbury Harbour 1°, 2°, 3° Wreck Point 2°, 3° Stirling Beach 3° Yanchep headland N 3° Capel River Mouth 2°, 3° Yanchep 1°, 2°, 3° Forrest Beach 3° Alkimos 3° Wonnerup 3° Quinns Rock N 3° Busselton 3° Mindarie Keys N 3° Norman Road 2°, 3° Burns Beach Salient 2°, 3° Marybrook 3° South of Ocean Reef Marina 3° Point Templar 3° Pinnaroo Point 1°, 2°, 3° Point Daking 3° Hillarys Marina N 3° Point Piquet 2°, 3° Hillarys Marina 3° Cape Naturaliste 1°, 2°, 3° South Sorrento 3° Trigg 2°, 3° Rottnest Island Brighton Road 3° Philip Point 2°, 3° Empire Avenue 3° Bathurst Point 3° north Swanbourne pipe 3° North Point 2°, 3° Mudurup Rocks 2°, 3° Rocky Bay 3° Leighton salient 3° Abraham Point 3° Rous Head 3° Cape Vlamingh 2°, 3° South Mole Fremantle 1°, 2°, 3° South Point 3° Catherine Point 2°, 3° Kitson Point 3° Woodman Point 2°, 3° Parker Point 2°, 3° Woodman Point groyne 1°, 2°, 3° Bickley Point 3° Australian Maritime Complex 2°, 3° James Point 2°, 3° Garden Island Palm Beach Rockingham 1°, 2°, 3° Second Head 1°, 3° Garden Island causeway 2°, 3° Dance Head 2° Cape Peron 2°, 3° Armaments Jetty 3° Bird Island 3° Cliff Point 3° Seal Island 3° Colpoys Point 2°, 3° Mersey Point 2°, 3° Garden Island Jetty (to Colpoys Pt) 3° Safety Bay 2°, 3° Parkin Point 1°, 2° Warnbro 1° Parkin Point spit 3° North Becher Point 2°, 3° Collie Head 2°, 3° Ansteys Car Park 2°, 3° Baudin Point 2°, 3° San Remo 3° Buache Bay 3° Robert Point 2°, 3° Point Atwick 3° Dawesville 3° Entrance Point 3° Cape Bouvard 1°, 2°, 3° Beacon Head 3° Lake Clifton North 3°
26 Table 6: Alongshore length of cells of the Vlamingh Region
Cell level Minimum length (km) Maximum length (km) Mean length (km) Median length (km)
1° 13 87 44 29
2° 0.7 28 10 9
3° 0.7 20 5 4
Table 7: Alongshore boundary characteristics of cells of the Vlamingh Region Alongshore boundary characteristics for each cell are in the geodatabase, the sediment cells spatial browser and Appendix D
All Vlamingh Region boundaries Mainland boundaries only
Primary Secondary Tertiary Tertiary
Count % Count % Count % Count %
Point 7 54% 22 55% 44 52% 24 39%
Zone 6 46% 18 45% 40 48% 38 61%
Fixed 10 77% 23 58% 51 61% 32 52%
Ambulatory 3 23% 17 43% 33 39% 30 48%
Open 2 15% 5 13% 11 13% 8 13%
Closed 11 85% 35 88% 73 87% 54 87%
27 Along coast variation of sediment cells Geographic differences in geology, sediments and processes cause alongshore variation in the characteristics of sediment cells over both regional and sub-regional scales. These differences change the relative influence of the criteria used to define sediment cells boundaries. They identify which attributes best define the sediment cells and at what scale.
Intra-regional variation in sediment cells of the Vlamingh Region is described according to primary cells, linkages with the seafloor terrain, onshore sedimentary landforms and coastal processes. The Vlamingh Region comprises offshore reefs, a series of mainly submerged limestone ridges and islands; submarine rocky pavement; inshore basins and inter-barrier lagoons, sea grass meadows, sand banks, shore platforms, cliffs and bluffs; estuaries; and several types of barrier dunes along the shore including mobile sand sheets34,35. The barriers include broad salients, cuspate forelands, tombolos, foredune plains, beach ridge plains and high ridges of parabolic dunes. Some foredunes and parabolic dunes impound back-barrier lagoons. The distribution of these landforms differs between the four broad areas comprising the region.
The coast is fronted by a shelf that is approximately 50km wide out to 50m depth33. Changes in the plan form of the reefs and cliffs, their position of outcropping along the shore; sheltering by Cape Naturaliste and islands of the Garden Island Ridge; and the development of large sedimentary landforms contribute to local variation in coastal aspect and exposure. Hence, there is significant variation in the relative intensity of meteorological and oceanographic processes affecting the shore.
The southern part of the region (Cells R06A and R06B) corresponds with the sector between Cape Naturaliste and Robert Point identified previously11. The southern cell (R06A) includes the broad shallow waters of Geographe Bay and sandy beaches between granite outcrops from Cape Naturaliste to Point Daking to basalt outcrops at Bunbury. The bay has a number of rivers and streams that discharge into estuaries, estuarine and alluvial flats fronted by foredune plains (Point Daking to Forrest Beach) and barrier lagoons (Forrest Beach to Point Casuarina). The foredune plains have a contemporary sand supply from migratory bars. Cell R06B is more exposed to swell waves, with shore-parallel reefs and some areas of rock outcropping along the shore, particularly as cliffs and bluffs in the north. Dunes and parabolic dunes impound lagoons to landward. Human intervention at Bunbury Harbour and the Cut transfer erosion along the coast due to strong alongshore sediment transport potential in this area.
Between Mandurah and Fremantle (Cells R06C to R06E) the coast is sheltered by limestone ridges and inshore basins with Five Fathom Bank Ridge and Garden Island Ridge including the large islands of Garden Island and Rottnest Island. A third ridge, the Spearwood Ridge, outcrops in areas along the coast as beach rock, bluffs and cliffs. This section of coast has been the main area of Holocene sediment deposition along the coast from Cape Naturaliste to Fremantle. As sea level rose to its peak in approximately 7,000-6,000 years ago sediment was pushed landward through low sectors of reef to form large banks and sedimentary accumulation features along the shore, such as the Rockingham-Becher foredune plain. Inshore basins were formed adjacent to large sand banks in Warnbro Sound, Cockburn Sound (nested cell R06E) and Owen Anchorage.
The Swan River, its paleo-channel and the river training walls (north and south mole) are the southern extent of the next section of coast between Fremantle and the cuspate foreland at Hillarys (R06F). This cell is located in the lee of Rottnest Island, with dunes and sand sheets overlaying older Pleistocene limestone that outcrops at many locations along the shore; at Cottesloe, Swanbourne, and Trigg to Sorrento for example.
In the northern part of the region (Cells R06G to R06I) the shore is sheltered by three continuous ridge and reef chains as well as complex inshore reefs. The three ridges of Staggie, Marmion Reef and Spearwood are parallel to the shore. There is substantial variation in ridge height along the coast. This variation apparently contributes to the formation of coastal landforms such as the salients and cuspate forelands at Quinns Rocks and Wreck Point. Rock outcrops along the shore as subtidal pavements, inter-tidal platforms, small bluffs and headlands. Four marinas are located in these three cells, providing further interruption of sediment transport patterns and feedback affecting adjacent coastal landforms.
28 Inter-regional variation in sediment cells is summarised by comparing the criteria for mapping cells for the four regions of Vlamingh, Mid-West, Northampton and Pilbara. Criteria for defining sediment cells for the Vlamingh Region were more similar to the Mid-West46 and Northampton Regions47, than the Pilbara Region48. Despite the differences, a consistent approach has been used to determine the beachface point on the alongshore boundaries and follows the procedure described in the coastal compartments report26. Differences in criteria between the Vlamingh Region and Mid-West/Northampton Regions are related to engineering modifications and the presence of near continuous ridges formed by elongate reefs, large islands and basins in the Vlamingh Region (Appendix C). Differences in criteria between the Vlamingh Region and Pilbara Region is related to a shift in dominant forcing from waves in the southern region to tidal reworking, extreme waves and increased river activity in the Pilbara (Appendix C).
29 Applications In this report, sediment cells are areas in which there is strong connectivity between marine and terrestrial landforms. Hence, they are natural management units, presented in a simple spatial format. Applications of sediment cells include identification of spatial context for coastal evaluations; a common framework for dialogue about the coast; support to coastal management decision-making and a range of technical uses largely relating to coastal stability assessment. Some uses of sediment cells are listed in Table 8 and briefly described below.
Table 8: Applications of sediment cells
• Identification of area to be evaluated Context • May be used for problem scaling
• Cross-jurisdictional co-operation Communication • Spatial basis readily comprehended by non-technical audience • Common framework for discussion between disciplines
• Screening destabilising actions from high coastal amenity Decision-Making • Recognition of stabilisation trade-offs
• Improved coastal erosion assessment • Sediment budget development Technical Use • Upscaling and downscaling of coastal information • Identification of key coastal processes • Landform vulnerability assessment
Context As defined in this report, sediment cells provide an indication of a spatial area within which marine and terrestrial landforms are likely to be connected through processes of sediment exchange. This implies that either natural or imposed changes at any point in the cell may affect any other part, recognising such relationships are strongly bound by proximity. A fundamental use of sediment cells is therefore one of context, to identify an area that should be considered in a coastal study. Specifically, questions that should be considered are: • How may an imposed action, such as installation of a groyne, affect the wider coast through changes to the sediment budget? • Have changes to the wider area influenced locally observed response? Note that this does not mean that sediment cells must be used to define a study area or model area. These are typically smaller due to data or budget limitations.
A qualitative assessment within the sediment cells context is often valuable for problem scaling when dealing with coastal instability. Considering whether an observed issue is prevalent within a cell or adjacent cells may provide guidance on the type of management solutions available, and therefore suggest the form of technical advice most likely to be useful (Figure 6). For example (labelling corresponds to panels in Figure 6): A. If there is a balance of erosion and accretion within a sediment cell, there is potential opportunity to manage the problem through coastal stabilisation works, which transfer stresses along the coast; B. For a coastal stability issue that is affecting the majority of a sediment cell, it is appropriate to improve coastal resilience, including techniques that improve the transfer of sand from the nearshore to the beach and dune system; C. If erosion and accretion occur differently between cells, it is possible that the stress can be more evenly distributed, including artificial interventions such as bypassing. However, limited natural sediment transfer at cell boundaries determine that balancing erosion and accretion requires long-term management; D. If erosion or accretion is prevalent across multiple cells, the issue is likely to be dominant in the long term. This typically requires a decision about where to focus the problem, such as through identification of sacrificial coastal nodes.
30 Figure 6: Use of sediment cells for problem scaling
Communication A key feature of the sediment cell framework is its development from physical attributes rather than a jurisdictional basis. This highlights situations where communication between coastal managers may be necessary, and supports formation of strategic planning groups such as the Peron-Naturaliste Partnership (R06A to R06D) or Cockburn Sound Coastal Alliance (R06D and R06E).
The relatively simple spatial representation of sediment cells may be a valuable tool for communication between technical agencies and the general public. Recent application of coastal process connectivity mapping24 has highlighted the value of simple spatial tools to help explain the basis for coastal management decisions to a non- technical audience.
The value of communicating through a common spatial framework may also enhance dialogue between technical staff involved in different disciplines. The framework of sediment cells and coastal compartments are designed to be of use for coastal management across multiple scales, from engineering through to strategic planning26. However, the strong relationship between habitats and morphology71, includes links between catchments areas and sediment cells. This more broadly suggests that sediment cells may have value as natural management units when considering natural resource management or coastal ecosystem services. Decision-making Recognition of the inter-connected nature of marine and terrestrial landforms within a sediment cell may support simplified decision-making by coastal managers, including local and State government agencies.
For agencies managing large areas, sediment cells can be used for low-cost geographic screening, particularly when combined with the direction of net alongshore sediment transport. As the cells provide preliminary guidance regarding the possible extent of development impacts, the cells framework may be used to guide the distribution of infrastructure. For example, destabilising infrastructure may be preferentially excluded from a cell containing sensitive or high amenity coastal areas. Alternately, a largely isolated single cell may be identified as a strategic coastal node, with focused coastal protection works and interventions creating a minimised coastal footprint.
An objective of the sediment cells definition is to focus coastal managers’ attention upon the connected nature of marine and terrestrial landforms. This is intended to disrupt expectation that the whole coast under management can be made stable. For every effort toward stabilisation, the consequent trade-off should be clearly identified and understood. This way of thinking reduces the likelihood of tail-chasing through successive coastal stabilisation works.
31 Technical use A major technical use for sediment cells is to improve erosion hazard assessments by better integrating regional and local coastal change. Regional changes may include the effects of climate or sea level fluctuations and the consequent variations in sand supply. Local changes include storm responses and coastal interactions with natural and artificial structures. Improved knowledge of how local changes may have broader impact is essential to good coastal planning20,21,22,,72,73,74. Equally, refined understanding of how regional change influences local response can improve setback assessment75 and structural design76.
Sediment cells evaluated for regional processes should be identified based on the relative magnitude of local coastal change and the proximity to cell boundaries. Large-scale engineering works, such as ports and harbours, should be considered over the full hierarchy of primary, secondary and tertiary sediment cells to ensure adequate identification of possible effects. However, most planning and engineering investigations require consideration at a secondary cell scale as this incorporates broad sediment transport processes over inter-decadal timescales. If proposed works are unlikely to restrict sediment transport on an inter-annual scale, assessment may occur at tertiary cell scale. In all cases, proximity to a cell boundary may suggest the need to consider adjacent cells.
Landform information used to develop the sediment cells, including indications of sediment transport pathways and sinks, is equally important to the development of quantitative sediment budgets. Consequently, the sediment cells framework provides a useful spatial basis for the development of sediment budgets1,2,6. The effect of timescale on sediment budget variability is acknowledged along the Vlamingh coast, with ocean- estuary exchange and pulses of sand supply contributing to these fluctuations. A recent example of a detailed application of a sediment budget-based coastal assessment is the study in the Geraldton area of the Mid-West Region49 (Cell R07F).
Definition of sediment cells (and coastal compartments26) over multiple spatial scales supports the processes of upscaling and downscaling, where information collected or applicable at one particular scale is made meaningful at another larger or smaller spatial scale. Upscaling involves the aggregation of information from a finer scale, often sparse across the wider area. Downscaling involves interpretation of coarse scale information at a finer scale, usually through the use of additional information. The concepts of upscaling and downscaling are important tools for combining regional and local coastal change assessments, often using a sediment budget approach.
Connectivity of marine and terrestrial landforms is used as a basis for sediment cell definition. The identified landforms and pathways for transport may also suggest the key active coastal process and therefore indicate appropriate conceptual models for coastal dynamics. Mapping of coastal morphology in the Vlamingh Region has been described as part of the WACoast series34,35.
32 Modification of cell boundaries
Although the cell boundaries have been presented as a spatial framework, they are based upon interpretation of geomorphic information. Therefore boundaries may require revision according to either the intended application or due to further relevant information being obtained. Common reasons to update the database describing the cells may include: • Large-scale change that will affect cell connectivity; • Coastal change near a cell boundary; • Modification due to engineering works; or • More detailed evaluation of active coastal behaviour.
Sediment cell connectivity Determination of the number and scale of sediment cells used for coastal assessment should involve consideration of the magnitude and timescale of coastal change as well as the relative connectivity between sediment cells. It is appropriate to consider multiple sediment cells when evaluating larger or more sustained coastal change, or when assessing cells with moderate or high connectivity. Cell connectivity is indicated by the nature of the coastal boundary, with higher connectivity occurring where: • The boundary is open or ambulatory; for example, sediment transfer occurring across boundaries on salients and cuspate forelands; • Reversal of littoral drift direction is known to occur; • There is an onshore feed of sediment; • A boundary is located on a sediment source or sink; or • Boundaries providing headland control of estuary entrances to coastal lowlands.
Investigation of coastal processes should recognise the potential role of connectivity between cells, including the relative significance of prevailing and extreme events in driving linkage of adjacent cells.
In situations where coastal change is substantial, such as coastal adjustment subsequent to mass deposition from a river system, or the potential impact of sea level rise over the next hundred years, there is potential for change to affect even rock boundaries. Users of the cell framework on mixed rock and sand coasts, such as the Vlamingh coast, should consider: 1. Sections of coast which have occasional outcrops of rock and are progressively eroding will potentially reach points where either the rock has reduced influenced on the coast, or a newly exposed area of rock starts to control the coastal configuration. These changes of coastal state may effectively alter sediment cell boundaries. 2. The influence of ockr features that control the coast through sheltering may change with sediment supply. The resulting sandy features, salients or cuspate forelands, may migrate under changing meteorological, oceanographic or sediment supply conditions. This can occur following a loss of offshore reef control, as has been reported for a calcarenite coast77, or if there is a reduction in sediment supply such as caused by Fremantle Port breakwaters (south and north mole).
Proximity to cell boundaries As the influence of a local coastal change is strongest in its immediate vicinity, it is possible for the effect of a moderate change to be transferred across a cell boundary. In such a situation, adjacent sediment cells should be assessed simultaneously.
Modification due to engineering works Engineering works may modify the nature of sediment cell boundaries and in some instances, might create new boundaries. An example of modifying the cell boundary has occurred at the causeway to Garden Island (R0D15), where the influence of the rock structure interrupts the mobile sediments on the bank of Southern Flats.
33 Detailed evaluation of coastal behaviour Detailed coastal assessment, including sediment analysis, sediment transport assessment or higher frequency evaluation of coastal configuration may provide better representation of how the sediment cell boundary operates. Cell boundaries may need to be reviewed following such investigations.
Recent work in the Mid-West Region provides an example of how sediment analysis may be used to verify and resolve cell boundaries49. An overview of the study findings is included in the Mid-West Region cells report46. Useful studies in the Vlamingh Region containing previous sediment analysis are referred to in Table B.1 (Appendix B). An example is provided by the relationship between regionally varying oceanography and the resulting shelf sediments in the Vlamingh Region33. Processes affecting the distribution of sediments and variability in sediment supply from nearshore sources in the studies could be investigated to help develop sediment budgets.
Possible studies to further resolve cell boundaries requires consideration of how the cells are to be applied, the time and space scales and the range of landforms within the domain of interest. For example, when assessing over an extended time scale for climate change adaptation assessment, there may be sensitivity to buried rock. A program of seismic surveys could therefore refine the onshore boundary. A second example is where coastal dunes define the onshore boundary of secondary cells, as the degree of dune mobility and the time scale of change will directly affect the area of interest. In this situation, active dune movement may be identified through aerial photograph interpretation or sediment analysis.
Further work to increase the resolution of cell boundaries may involve: 1. Ensuring the temporal and spatial resolution of data are consistent between datasets and fit for purpose at the scale at which they are being applied; 2. Extension of the criteria used to identify the cell boundaries to include criteria describing sediment characteristics and the limits to their distribution; 3. Identification of the potential for change of ambulatory boundaries at a local scale elatedr to projected variation in climate and ocean processes, along with more detailed information of underlying rock structures; 4. Verification of sediment cells through determination of sediment character, composition, depth and distribution; 5. Determination of the contribution of barred estuaries to cell functions; and 6. Revision of cell boundaries in the event of large-scale engineering works, such as ports or harbours, restrict sediment transport at relevant time and space scales.
Proposed modification of cell boundaries should be presented to the dataset custodian, the Western Australian Department of Transport. The modifications should be presented in either ESRI Shapefile format or as Google Earth KMZ files with metadata and supporting documentation. Department of Transport officers will integrate the modifications into the geodatabase if deemed appropriate.
34 References 1 Bowen AJ and Inman DL. (1966) Budget of littoral sands in the vicinity of Point Arguello, California. United States Army CERC Technical Memorandum No. 19. 2 Komar PD. (1996) The budget of littoral sediments, concepts and applications. Shore and Beach. 64 (3): 18 – 26. 3 van Rijn LC. (1998) Principles of Coastal Morphology. Aqua Publications, NL. 4 McGlashan DJ and Duck RW. (2002) The Evolution of Coastal Management Units: Towards the PDMU. Littoral 2002, The Changing Coast. 29-33. 5 Cowell PJ, Stive MJF, Niedoroda AW, de Vriend DJ, Swift DJP, Kaminsky GM and Capobianco M. (2003a) The coastal-tract (Part 1): a conceptual approach to aggregated modeling of low-order coastal change. Journal of Coastal Research, 19 (4): 812-827. 6 Rosati JD. (2005) Concepts in sediment budgets. Journal of Coastal Research, 21(2): 307–322. 7 Cooper NJ & Pontee NI. (2006) Appraisal and evolution of the littoral ‘sediment cell’ concept in applied coastal management: Experiences from England and Wales. Ocean and Coastal Management, 49: 498-510. 8 Whitehouse R, Balson P, Beech N, Brampton A, Blott S, Burningham H, Cooper N, French J, Guthrie G, Hanson S, Nicholls R, Pearson S, Pye K, Rossington K, Sutherland J and Walkden M. (2009) Characterisation and prediction of large scale, long-term change of coastal geomorphological behaviours: Final science report. Science Report SC060074/SR1. Joint DEFRA and Environment Agency Flood and Coastal Erosion Risk Management R & D Programme, Environment Agency and Department for Environment, Food and Rural Affairs, United Kingdom. 9 Inman DL and Frautschy JD. (1966) Littoral processes and the development of shorelines. Proceedings of Coastal Engineering Santa Barbara Specialty Conference, American Society of Civil Engineering, 511–536. 10 Davies JL. (1974) The coastal sediment compartment. Australian Geographical Studies. 12: 139-151. 11 Searle DJ and Semeniuk V. (1985) The natural sectors of the Rottnest Shelf coast adjoining the Swan Coastal Plain. Journal of the Royal Society of Western Australia, 67: 116-136. 12 Griggs GB. (1987) Littoral Cells and Harbour Dredging Along the California Coast. Environmental, Geological and Water Science, 10 (1): 7-20. 13 Motyka JM and Brampton AH. (1993) Coastal Management: Mapping of Littoral Cells. Wallingford UK: HR Wallingford. Hydraulics Research Report SR 328. 14 HR Wallingford. (1997) Coastal cells in Scotland. Scottish Natural Heritage. Research, Survey and Monitoring Report 56. 15 McGlashan DJ and Duck RW. (2000) Undeveloped Coasts: a protocol for the assessment of development potential. Periodicum Biologorum, 102(1):329-332. Cited within McGlashan & Duck (2002). 16 Department for Environment, Food and Rural Affairs: DEFRA. (2006) Shoreline management plan guidance. United Kingdom. www.defra.gov.uk 17 Sanderson PG and Eliot I. (1999) Compartmentalisation of beachface sediments along the southwestern coast of Australia. Marine Geology, 162: 145-164. 18 Stapor FW & May JP. (1983) The cellular nature of littoral drift along the northeast Florida Coast. Marine Geology, 51: 217-237. 19 Carter B. (1988) Coastal environments: an introduction to the physical, ecological, and cultural systems of coastlines, Academic Press, New York. 20 California Coastal Sediment Management Workgroup. (2006) California Coastal Sediment Master Plan Status Report; Draft for Public Review and Comment. California Geological Survey, Santa Rosa CA. 21 MESSINA. (2006) Integrating the Shoreline into Spatial Policies. Practical Guide prepared as part of the Managing European Shorelines and Sharing Information on Nearshore Areas (MESSINA). Prepared by IGN France International, Isle of Wight Council, University of Szczecin, Community of Agglomeration for the Thau Basin and Municipality of Rewal. Produced for European Union. 22 van Rijn LC. (2010) Coastal erosion control based on the concept of sediment cells. Prepared for the 35 European Commission, Concepts and Science for Coastal Erosion Management, Conscience. 22van Rijn LC. (2010) Coastal erosion control based on the concept of sediment cells. Prepared for the European Commission, Concepts and Science for Coastal Erosion Management, Conscience. 23 Eliot M, Stul T & Eliot I. (2013) Revisiting Landforms in Coastal Engineering, In: Proceedings of Coasts & Ports 2013 Conference, Manly, Sydney, 11-13 September 2013. 24 French J and Burningham H. (2009) Mapping the connectivity of large scale coastal geomorphological systems: Coastal system mapping with Cmap Tools tutorial. Science Report SC060074/PR2. Joint DEFRA and Environment Agency Flood and Coastal Erosion Risk Management R and D Programme, Environment Agency and Department for Environment, Food and Rural Affairs, United Kingdom. 25 McLean RF. (2000) Australia’s coastal vulnerability assessment studies: recent upscaling or downscaling? Proceedings of APN/SURVAS/LOICZ Joint Conference on coastal impacts of climate change and adaptation in the Asia-Pacific region, Kobe, Japan, November 14-16, 2000, 29-33. 26 Eliot I, Nutt C, Gozzard B, Higgins M, Buckley E and Bowyer J. (2011) Coastal Compartments of Western Australia: A Physical Framework for Marine and Coastal Planning. Report 80-02. Damara WA Pty Ltd. Report to the Departments of Environment and Conservation, Planning and Transport. Environmental Protection Authority. 27 Richardson L, Mathews E and Heap A. (2005) Geomorphology and Sedimentology of the South West Planning Area of Australia: Review and synthesis of relevant literature in support of Regional Marine Planning. Geoscience Australia Report Record 2005/17. 28 Damara WA Pty Ltd. (2009) The Yalgorup Coast: Binningup to Cape Bouvard, Western Australia. Draft report prepared for the Department of Planning & Department of Conservation and Environment. 29 Stul T. (2005) Physical characteristics of Perth Beaches, Western Australia. Honours Thesis in Environmental Engineering. Centre for Water Research. The University of Western Australia. 30 Damara WA Pty Ltd. (2010) Shire of Busselton Coastal Erosion Study – Assessment of Climate Change Impacts. Prepared for Shire of Busselton. Draft Report 96-01-A. 31 Masselink G and Pattiaratchi CB (2001). Seasonal variation in nearshore processes and beach morphology along the sheltered coastline of Perth, Western Australia. Marine Geology, 172: 242-263. 32 Pattiaratchi C and Eliot M. (2008) Sea Level Variability in South-western Australia: From hours to decades. Proceedings of the 31st ASCE international conference on coastal engineering. Hamburg, Germany. 33 Collins LB. (1988) Sediments and history of the Rottnest Shelf, southwestern Australia: a swell dominated, non-tropical carbonate margin. Sedimentary Petrology, 60: 15–29. 34 Gozzard JR. (2011a) WACoast – Cape Naturaliste to Lancelin. Geological Survey of Western Australia digital dataset. 35 Gozzard JR. (2011b) WACoast –Rottnest Island. Geological Survey of Western Australia digital dataset. 36 Gozzard JR (2011c). Sea to scarp – geology, landscape, and land use planning in the southern Swan Coastal Plain. Geological Survey of Western Australia. 37 Short AD. (2005) Beaches of the Western Australian Coast: Eucla to Roebuck Bay, Sydney University Press, Sydney. 38 Western Australian Planning Commission: WAPC. (2003) ‘Chapter 2 – Coastal Environments’ in Coastal Planning and Management Manual: A community Guide for Protecting and Conserving The Western Australian Coast. WAPC, Perth. 39 Eliot I, Gozzard B, Eliot M, Stul T and McCormack G. (2012) The Coast of the Shires of Gingin and Dandaragan, Western Australia: Geology, Geomorphology & Vulnerability. Damara WA Pty Ltd and Geological Survey of Western Australia, Innaloo, Western Australia. 40 Schwartz ML. (2005) Encyclopedia of Coastal Science. Encyclopedia of Earth Sciences Series. Springer, The Netherlands. 41 LeProvost, Semeniuk & Chalmer. (1986) Sediment sources, transport paths and sinks of the Inner Rottnest Shelf between Bunbury and Rockingham for use in determining volumes of littoral drift past the proposed Dawesville Cut. Draft report R149 prepared for Riedel & Byrne Consulting Engineers. Appendix C to the Dawesville Channel Coastal Engineering Studies.
36 42 Riedel & Byrne. (1987) Dawesville Channel Coastal Engineering Studies: Coastal Processes – An Engineering Assessment. Appendix B. Prepared by Riedel & Byrne Consulting Engineers. 43 Eliot I, Tonts M, Eliot M, Walsh G and Collins J. (2005) Recreational Beach Users in the Perth Metropolitan Area. The Institute of Regional Development. School of Earth and Geographical Sciences. Faculty of Natural and Agricultural Sciences. University of Western Australia. 44 Stul T, Eliot I and Pattiaratchi C (2007). Sediment Cells Along the Perth Metropolitan Coast, In Proceedings of 2007 Coasts and Ports Australasian Conference, Melbourne, Australia, 18–20 July 2007. Engineers Australia, Canberra. 45 Stul T, Gozzard JR, Eliot IG and Eliot MJ (2012) Coastal Sediment Cells between Cape Naturaliste and the Moore River, Western Australia. Report prepared by Damara WA Pty Ltd and Geological Survey of Western Australia for the Western Australian Department of Transport, Fremantle – Superseded by this report. 46 Stul T, Gozzard JR, Eliot IG and Eliot MJ (2014a) Coastal Sediment Cells for the Mid-West Region between the Moore River and Glenfield Beach, Western Australia. Report prepared by Seashore Engineering Pty Ltd and Geological Survey of Western Australia for the Western Australian Department of Transport, Fremantle. 47 Stul T, Gozzard JR, Eliot IG and Eliot MJ (2014b) Coastal Sediment Cells for the Northampton Region between Glenfield Beach and the Murchison River, Western Australia. Report prepared by Seashore Engineering Pty Ltd and Geological Survey of Western Australia for the Western Australian Department of Transport, Fremantle. 48 Stul T, Gozzard JR, Eliot IG and Eliot MJ (2014c) Coastal Sediment Cells for the Pilbara Region between Giralia and Beebingarra Creek, Western Australia. Report prepared by Seashore Engineering Pty Ltd and Geological Survey of Western Australia for the Western Australian Department of Transport, Fremantle. 49 Tecchiato C and Collins LB. (2012) Geraldton Embayments Coastal Sediment Budget Study. Coastal Vulnerability and Risk Assessment Program - Project 2 - Stage 2: Sediment Mapping for Identification of Sediment Sources, Transport Pathways and Sinks for Components of the Batavia Coast, With Special Consideration of the Inshore Waters and Coast between the Greenough River and Buller River. First Year Final Report for the WA Department of Transport, Curtin University, Bentley. Western Australia. 50 MacArthur WM and Bartle GA. (1980) Landforms and soils as an aid to urban planning in the Perth Metropolitan Northwest Corridor, Western Australia. Land Resources Management Series No. 5, CSIRO, Melbourne. 51 Wells MR, Oma VPM and Richards NLB. (1985) Shire of Rockingham – a study of land resources and planning considerations. Department of Agriculture, Western Australia, Technical Report 44. 52 Wells MR and Clarke AJ. (1986) Shire of Wanneroo, a study of land resources and planning considerations. Resource Management Technical Report 47. Department of Agriculture, Western Australia. 1:25,000 soil- landscape maps. 53 Wells MR. (1989) Land capability study of the Shires of Mandurah and Murray. Department of Agriculture, Western Australia, Land Resource Series No. 2. 54 van Gool D. (1990) Land resources in the northern section of the Peel-Harvey catchment, Swan Coastal Plain, Western Australia. Department of Agriculture, Western Australia. 55 Tille P and Lantzke N. (1991) Busselton - Margaret River - Augusta land capability study. Land Resources Series No. 5, Department of Agriculture, Western Australia. 1:50,000 soil-landscape map and report. 56 van Gool D and Kipling B. (1992) Land resources in the southern section of the Peel-Harvey catchment, Swan Coastal Plain, Western Australia. Department of Agriculture, Western Australia. 57 Barnesby BA and Proulx-Nixon ME. (2000) Land resources from Harvey to Capel on the Swan Coastal Plain, Western Australia. Department of Agriculture, Western Australia. 1:50,000 soil-landscape map. 58 Gozzard JR. (2007) Geology and Landforms of the Perth Region. Western Australia. Geological Survey of Western Australia. 59 Semeniuk V and Searle DJ. (1986) Variability of Holocene sealevel history along the southwestern coast of Australia – Evidence for the effect of significant local tectonism. Marine Geology, 72: 47-58.
37 60 Wyrwoll K-H, Zhu ZR, Kendrick GA, Collins LB and Eisenhauser A. (1995) Holocene sea-level events in Western Australia: revisiting old question’. In: CW Finkl (ed.), Holocene cycles: climate, sea level, and coastal sedimentation. Journal of Coastal Research, Special Issue no. 17: 321–326. Coastal Education and Research Foundation. 61 DA Lord and Associates. (1998) Sedimentology of Success and Parmelia Banks, Owen Anchorage, (Western Australia) - Summary Report. For Cockburn Cement Limited. Report no. 95/008/6. 62 Hollings B. (2004) Sediment Dynamics of Warnbro Sound, Western Australia, Unpublished Engineering Honours Thesis. University of Western Australia. 63 Hallermeier RJ. (1981) Seaward Limit of Significant Sand Transport by Waves: An Annual Zonation for Seasonal Profiles. United States Army Corps of Engineers. Coastal engineering technical aid no. 81-2. 64 Searle DJ and Semeniuk V. (1988) Petrology and origin of beach sand along the Rottnest Shelf coast, Southwestern Australia. Journal of the Royal Society of Western Australia, 70(4): 119-128. 65 Oldham CE, Lavery PS, McMahon K, Pattiaratchi CP and Chiffings TW. (2010) Seagrass wrack dynamics in Geographe Bay, Western Australia. Prepared for Department of Transport and Shire of Busselton. 66 Pattiaratchi C and Wijeratne S. (2011) Seagrass dynamics in Geographe Bay, Western Australia. Prepared by the University of Western Australia for the Department of Transport and the Shire of Busselton. 67 Hodgkin EP and Hesp PA (1998). Estuaries to salt lakes: Holocene transformation of the estuarine ecosystems of southwestern Australia. Marine and Freshwater Research, 49: 183-201. 68 Brearley A (2005). Ernest Hodgkin’s Swanland: Estuaries and Coastal Lagoons of Southwestern Australia. University of Western Australia Press, Crawley. 69 Dubczuk LT. (2007) Annual Mechanical Sand Bypassing at the Mandurah Ocean Entrance and Dawesville Channel. In: Proceedings of 2007 Coasts and Ports Australasian Conference, Melbourne, Australia, 18–20 July 2007. Engineers Australia, Canberra. 70 Komar PD. (2005) Hawke’s Bay Environmental Change, Shoreline Erosion & Management Issues. Asset Management Group Technical Report ISSN 1174 3085. Prepared for Napier City Council, Port of Napier Ltd and Hawke’s Bay Regional Council. 71 Lyne V, Fuller M, Last P, Butler A, Martin M & Scott R. (2006) Ecosystem characterisation of Australia’s North West Shelf. North West Shelf Joint Environmental Management Study. Technical Report No. 12. CSIRO. 72 Patsch K and Griggs G. (2006) Littoral cells, sand budgets and beaches: Understanding California’s shoreline. Institute of Marine Sciences, University of California, Santa Cruz. 73 Inman DL and Jenkins SA. (1984) The Nile littoral cell and man’s impact on the coastal zone of the southeastern Mediterranean, In: Proceedings of the 19th Coastal Engineering Conference, American Society of Civil Engineers, 2: 1600-1617. 74 Komar PD. (2010) Shoreline Evolution and Management of Hawke’s Bay, New Zealand: Tectonics, Coastal Processes and Human Impacts. Journal of Coastal Research, 26 (1): 143-156. 75 Eliot M. (2013) Application of Geomorphic Frameworks to Sea-Level Rise Impact Assessment. Prepared for Geoscience Australia by Damara WA Pty Ltd, Report 193-01-Rev0. 76 Thomson GG, Khalil SM & Tate B. (2005) Sediment budgets as an aid for breakwater design: Raccoon Island case study. Proceedings of the 14th Biennial Coastal Zone Conference, New Orleans, Louisiana July 17-21, 2005. 77 Fotheringham D. (2009) Shoreline Erosion at Port Office Rock Near Beachport, South Australia. Coastal Management Branch, Department for Environment and Heritage South Australia, Technical Report 2009/09.
38 Coastal Sediment Cells for the Vlamingh Coast Appendices A to D
39 Appendix A Secondary and Tertiary Cells
40 115°0'0"E 115°5'0"E
LOCATION Moore River Bathymetry mAHD MAP 0 to -10 -10 to -20 PERTH -20 to -50 -50 to -100 Indian Ocean 33°30'0"S 33°30'0"S
Cape Naturaliste Western Australia
1 Cape Naturaliste
1a RO6A
1a
Legend Point Piquet
Primary cell point
Secondary cell point
Tertiary cell point 33°35'0"S 33°35'0"S Primary cell 2a Secondary cell
Tertiary cell Point Daking 2 RO6A Primary cell label
2 Secondary cell label 2b 2a Tertiary cell label
SECONDARY CELL BOUNDARY
Cape Naturaliste
Point Piquet 1
2 3
33°40'0"S Norman 33°40'0"S Road
0 5
Kilometres
115°0'0"E 115°5'0"E
Figure A.1: Secondary and tertiary cells of the Vlamingh Region Figure is at scale of 1:100,000 at A4. A primary cell point is also a secondary and tertiary cell point. A secondary cell point is also a tertiary cell point. This map should not be used for navigation purposes. Bathymetry information suppliedJune 2015; Planby No: 1748-04-01 Department of Transport with depths in metres below Australian Height Datum. Shaded relief model supplied by Geological Survey of WA, Department of Mines and Petroleum. An inset is included for secondary cells not included wholly in any of this series of figures.
41 115°10'0"E 115°15'0"E
SECONDARY Bathymetry mAHD Legend CELL BOUNDARY 0 to -10 Primary cell point 33°30'0"S 33°30'0"S -10 to -20 Secondary cell point Capel River -20 to -50 Tertiary cell point mouth
Primary cell
Secondary cell Point Piquet 3 Tertiary cell 2 RO6A Norman Primary cell label Road
3 Secondary cell label
3a Tertiary cell label
RO6A 33°35'0"S 33°35'0"S
2
2b Point Templar 2c 3
Marybrook 2d 3a
LOCATION Moore River Norman Road MAP
PERTH
r e 33°40'0"S 33°40'0"S v i Indian R Ocean
p
u
n
u
b r Cape a Naturaliste C Western Australia
0 5
Kilometres
115°10'0"E 115°15'0"E
Figure A.2: Secondary and tertiary cells of the Vlamingh Region Figure is at scale of 1:100,000 at A4. A primary cell point is also a secondary and tertiary cell point. A secondary cell point is also a tertiary cell point. This map should not be used for navigation purposes. Bathymetry information suppliedJune 2015; Planby No: 1748-05-01 Department of Transport with depths in metres below Australian Height Datum. Shaded relief model supplied by Geological Survey of WA, Department of Mines and Petroleum. An inset is included for secondary cells not included wholly in any of this series of figures.
42 115°15'0"E 115°20'0"E
SECONDARY Bathymetry mAHD Legend CELL BOUNDARY 0 to -10 Primary cell point -10 to -20 Secondary cell point Capel River -20 to -50 Tertiary cell point mouth
Primary cell
Secondary cell Point Piquet 3 Tertiary cell 2 RO6D Norman Primary cell label Road
9 Secondary cell label
9b Tertiary cell label 33°35'0"S 33°35'0"S RO6A
3
2 3b
Busselton
Marybrook 2d 3a
Norman Road
Vasse
33°40'0"S D 33°40'0"S ive Moore River rs LOCATION ion MAP D ra in PERTH
Indian
Ocean r e iv R
Cape Naturaliste Western Australia e s
s
a
V
0 5
Kilometres
115°15'0"E 115°20'0"E Figure A.3: Secondary and tertiary cells of the Vlamingh Region Figure is at scale of 1:100,000 at A4. A primary cell point is also a secondary and tertiary cell point. A secondary cell point is also a tertiary cell point. This map should not be used for navigation purposes. Bathymetry information suppliedJune 2015; Planby No: 1748-06-01 Department of Transport with depths in metres below Australian Height Datum. Shaded relief model supplied by Geological Survey of WA, Department of Mines and Petroleum. An inset is included for secondary cells not included wholly in any of this series of figures.
43 115°25'0"E 115°30'0"E
LOCATION Moore River MAP
PERTH 4
Indian Ocean
4a 33°30'0"S Cape 33°30'0"S Naturaliste Western Australia Capel River mouth
Capel River RO6A
3d
3
Legend Forrest Beach Primary cell point
33°35'0"S Secondary cell point 33°35'0"S Lud low Tertiary cell point Ri v e r Primary cell
Secondary cell 3c Tertiary cell
RO6A Primary cell label
3 Secondary cell label
3b 3c Tertiary cell label
Wonnerup Bunbury Harbour
4 Bathymetry mAHD 0 to -10 -10 to -20 Capel River 33°40'0"S -20 to -50 3 mouth 33°40'0"S
0 5 Norman Road SECONDARY Kilometres CELL BOUNDARY
115°25'0"E 115°30'0"E
Figure A.4: Secondary and tertiary cells of the Vlamingh Region Figure is at scale of 1:100,000 at A4. A primary cell point is also a secondary and tertiary cell point. A secondary cell point is also a tertiary cell point. This map should not be used for navigation purposes. Bathymetry information suppliedJune 2015; byPlan No: 1748-07-01 Department of Transport with depths in metres below Australian Height Datum. Shaded relief model supplied by Geological Survey of WA, Department of Mines and Petroleum. An inset is included for secondary cells not included wholly in any of this series of figures.
44 115°30'0"E 115°35'0"E
LOCATION Moore River MAP
PERTH
Indian Ocean
Cape Naturaliste Western Australia RO6A
Bathymetry mAHD 0 to -10 -10 to -20 33°25'0"S 33°25'0"S -20 to -50
4
4b Legend
Primary cell point
Secondary cell point
Tertiary cell point Stirling Beach Primary cell 4a Secondary cell
Tertiary cell
RO6A Primary cell label
4 Secondary cell label
4b Tertiary cell label
33°30'0"S 3 33°30'0"S Bunbury Harbour Capel River mouth
C ap el 4
3d
R Capel River iv 3 mouth e r
Norman Road SECONDARY CELL BOUNDARY
0 5
Kilometres
115°30'0"E 115°35'0"E
Figure A.5: Secondary and tertiary cells of the Vlamingh Region Figure is at scale of 1:100,000 at A4. A primary cell point is also a secondary and tertiary cell point. A secondary cell point is also a tertiary cell point. This map should not be used for navigation purposes. Bathymetry information suppliedJune 2015; byPlan No: 1748-08-01 Department of Transport with depths in metres below Australian Height Datum. Shaded relief model supplied by Geological Survey of WA, Department of Mines and Petroleum. An inset is included for secondary cells not included wholly in any of this series of figures.
45 115°35'0"E 115°40'0"E
6 6a Legend Binningup
Primary cell point
Secondary cell point
Tertiary cell point
Primary cell
33°10'0"S Secondary cell 33°10'0"S 5c Tertiary cell
RO6B Primary cell label
5 Secondary cell label
5b Tertiary cell label Buffalo Road
SECONDARY Binningup CELL BOUNDARY 5
RO6B 5
Bunbury Harbour
Capel River 4 Mouth 5b
33°15'0"S 3 33°15'0"S
LOCATION Moore River MAP Leschenault Estuary PERTH
Leschenault South Indian RO6A Ocean
5a
r
e
v Cape Bunbury Harbour i Naturaliste R Western Australia Collie Inner Harbour
Leschenault Bathymetry mAHD
Inlet P 33°20'0"S 33°20'0"S
r e 0 to -10 4 4b s to -10 to -20 n R -20 to -50 iv er
0 5
Kilometres
115°35'0"E 115°40'0"E
Figure A.6: Secondary and tertiary cells of the Vlamingh Region Figure is at scale of 1:100,000 at A4. A primary cell point is also a secondary and tertiary cell point. A secondary cell point is also a tertiary cell point. This map should not be used for navigation purposes. Bathymetry information suppliedJune 2015; Planby No: 1748-09-01 Department of Transport with depths in metres below Australian Height Datum. Shaded relief model supplied by Geological Survey of WA, Department of Mines and Petroleum. An inset is included for secondary cells not included wholly in any of this series of figures.
46 115°35'0"E 115°40'0"E
7 7a
Lake Preston South
RO6B
6b
LOCATION Moore River MAP 33°0'0"S 33°0'0"S PERTH
Myalup North Indian Ocean
Cape Naturaliste Western Australia 6
Bathymetry mAHD 0 to -10 -10 to -20 -20 to -50
Legend
Primary cell point 33°5'0"S 33°5'0"S Secondary cell point 6a Tertiary cell point
Primary cell
Secondary cell
Tertiary cell
RO6B Primary cell label
6 Secondary cell label
6a Tertiary cell label
0 5 Binningup
Kilometres 5 5c
115°35'0"E 115°40'0"E
Figure A.7: Secondary and tertiary cells of the Vlamingh Region Figure is at scale of 1:100,000 at A4. A primary cell point is also a secondary and tertiary cell point. A secondary cell point is also a tertiary cell point. This map should not be used for navigation purposes. Bathymetry information suppliedJune 2015; Planby No: 1748-10-01 Department of Transport with depths in metres below Australian Height Datum. Shaded relief model supplied by Geological Survey of WA, Department of Mines and Petroleum. An inset is included for secondary cells not included wholly in any of this series of figures.
47 115°35'0"E 115°40'0"E
Harvey Estuary
LOCATION Moore River MAP
8b PERTH 32°45'0"S 32°45'0"S Indian Ocean
Lake Clifton North
Cape Naturaliste Western 8 Australia
Bathymetry mAHD 0 to -10 -10 to -20 -20 to -50 8a
Legend
Primary cell point
Secondary cell point
Tertiary cell point 32°50'0"S 32°50'0"S Primary cell Preston Beach North Secondary cell
Tertiary cell
RO6B Primary cell label
8 Secondary cell label
8a Tertiary cell label
SECONDARY Cape CELL BOUNDARY Bouvard RO6B 8 7 7a
Preston Beach 7 North
Lake Preston South
6 32°55'0"S 32°55'0"S
Binningup
0 5
6b 6 Kilometres Lake Preston South
115°35'0"E 115°40'0"E
Figure A.8: Secondary and tertiary cells of the Vlamingh Region Figure is at scale of 1:100,000 at A4. A primary cell point is also a secondary and tertiary cell point. A secondary cell point is also a tertiary cell point. This map should not be used for navigation purposes. Bathymetry information suppliedJune 2015; byPlan No: 1748-11-01 Department of Transport with depths in metres below Australian Height Datum. Shaded relief model supplied by Geological Survey of WA, Department of Mines and Petroleum. An inset is included for secondary cells not included wholly in any of this series of figures.
48 115°35'0"E 115°40'0"E
Legend 10
Primary cell point 32°30'0"S 32°30'0"S
Secondary cell point
Tertiary cell point 10a Primary cell Robert Point Secondary cell
Tertiary cell
y
RO6D Primary cell label r
a
u
t 9 Secondary cell label s E
h
9b Tertiary cell label a 9b r
u
d
n
a
M
9 Peel Inlet 32°35'0"S 32°35'0"S RO6D
Dawesville LOCATION Moore River MAP
PERTH Dawesville Channel Indian Ocean
Cape Naturaliste Western 9a Australia
Harvey Estuary SECONDARY Robert CELL BOUNDARY Point
9 32°40'0"S 32°40'0"S
Cape Bouvard Cape Bouvard
8
Preston Beach Bathymetry mAHD North 0 to -10 RO6B 8b 8 -10 to -20 0 5 -20 to -50 Kilometres
115°35'0"E 115°40'0"E
Figure A.9: Secondary and tertiary cells of the Vlamingh Region Figure is at scale of 1:100,000 at A4. A primary cell point is also a secondary and tertiary cell point. A secondary cell point is also a tertiary cell point. This map should not be used for navigation purposes. Bathymetry information suppliedJune 2015; Planby No: 1748-12-01 Department of Transport with depths in metres below Australian Height Datum. Shaded relief model supplied by Geological Survey of WA, Department of Mines and Petroleum. An inset is included for secondary cells not included wholly in any of this series of figures.
49 115°40'0"E 115°45'0"E
14 14a Safety Bay Legend Mersey Point 12a Primary cell point RO6D 13a Secondary cell point 13 Tertiary cell point Warnbro Primary cell
Secondary cell 32°20'0"S Warnbro Basin 32°20'0"S Tertiary cell 12 RO6E Primary cell label
18 Secondary cell label 12a 18a Tertiary cell label
Cell exclusion area North Becher Point Bathymetry mAHD 0 to -10 11a -10 to -20 11 -20 to -50
Ansteys car park 32°25'0"S 32°25'0"S
10b
RO6C 10
LOCATION Moore River MAP
San Remo PERTH
Indian Ocean
32°30'0"S Cape 32°30'0"S 10a Naturaliste Western Australia 9 9b
Robert Point 0 5 Mandurah Kilometres Estuary
115°40'0"E 115°45'0"E
Figure A.10: Secondary and tertiary cells of the Vlamingh Region Figure is at scale of 1:100,000 at A4. A primary cell point is also a secondary and tertiary cell point. A secondary cell point is also a tertiary cell point. This map should not be used for navigation purposes. Bathymetry information suppliedJune 2015; byPlan No: 1748-13-01 Department of Transport with depths in metres below Australian Height Datum. Shaded relief model supplied by Geological Survey of WA, Department of Mines and Petroleum. An inset is included for secondary cells not included wholly in any of this series of figures.
50 115°40'0"E 115°45'0"E
23 RO6D 21 21a
19 Woodman Point 20 19a GI4 20a
Australian Maritime Complex GI4d Beacon Head Woodman Entrance Point Point Groyne GI4e GI4c Second Head
32°10'0"S GI4f Dance 32°10'0"S Head
GI1a Armaments 18a Point Atwick 18 Jetty
RO6D Cliff GI4b Point RO6E Garden Island
Buache Bay GI1 GI1b Bathymetry mAHD 0 to -10 GI4a -10 to -20 GI2 Colpoys Point James Point GI4 -20 to -50 Parkin Point GI2a Parkin Point Spit Legend Baudin Primary cell point Point 17 Collie GI3 GI3a 32°15'0"S Secondary cell point Head 17a 32°15'0"S 14d Tertiary cell point 15 Cape 15a Primary cell Peron LOCATION Moore River 14c Secondary cell 16 16a MAP Tertiary cell Garden PERTH Bird Island Island Palm Beach RO6E Primary cell label 14 causeway Rockingham 14b 18 Secondary cell label Seal Island Indian RO6D Ocean 18a Tertiary cell label 14a Cell exclusion area Safety Bay 12a
Mersey Point 12 Cape 0 5 Naturaliste 13 13a Western Australia Kilometres Warnbro Basin
115°40'0"E 115°45'0"E
Figure A.11: Secondary and tertiary cells of the Vlamingh Region Figure is at scale of 1:100,000 at A4. A primary cell point is also a secondary and tertiary cell point. A secondary cell point is also a tertiary cell point. This map should not be used for navigation purposes. Bathymetry information suppliedJune 2015; Planby No: 1748-14-01 Department of Transport with depths in metres below Australian Height Datum. Shaded relief model supplied by Geological Survey of WA, Department of Mines and Petroleum. An inset is included for secondary cells not included wholly in any of this series of figures.
51 115°40'0"E 115°45'0"E
Empire LOCATION Moore River Avenue Legend MAP
Primary cell point PERTH Secondary cell point
Tertiary cell point 26b Indian Primary cell Ocean North Secondary cell Swanbourne pipe Tertiary cell Cape 26 Naturaliste RO6D Primary cell label Western Australia 26a 22 Secondary cell label
22a Tertiary cell label
0 5
Kilometres Mudurup Rocks 32°0'0"S 32°0'0"S Bathymetry mAHD 25 0 to -10 25b -10 to -20
-20 to -50 RO6F er Riv Leighton salient
25a RI4
n RO6D a w S
RI1 South Mole Fremantle 24
22 22a
Catherine Point 32°5'0"S 32°5'0"S
23
21 21a
Woodman 19 Point Groyne 20 19a 20a GI4 Australian Woodman Maritime RO6E Point 18 18a Complex
115°40'0"E 115°45'0"E
Figure A.12: Secondary and tertiary cells of the Vlamingh Region Figure is at scale of 1:100,000 at A4. A primary cell point is also a secondary and tertiary cell point. A secondary cell point is also a tertiary cell point. This map should not be used for navigation purposes. Bathymetry information suppliedJune 2015; Planby No: 1748-15-01 Department of Transport with depths in metres below Australian Height Datum. Shaded relief model supplied by Geological Survey of WA, Department of Mines and Petroleum. An inset is included for secondary cells not included wholly in any of this series of figures.
52 115°35'0"E 115°40'0"E
SECONDARY LOCATION Moore River CELL BOUNDARY MAP Bathymetry mAHD 0 to -10 PERTH -10 to -20 North Point -20 to -50
Phillip Point Indian RI4 31°55'0"S Ocean 31°55'0"S 24 Parker RI1 Point
23 Cape RO6F Naturaliste Western Australia
RI4a
Bathurst Point
RI4b Rottnest Philip Point 32°0'0"S Island 32°0'0"S
RI1a RI4
RO6F Bickley Point RI1 RI1b Parker Point
Legend
Primary cell point
Secondary cell point RO6D
Tertiary cell point 24 Primary cell
Secondary cell
Tertiary cell
32°5'0"S RO6D Primary cell label 32°5'0"S
RI1 Secondary cell label 23 RI1b Tertiary cell label
0 5
Kilometres
115°35'0"E 115°40'0"E
Figure A.13: Secondary and tertiary cells of the Vlamingh Region Figure is at scale of 1:100,000 at A4. A primary cell point is also a secondary and tertiary cell point. A secondary cell point is also a tertiary cell point. This map should not be used for navigation purposes. Bathymetry information suppliedJune 2015; Planby No: 1748-16-01 Department of Transport with depths in metres below Australian Height Datum. Shaded relief model supplied by Geological Survey of WA, Department of Mines and Petroleum. An inset is included for secondary cells not included wholly in any of this series of figures.
53 115°30'0"E 115°35'0"E
SECONDARY Legend CELL BOUNDARY Bathymetry mAHD 0 to -10 Primary cell point -10 to -20 Secondary cell point North Point -20 to -50 Tertiary cell point Phillip Point
31°55'0"S Primary cell RI4 31°55'0"S 24 Secondary cell Parker RI1 Point Tertiary cell 23 RO6D Primary cell label
RI3 Secondary cell label
RI3a Tertiary cell label
North Point RI4a RI3c
RI3 Bathurst RI4 Abraham RI3b Point Point RI4b Philip Point Rottnest Island 32°0'0"S RI3a 32°0'0"S Rocky Bay RI1a RI1
Bickley Point
RI2b Kitson RI1b South Point RI2 Point RI2a Parker Point Cape Vlamingh RI2c
LOCATION Moore River MAP
PERTH RO6D
Indian Ocean 32°5'0"S 32°5'0"S
Cape Naturaliste Western Australia
0 5
Kilometres
115°30'0"E 115°35'0"E
Figure A.14: Secondary and tertiary cells of the Vlamingh Region Figure is at scale of 1:100,000 at A4. A primary cell point is also a secondary and tertiary cell point. A secondary cell point is also a tertiary cell point. This map should not be used for navigation purposes. Bathymetry information suppliedJune 2015; Planby No: 1748-17-01 Department of Transport with depths in metres below Australian Height Datum. Shaded relief model supplied by Geological Survey of WA, Department of Mines and Petroleum. An inset is included for secondary cells not included wholly in any of this series of figures.
54 115°40'0"E 115°45'0"E
28a RO6G LOCATION Moore River Legend MAP
Primary cell point 28 PERTH Secondary cell point 27c Pinnaroo Point Tertiary cell point 27c Indian Primary cell Ocean
Secondary cell Hillarys Marina
Tertiary cell 27b 31°50'0"S 27 Cape 31°50'0"S South Sorrento Naturaliste RO6F Primary cell label Western Australia 26 Secondary cell label
26b Tertiary cell label 27a
SECONDARY CELL BOUNDARY 28 Trigg Pinnaroo Point 27
26d Trigg
Mudurup Rocks 26 RO6F Brighton Road
RI4 25 26c
31°55'0"S 0 5 Empire Avenue 31°55'0"S
Kilometres
Bathymetry mAHD 26b 0 to -10 26 -10 to -20 -20 to -50 north Swanbourne pipe
26a
RO6D RI4 Mudurup Rocks 25 32°0'0"S 32°0'0"S S wan Ri 25b ver
115°40'0"E 115°45'0"E
Figure A.15: Secondary and tertiary cells of the Vlamingh Region Figure is at scale of 1:100,000 at A4. A primary cell point is also a secondary and tertiary cell point. A secondary cell point is also a tertiary cell point. This map should not be used for navigation purposes. Bathymetry information suppliedJune 2015; Planby No: 1748-18-01 Department of Transport with depths in metres below Australian Height Datum. Shaded relief model supplied by Geological Survey of WA, Department of Mines and Petroleum. An inset is included for secondary cells not included wholly in any of this series of figures.
55 115°40'0"E 115°45'0"E
LOCATION Moore River MAP Legend
29c Primary cell point PERTH Secondary cell point
Tertiary cell point Indian Quinns Rock N Ocean Primary cell
Secondary cell
Tertiary cell Cape 29b Naturaliste Western RO6G Primary cell label
31°40'0"S Australia 31°40'0"S 29 29 Secondary cell label
29b Tertiary cell label 29a
Yanchep Mindarie Keys N 30
Burns 29 Beach salient RO6G 29a
28
Burns Beach salient Pinnaroo Point
SECONDARY 27 Trigg CELL BOUNDARY 28b
31°45'0"S 28 31°45'0"S
south of Ocean Reef Marina
28a
Pinnaroo Point
Bathymetry mAHD 27c
0 to -10 27c -10 to -20 RO6F -20 to -50 Hillarys Marina
27 27b 31°50'0"S 31°50'0"S 0 5 South Sorrento
Kilometres 27a
115°40'0"E 115°45'0"E
Figure A.16: Secondary and tertiary cells of the Vlamingh Region Figure is at scale of 1:100,000 at A4. A primary cell point is also a secondary and tertiary cell point. A secondary cell point is also a tertiary cell point. This map should not be used for navigation purposes. Bathymetry information suppliedJune 2015; Planby No: 1748-19-01 Department of Transport with depths in metres below Australian Height Datum. Shaded relief model supplied by Geological Survey of WA, Department of Mines and Petroleum. An inset is included for secondary cells not included wholly in any of this series of figures.
56 115°35'0"E 115°40'0"E
LOCATION Moore River RO6I MAP Legend 32a Primary cell point Mallee Reef PERTH Salient Secondary cell point
32 Tertiary cell point Indian Ocean Primary cell 31a Secondary cell
Tertiary cell Cape 31 Naturaliste Western RO6H Primary cell label Australia Wreck Point 30 Secondary cell label 31°30'0"S 31°30'0"S
30b Tertiary cell label
Moore River 30b 1
Yanchep headland N 32
Mallee Reef salient 30 31 Wreck Point
30a 30
Yanchep
RO6H Yanchep SECONDARY CELL BOUNDARY 29 31°35'0"S 31°35'0"S
29d
Alkimos
29 29c
Bathymetry mAHD 0 to -10 RO6G Quinns Rock N -10 to -20 -20 to -50
29b
0 5 31°40'0"S 31°40'0"S Kilometres
115°35'0"E 115°40'0"E
Figure A.17: Secondary and tertiary cells of the Vlamingh Region Figure is at scale of 1:100,000 at A4. A primary cell point is also a secondary and tertiary cell point. A secondary cell point is also a tertiary cell point. This map should not be used for navigation purposes. Bathymetry information suppliedJune 2015; Planby No: 1748-20-01 Department of Transport with depths in metres below Australian Height Datum. Shaded relief model supplied by Geological Survey of WA, Department of Mines and Petroleum. An inset is included for secondary cells not included wholly in any of this series of figures.
57 115°30'0"E 115°35'0"E
LOCATION Moore River RO7A Bathymetry mAHD MAP 0 to -10 1 -10 to -20 PERTH -20 to -50 31°20'0"S 31°20'0"S
Indian Guilderton N Ocean R oore iver 32d M
Moore River Cape Naturaliste 32d Western Australia Guilderton S
32c
32
Legend Wilbinga Rocks
31°25'0"S Primary cell point 31°25'0"S
Secondary cell point 32b
Tertiary cell point RO6I Wilbinga Primary cell
Secondary cell
Tertiary cell 32a
RO6H Primary cell label
30 Secondary cell label Mallee Reef Salient 30b Tertiary cell label
Moore River
1 31a
32 31 Mallee Reef salient Wreck Point 31°30'0"S 31 Wreck Point 31°30'0"S
30 30b Yanchep
SECONDARY CELL BOUNDARY 29 30
0 5 RO6H Kilometres
115°30'0"E 115°35'0"E
Figure A.18: Secondary and tertiary cells of the Vlamingh Regionn Figure is at scale of 1:100,000 at A4. A primary cell point is also a secondary and tertiary cell point. A secondary cell point is also a tertiary cell point. This map should not be used for navigation purposes. Bathymetry information suppliedJune 2015; Planby No: 1748-21-01 Department of Transport with depths in metres below Australian Height Datum. Shaded relief model supplied by Geological Survey of WA, Department of Mines and Petroleum. An inset is included for secondary cells not included wholly in any of this series of figures.
58 Appendix B Data sets Table B.1: Data Sources used for determining cell boundaries in the Vlamingh Region Source Dataset • Geological and geomorphological information and photographs contained in the WACoast1 database. Context • Sediment information, with some examples provided in cited references2 .
• Bathymetry: Department of Transport nearshore and inshore LiDAR, Department of Transport (previously Department of Marine and Harbours) nautical charts and Department of Planning polygons derived from Department of Transport nautical charts. The LiDAR imagery was captured in 2009 and provides bathymetric detail at 5m grid spacing to approximately 25m below MSL3. All depths use the vertical datum of Australian Height Datum (AHD). Alternative information could have been used, however it was generally of a larger spatial resolution than needed, with reduced spatial accuracy. These datasets include the Australian Navy hydrographic charts, Geoscience Australia bathymetry, General Bathymetric Chart of the Oceans (GEBCO) bathymetry.
• Topography: Geological Survey of Western Australia shaded relief model derived from the Landgate high-resolution digital elevation model. Alternative sources include Department of Water onshore LiDAR, Landgate topographic contours and spot heights. Remotely sensed • Vertical aerial imagery: Landgate orthophotography from 2006-2008. Satellite imagery could be an alternative information source, but datasets is generally of reduced spatial resolution and accuracy. • Historic coastal change: Department of Transport shoreline movement plots4, including plan books DPI433, DPI67, DPI568, DPI374, DPI567 and DPI351. Historic aerial imagery can also provide context for coastal change, including recent changes identified by the time-series available through NearMap or Google Earth.. • Shoreline: The shoreline used as the basis for mapping is the Mean High Water Mark (MHWM) to 2006 prepared by Landgate and used by the Department of Environment and Conservation as the basis for the coastal compartment mapping5. This dataset is based on a combination of the cadastral and topographic coasts and is updated in areas as required based on government priority. It is unlikely to represent the location of the MHWM in 2006.
• Rivers: 1:1M and 1:250k scale rivers by the Department of Water.
• Digital dataset of the Holocene dunes and other landforms at 1:20,000 scale to 3km inland of Landgate MHWM to 2006 as part of WACoast datasets1, unpublished digital datasets of landforms at 1:20,000 scale compiled in 1985-1987 by the Geological Survey of Landform Western Australia and the Quindalup Q4 category6. mapping • Heads up digitising of foredunes, frontal dunes or the foreshore reserve at the 1:2000-scale..
• 1:100k geology maps (GSWA) show the Holocene extent for primary cell onshore boundaries.
• AUSLIG. (1993) Topographic Series, 1:100 000 Map Sheets for Western Australia. Commonwealth Government, Canberra. Naming • Geological Survey of Western Australia. (2007) Atlas of 1:250 000 Geological Series Map Images.. conventions • Department of Transport nautical charts and Australian Navy hydrographic charts.
(Footnotes) 1 Gozzard JR. (2011a) WACoast – Cape Naturaliste to Lancelin. Geological Survey of Western Australia digital dataset. Gozzard JR. (2011b) WACoast – Rottnest Island. Geological Survey of Western Australia digital dataset. 2 Semeniuk V and Johnson DP. (1982) Recent and Pleistocene Beach/Dune Sequences, Western Australia. Sedimentary Geology. 32: 301-328, Semeniuk V and Searle DJ. (1986a) The Whitfords Cusp – its geomorphology, stratigraphy and age structure. Journal of the Royal Society of Western Australia, 68 (2): 29-36. Collins LB. (1988) Sediments and history of the Rottnest Shelf, southwestern Australia: a swell dominated, non-tropical carbonate margin. Sedimentary Petrology, 60: 15–29. Searle DJ and Semeniuk V. (1988) Petrology and origin of beach sand along the Rottnest Shelf coast, Southwestern Australia. Journal of the Royal Society of Western Australia, 70(4): 119-128. DA Lord and Associates. (1998) Sedimentology of Success and Parmelia Banks, Owen Anchorage, (Western Australia) - Summary Report. For Cockburn Cement Limited. Report no. 95/008/6. Richardson L, Mathews E and Heap A. (2005) Geomorphology and Sedimentology of the South West Planning Area of Australia: Review and synthesis of relevant literature in support of Regional Marine Planning. Geoscience Australia Report Record 2005/17. Stul T. (2005) Physical characteristics of Perth Beaches, Western Australia. Honours Thesis in Environmental Engineering. Centre for Water Research. The University of Western Australia. 3 Fugro LADS Corporation (2009). Report of Survey, Western Australia, Two Rocks to Cape Naturaliste: Bathymetry and Seabed Survey, LiDAR. April/May 2009, Adelaide, Australia. 4 Public Works Department, Department for Planning and Infrastructure and Department of Transport coastline movement or shoreline movement plots are now summarised in a database: https://mapsengine.google.com/09372590152434720789-17447516222354999649-4/ mapview/?authuser=0 5 Eliot I, Nutt C, Gozzard B, Higgins M, Buckley E and Bowyer J. (2011) Coastal Compartments of Western Australia: A Physical Framework for Marine and Coastal Planning. Report 80-02. Damara WA Pty Ltd. Report to the Departments of Environment and Conservation, Planning and Transport. Environmental Protection Authority. 6 MacArthur WM and Bartle GA. (1980) Landforms and soils as an aid to urban planning in the Perth Metropolitan Northwest Corridor, Western Australia. Land Resources Management Series No. 5, CSIRO, Melbourne.
59 Appendix C Regional variation in criteria Table C.1: Comparison of cell criteria for the Vlamingh, Mid-West and Pilbara Regions The same criteria apply for Mid-West and Northampton Regions. All reference to Mid-West Region should be read as Mid-West and Northampton Regions.
Vlamingh Region compared to Mid-West Region Vlamingh Region compared to Pilbara Region
Same criteria used for Vlamingh and Mid-West Regions. Same criteria used for Vlamingh and Pilbara Regions, except engineering structures did not define any primary beachface points in the Pilbara. Vlamingh cells were defined based on changes in land systems and the
point geological framework. Pilbara cells were frequently defined to include areas
Beachface with likely sediment supply by individual river systems, incorporating whole deltas within broader cells.
Offshore boundaries for the Mid-West have one criterion per Offshore boundaries of cells in the Pilbara Region are related to tidal cell level corresponding to depths of -30m AHD for primary reworking of sediment and waves, whereas waves are the primary process cells, -15m AHD for secondary cells and -5m AHD for tertiary for cells in the Vlamingh Region. One consequence of this difference is cells. offshore boundaries generally occur at shallower depths for the Pilbara The Vlamingh Region has multiple depth criteria for offshore Region in areas where tidal reworking and extreme waves provide the boundaries at secondary and tertiary cell levels due to dominant environmental forcing. sheltering by continuous ridgelines of elongate reefs, large The Vlamingh Region has multiple depth criteria for offshore boundaries at offshore islands, large sediment banks and basins. secondary and tertiary cell levels due to sheltering by continuous ridgelines of elongate reefs, large offshore islands within primary cell offshore boundaries, large sediment banks and basins.
boundary Marine sections of the alongshore boundaries were mapped Marine sections of the alongshore boundaries in the Vlamingh Region as orthogonal to the coast in the Mid-West Region where are fixed by toes of Holocene sediment banks, submerged rock outcrops limited bathymetric information was available, with more and islands and follow lines of sediment transport convergence on banks detailed bathymetry available for the Vlamingh Region. and reefs. Marine sections cannot be easily resolved in the Pilbara Region Mapping the toe of Holocene sediment banks in the Vlamingh due to extensive tidal reworking of sediments from multiple rivers across Region is not included for the Mid-West Region. the broad nearshore area, combined with limited bathymetric information. Marine sections were often not orthogonal to the coast, but were skewed in the direction of the dominant current or wave forcing following high points in Offshore boundaries and marine section of the alongshore boundaries and marine section of the alongshore Offshore the bathymetry or ridge lines of islands.
The Vlamingh Region is the most densely populated area The Vlamingh and Pilbara coasts have been modified in densely populated of the Western Australian coast with extensive coastal or industrialised areas. The physical extent of the engineered structures modifications. Hence more criteria for onshore boundaries and reclaimed land in the Pilbara tends to not extend beyond the area of and the terrestrial section of alongshore boundaries are the majority of tidal reworking of riverine sediments. Therefore engineering related to engineering works. works tend to be excluded as criteria for onshore boundaries and terrestrial sections of alongshore boundaries in the Pilbara.
Natural onshore boundaries of cells in the Vlamingh Region Natural onshore boundaries for primary cells in the Pilbara Region are are mainly the landward extent of Holocene land systems. linked to elevation contours for the extensive systems of outwash plains, Two exceptions are included for the Mid-West Region to with Holocene land systems used in the Vlamingh Region. Onshore ensure exclusion of dunes without a connection to the boundaries for secondary and tertiary cell scales in the Pilbara Region relate coast and inclusion of dunes abutting rocky topography to to the landward extent of supratidal landforms and inter-tidal landforms landward, such as colluvial foot slopes and cliffs. respectively, excluding the presence of dunes, cliffs and engineered coasts.
alongshore boundary alongshore Terrestrial sections of the alongshore boundaries also include Terrestrial sections of the alongshore boundaries are defined in the discontinuities in large mobile dunes or narrow dune barriers Vlamingh Region by discontinuities in dune barriers and large landforms, or for the Mid-West Region. following the centerline of an engineered structure. The terrestrial sections cannot easily be resolved in the Pilbara Region due to extensive marine and
Onshore boundaries and terrestrial section of the boundaries and terrestrial Onshore fluvial interactions at multiple scales over the low-lying topography. Most frequently the boundary was mapped to ridgelines and connecting high points that separate basins.
60 Appendix D Beachface points and cell boundary information
Table D.1: Rationale for selection of primary cell beachface points in the Vlamingh Region Co-ordinates in Latitude and Longitude rounded to 3 decimal places
Beachface Point Associated Lat. Long. Other Alongshore Boundary Beachface Point Primary Name Boundaries Character Cells
Rock structure restricting sediment transport Moore River -31.353 115.499 2° Zone, Ambulatory, Open at a decadal scale; R06I, R07A Geomorphic feature (Moore River channel)
Rock structure restricting sediment transport Mallee Reef salient -31.464 115.564 2°, 3° Zone, Fixed, Open at a decadal scale; R06H, R06I Geomorphic feature (salient)
Geomorphic feature (onshore feed and Yanchep -31.563 115.633 2°, 3° Zone, Ambulatory, Open R06G, R06H discontinuity in dune system)
Geomorphic feature (cuspate foreland); Pinnaroo Point -31.804 115.729 2°, 3° Zone, Ambulatory, Open Adjacent cells have a different shoreline R06F, R06G aspect restricting sediment transport at a decadal scale
South Mole Engineered structure (South Mole Fremantle -32.056 115.732 2°, 3° Point, Fixed, Closed R06D, R06F Fremantle and dredged channel)
Geomorphic feature (end of Parmelia Bank/ Woodman Point start of Cockburn Sound); -32.137 115.744 2°, 3° Point, Fixed, Closed R06D, R06E groyne Engineered structure (groyne and reclaimed peninsular)
Geomorphic feature (end of Southern Flats); Palm Beach -32.277 115.721 2°, 3° Point, Fixed, Open Adjacent cells have a different shoreline R06D, R06E Rockingham aspect restricting sediment transport at a decadal scale
Rock structure restricting sediment transport Second Head -32.165 115.675 3° Point, Fixed, Open at a decadal scale; R06D, R06E Geomorphic feature (Parmelia Bank edge)
Geomorphic feature (old spit); Parkin Point -32.241 115.693 2° Point, Fixed, Open Adjacent cells have a different shoreline R06D, R06E aspect restricting sediment transport at a decadal scale
Geomorphic feature (northern end of high Warnbro -32.327 115.742 - Zone, Fixed, Open R06C, R06D dunes); (note: point of divergence)
Geomorphic feature (salient); Cape Bouvard -32.685 115.607 2°, 3° Zone, Fixed, Open Adjacent cells have a different shoreline R06B, R06C aspect restricting sediment transport at a decadal scale
Rock structure restricting sediment transport at a decadal scale; Adjacent cells have a different shoreline Bunbury Harbour -33.300 115.646 2°, 3° Point, Fixed, Open R06A, R06B aspect restricting sediment transport at a decadal scale; Engineered structure
Rock structure restricting sediment transport at a decadal scale; Last cell in Cape Naturaliste -33.532 115.003 2°, 3° Point, Fixed, Open Adjacent cells have a different shoreline region R05, aspect restricting sediment transport at a R06A decadal scale
61 62 boundaries intheVlaminghRegion Table D.2:Rationaleforselectionofprimarycellonshore, offshore andalongshore “From” Alongshore Boundary “To” Alongshore Boundary Offshore Onshore Primary Cell Boundary Boundary Point Marine Section Terrestrial Section Point Marine Section Terrestrial Section
-30m AHD isobath Broad area of Deepest point of Boundary of, or R06I. Landward extent Boundary of, or farthest from shore Mallee Reef sediment transport depression or contour discontinuity in, Mallee Reef salient to of Holocene land discontinuity in, a Moore River (seaward of shore salient convergence (high reentrant (Moore River a Holocene land Moore River systems Holocene land system parallel ridge) point of Mallee Reef) palaeochannel) system
Broad area of sediment transport -30m AHD isobath convergence (high Centreline of Broad area of Boundary of, or R06H. Landward extent farthest from shore point of Hugill Reef); engineered structure Mallee Reef sediment transport discontinuity in, Yanchep to Mallee of Holocene land Yanchep (seaward of shore or feature (edge of car salient convergence (high a Holocene land Reef salient systems Deepest point parallel ridge) of depression park, Section 3) point of Mallee Reef) system (depression in two offshore ridges)
Landward extent of Holocene land systems; Landgate MHWM to Broad area of 2006 for moderately sediment transport to high cliffed coasts Broad area of convergence (high Boundary of, or R06G. without dunes (north sediment transport Boundary of, or -30m AHD isobath Pinnaroo point of Hugill Reef); discontinuity in, Pinnaroo Point to of Ocean Reef convergence (ridge of discontinuity in, a Yanchep farthest from shore Point a Holocene land Yanchep Marina); Lal Bank and offshore Holocene land system Deepest point of system reefs) depression or contour Landgate MHWM to reentrant (depression 2006 on engineered in two offshore ridges) coasts with shore parallel structures without dunes to landward (Mindarie)
Landward extent of Holocene land Broad area of systems; Deepest point of Boundary of, or R06F. Central ridge line for sediment transport -30m AHD isobath South Mole depression or contour discontinuity in, South Mole Fremantle Landgate MHWM to an island (Garden Pinnaroo Point convergence (ridge of farthest from shore Fremantle reentrant (Swan River a Holocene land to Pinnaroo Point 2006 for moderately Island, Section 2) Lal Bank and offshore palaeochannel) system to high cliffed coasts reefs) without dunes (Trigg to South Sorrento)
An extension of marine section and R06E. beachface point directly to the onshore Cockburn Sound Centreline of (Section 1: Mainland Landward extent Toe of Holocene boundary if there is Palm Beach Toe of Holocene engineered structure from Palm Beach of Holocene land sediment bank no change in land Woodman Point No boundary; Basin Rockingham sediment bank or feature (edge of Rockingham to systems (Section1); (Southern Flats system between groyne (Section within Cockburn (Section 1), (Parmelia Bank for car park, Section 1); Woodman Point Central ridge line for for Section 1 and adjacent cells (E-W 1), Parkin Point Sound Second Head Section 1, Southern Central ridge line for groyne, Section 2: an island (Garden Parmelia Bank for line picked as part of (Section 2) (Section 2) Flats for Section 2) an island (Garden Garden Island east Island, Section 2) Section 2) Rockingham-Becher from Second Head to Plain, Section 1); Island, Section 2) Parking Point) Central ridge line for an island (Garden Island, Section 2) “From” Alongshore Boundary “To” Alongshore Boundary Offshore Primary Cell Onshore Boundary Boundary Terrestrial Terrestrial Point Marine Section Section Point Marine Section Section
An extension of Landward extent An extension of R06D. marine section of Holocene land marine section Warnbro to South Mole and beachface systems (Section Toe of Holocene and beachface Fremantle including point directly to the 1, Section 3 also sediment bank (toe point directly to the Rottnest Island and Toe of Holocene onshore boundary if including an old of North Sands for onshore boundary if excluding Cockburn sediment bank there is no change in shoreline in the Section 1, Southern there is no change in Sound (Section 1: (Southern Flats for land system between -30m AHD isobath northern extent); Flats for Section 2 land system between Palm Beach Southern from Warnbro Section 1, Parmelia adjacent cells (E-W farthest from Central ridge line for Warnbro (Section 1), and Parmelia Bank adjacent cells Rockingham (Section to Palm Beach Bank for Section 2); line picked as part of shore (immediately an island (Garden Parkin Point (Section for Section 3); (through high point in 1), Second Head Rockingham, Section 2: Deepest point Rockingham-Becher seaward of Island, Section 2); 2), Woodman Point Deepest point dunes, Section 1); (Section 2), South Garden Island west to of depression or Plain, Section 1); continuous shore Landgate MHWM to groyne (Section 3) of depression or Mole Fremantle Second Head, Success Central ridge line for contour reentrant parallel ridge) 2006 on engineered contour reentrant (Section 3 Central ridge line for and Parmelia Banks west an island (Garden (Swan River coasts with shore (gap between North an island (Garden of the shipping channel Island, Section 2); palaeochannel, parallel structures and South Sands in Island, Section 2); & Rottnest Island, Centreline of Section 3) without dunes to lee of Coventry Reef, Boundary of, or Section 3: Northern from engineered structure landward (Challenger Section 1) discontinuity in, Woodman point groyne or feature (edge of to South Mole, a Holocene land to South Mole Fremantle) car park, Section 3) Section 3) system (Section 3)
Toe of Holocene An extension of sediment bank (toe marine section -30m AHD isobath of North Sands); and beachface farthest from Broad area of Boundary of, or point directly to the R06C. Landward extent shore (immediately sediment transport discontinuity in, Deepest point onshore boundary if Cape Bouvard to of Holocene land Cape Bouvard Warnbro seaward of convergence (lee of a Holocene land of depression or there is no change in Warnbro systems continuous shore unnamed reef) system contour reentrant land system between parallel ridge) (gap between North adjacent cells and South Sands in (through high point in lee of Coventry Reef) dunes)
Landward extent of Holocene land Deepest point Boundary of, or Broad area of Boundary of, or R06B. -30m AHD isobath systems (small of depression or discontinuity in, sediment transport discontinuity in, Bunbury Harbour to farthest from shore section of made Bunbury Harbour contour reentrant Cape Bouvard a Holocene land convergence (lee of a Holocene land Cape Bouvard (on inner shelf plain) ground used on (Collie River system unnamed reef) system Estuary Drive in palaeochannel) Bunbury)
An extension of marine section and beachface Deepest point Boundary of, or R06A. -30m AHD isobath Landward extent Broad area of point directly to the of depression or discontinuity in, Cape Naturaliste to farthest from shore of Holocene land Cape Naturaliste sediment transport onshore boundary if Bunbury Harbour contour reentrant a Holocene land Bunbury Harbour (on inner shelf plain) systems convergence there is no change in (Collie River system land system between palaeochannel) adjacent cells (orthogonal to coast) 63 64 Co-ordinates inLatitudeandLongituderoundedto3decimalplaces Table D.3:RationaleforselectionofsecondarycellbeachfacepointsintheVlaminghRegion Beachface Point Other Alongshore Boundary Associated Name Lat. Long. Boundaries Character Beachface Point Secondary Cells
Rock structures restricting sediment transport at an annual scale; Moore River -31.353 115.499 1° Zone, Ambulatory, Open R06I32, R07A1 Geomorphic feature (Moore River channel)
Rock structures restricting sediment transport at an annual scale; Mallee Reef salient -31.464 115.564 1°, 3° Zone, Fixed, Open R06H31, R06I32 Geomorphic feature (salient)
Rock structures restricting sediment transport at an annual scale; Wreck Point -31.503 115.585 3° Point, Ambulatory, Open R06H30, R06H31 Geomorphic feature (salient)
Yanchep -31.563 115.633 1°, 3° Zone, Ambulatory, Open Geomorphic feature (onshore feed and discontinuity in dune system) R06G29, R06H30
Rock structures restricting sediment transport at an annual scale; Burns Beach Salient -31.717 115.708 3° Zone, Ambulatory, Open R06G28, R06G29 Geomorphic feature (salient)
Geomorphic feature (cuspate foreland); Pinnaroo Point -31.804 115.729 1°, 3° Zone, Ambulatory, Open Adjacent cells have a different shoreline aspect restricting sediment transport at an R06F27, R06G28 annual scale
Rock structures restricting sediment transport at an annual scale; Trigg -31.876 115.751 3° Point, Fixed, Open R06F26, R06F27 Geomorphic feature (salient)
Rock structures restricting sediment transport at an annual scale; Mudurup Rocks -31.997 115.751 3° Point, Fixed, Open Geomorphic feature (salient); R06F25, R06F26 Engineered structure or dredged channel (Cottesloe groyne)
Engineered structure or dredged channel (South Mole Fremantle and dredged South Mole Fremantle -32.056 115.732 1°, 3° Point, Fixed, Closed R06D22, R06F25 channel)
Geomorphic feature (salient); Adjacent cells have a different shoreline aspect restricting sediment transport at an Catherine Point -32.085 115.751 3° Point, Fixed, Open R06D21, R06D22 annual scale; Engineered structure or dredged channel (Catherine Point groyne)
Woodman Point -32.135 115.737 3° Point, Fixed, Open Engineered structure or dredged channel (WAPET groyne) R06D20, R06D21
Geomorphic feature (end of Parmelia Bank/start of Cockburn Sound); Woodman Point groyne -32.137 115.744 1°, 3° Point, Fixed, Closed R06E19, R06D20 Engineered structure or dredged channel (groyne and reclaimed peninsular)
Geomorphic feature (southern end of Parmelia Bank); Australian Maritime Adjacent cells have a different shoreline aspect restricting sediment transport at an -32.140 115.761 3° Point, Fixed, Closed R06E18, R06E19 Complex annual scale; Engineered structure or dredged channel (AMC)
Geomorphic feature (salient); Adjacent cells have a different shoreline aspect restricting sediment transport at an James Point -32.227 115.756 3° Point, Fixed, Open R06E17, R06E18 annual scale; Engineered structure or dredged channel (BP intake pipe) Beachface Point Other Alongshore Boundary Associated Name Lat. Long. Boundaries Character Beachface Point Secondary Cells
Geomorphic feature (end of Southern Flats); Palm Beach -32.277 115.721 1°, 3° Point, Fixed, Open R06D16, R06E17 Rockingham Adjacent cells have a different shoreline aspect restricting sediment transport at an annual scale
Garden Island -32.268 115.700 3° Point, Fixed, Closed Engineered structure or dredged channel (Garden Island causeway) R06D15, R06D16 causeway
Rock structures restricting sediment transport at an annual scale ; Cape Peron -32.265 115.686 3° Point, Fixed, Open Adjacent cells have a different shoreline aspect restricting sediment transport at an R06D14, R06D15 annual scale
Geomorphic feature (tombolo); Mersey Point -32.305 115.701 3° Zone, Ambulatory, Open Adjacent cells have a different shoreline aspect restricting sediment transport at an R06D13, R06D14 annual scale
Geomorphic feature (focal location of onshore sediment feed by North Sands in lee of promontory); Safety Bay -32.306 115.713 3° Zone, Ambulatory, Open R06C12, R06D13 Adjacent cells have a different shoreline aspect restricting sediment transport at an annual scale
Geomorphic feature (focal location of onshore sediment feed by South Sands in lee of promontory); North Becher Point -32.369 115.719 3° Zone, Ambulatory, Open R06C11, R06C12 Adjacent cells have a different shoreline aspect restricting sediment transport at an annual scale
Geomorphic feature (northern extent of parabolic dunes); Ansteys Car Park -32.404 115.743 3° Zone, Ambulatory, Open Adjacent cells have a different shoreline aspect restricting sediment transport at an R06C10, R06C11 annual scale
Rock structures restricting sediment transport at an annual scale; Robert Point -32.522 115.699 3° Zone, Ambulatory, Open R06C9, R06C10 Geomorphic feature (salient)
Geomorphic feature (salient); Cape Bouvard -32.685 115.607 1°, 3° Zone, Fixed, Open Adjacent cells have a different shoreline aspect restricting sediment transport at an R06B8, R06C9 annual scale
Preston Beach North -32.840 115.634 3° Zone, Ambulatory, Open Geomorphic feature (salient and northern extent of broad mobile dunes) R06B7, R06B8
Lake Preston South -32.940 115.659 3° Zone, Ambulatory, Open Geomorphic feature (salient and northern extent of broad mobile dunes) R06B6, R06B7
Rock structures restricting sediment transport at an annual scale (rock platform); Binningup -33.146 115.686 3° Zone, Ambulatory, Open R06B5, R06B6 Geomorphic feature (salient)
Rock structures restricting sediment transport at an annual scale; Adjacent cells have a different shoreline aspect restricting sediment transport at an Bunbury Harbour -33.300 115.646 1°, 3° Point, Fixed, Open R06A4, R06B5 annual scale; Engineered structure or dredged channel
Capel River Mouth -33.512 115.518 3° Zone, Ambulatory, Open Geomorphic feature (Capel River mouth) R06A3, R06A4
Norman Road -33.655 115.277 3° Zone, Ambulatory, Open Geomorphic feature (transverse bar connected to shore at a salient) R06A2, R06A3 65 66
Beachface Point Other Alongshore Boundary Associated Name Lat. Long. Boundaries Character Beachface Point Secondary Cells
Point Piquet -33.565 115.084 3° Point, Fixed, Open Rock structures restricting sediment transport at an annual scale R06A1, R06A2
Rock structures restricting sediment transport at an annual scale; Last cell in Region Cape Naturaliste -33.532 115.003 1°, 3° Point, Fixed, Open Adjacent cells have a different shoreline aspect restricting sediment transport at an R05, R06A1 annual scale
Rottnest Island
Rock structures restricting sediment transport at an annual scale; North Point -31.987 115.512 3° Point, Fixed, Open Adjacent cells have a different shoreline aspect restricting sediment transport at an R06DRI4, R06DRI3 annual scale
Rock structures restricting sediment transport at an annual scale; Cape Vlamingh -32.025 115.449 3° Point, Fixed, Closed Adjacent cells have a different shoreline aspect restricting sediment transport at an R06DRI3, R06DRI2 annual scale
Rock structures restricting sediment transport at an annual scale; Parker Point -32.027 115.529 3° Point, Fixed, Open Adjacent cells have a different shoreline aspect restricting sediment transport at an R06DRI2, R06DRI1 annual scale
Rock structures restricting sediment transport at an annual scale; Geomorphic feature (spit); Philip Point -32.003 115.559 3° Point, Fixed, Open R06DRI1, R06DRI4 Adjacent cells have a different shoreline aspect restricting sediment transport at an annual scale
Garden Island
Geomorphic feature (salient); Dance Head -32.173 115.677 - Zone, Ambulatory, Open Adjacent cells have a different shoreline aspect restricting sediment transport at an R06DGI4, R06EGI1 annual scale
Rock structures restricting sediment transport at an annual scale; Baudin Point -32.245 115.682 3° Point, Fixed, Open Adjacent cells have a different shoreline aspect restricting sediment transport at an R06D14, R06DGI4 annual scale Collie Head -32.246 115.692 3° Point, Fixed, Open Rock structures restricting sediment transport at an annual scale R06DGI3, R06D14 Geomorphic feature (old spit); Parkin Point -32.241 115.693 1° Point, Fixed, Open Adjacent cells have a different shoreline aspect restricting sediment transport at an R06EGI2, R06DGI3 annual scale Geomorphic feature (salient); Adjacent cells have a different shoreline aspect restricting sediment transport at an Colpoys Point -32.226 115.700 3° Zone, Ambulatory, Open R06EGI1, R06EGI2 annual scale; Engineered structure or dredged channel (groyne) Table D.4: Rationale for selection of secondary cell onshore, offshore and alongshore boundaries in the Vlamingh Region An extension of marine section and beachface to the point directly boundary if there onshore is no change in foredune plains, parabolic dunes dunes between or frontal adjacent cells (orthogonal to coast) An extension of marine section and beachface to the point directly boundary if there onshore is no change in foredune plains, parabolic dunes dunes between or frontal adjacent cells (orthogonal to coast) An extension of marine section and beachface to the point directly boundary if there onshore is no change in foredune plains, parabolic dunes dunes between or frontal adjacent cells An extension of marine section and beachface to the point directly boundary if there onshore is no change in foredune plains, parabolic dunes dunes between or frontal adjacent cells To” Alongshore Boundary Alongshore “ To” Fixed by submerged rock or islands outcrops (high point of Gretel Reef) of sediment Area transport convergence on banks or reefs (high point of Hugill Reef); Deepest point or of depression contour reentrant in two (depression ridges) offshore Area of sediment Area transport convergence on (high banks or reefs point of Mallee Reef) Deepest point or of depression contour reentrant River (Moore palaeochannel) Reef River Point Wreck Wreck salient Moore Moore Mallee Yanchep An extension of marine section and beachface to the onshore point directly is no boundary if there plains, change in foredune parabolic dunes or frontal dunes between adjacent cells An extension of marine section and beachface to the onshore point directly is no boundary if there plains, change in foredune parabolic dunes or frontal dunes between adjacent cells (orthogonal to coast) An extension of marine section and beachface to the onshore point directly is no boundary if there plains, change in foredune parabolic dunes or frontal dunes between adjacent cells (orthogonal to coast) An extension of marine section and beachface to the onshore point directly is no boundary if there plains, change in foredune parabolic dunes or frontal dunes between adjacent cells “From” Alongshore Boundary Alongshore “From” Fixed by submerged rock or islands outcrops (unnamed reef); A marine extension of the beachface point to the boundary offshore Area of sediment Area transport convergence on banks or reefs (high point of Hugill Reef); Deepest point or of depression contour reentrant in two (depression ridges) offshore Deepest point or of depression contour reentrant in two (depression ridges) offshore Area of sediment Area transport convergence on (high banks or reefs point of Mallee Reef) Point Marine Section Section Terrestrial Point Marine Section Section Terrestrial Reef Point Burns salient Wreck Wreck salient Beach Mallee Yanchep Landward extent of frontal extent of frontal Landward or dunes (in non-engineered areas); non-cliffed Landgate MHWM to 2006 on coasts with shore engineered without parallel structures (Mindarie dunes to landward Keys); Landgate MHWM to 2006 for low to moderately high cliffed coasts without dunes (Mindarie Keys to Mindarie N) Landward extent of frontal extent of frontal Landward dunes; headland) Landgate (Yanchep Landward extent of frontal extent of frontal Landward dunes; Landgate MHWM to 2006 on coasts with shore engineered without parallel structures Rocks (Two dunes to landward marina) Landward extent of frontal extent of frontal Landward dunes Offshore BoundaryOffshore Boundary Onshore Toe of reef ridge closest to of reef Toe <-15m AHD depth if shore multiple ridges Toe of reef ridge closest to of reef Toe <-15m AHD depth if shore multiple ridges Toe of reef ridge closest to of reef Toe <-15m AHD depth if shore multiple ridges Toe of reef ridge closest to of reef Toe <-15m AHD depth if shore multiple ridges Cell Salient R06I32. Yanchep salient to R06H30. R06H31. R06G29. Salient to Yanchep to Yanchep Mallee Reef Moore River Moore Wreck Point Wreck Wreck Point Wreck Secondary Burns Beach to Mallee Reef
67 68
“From” Alongshore Boundary To” Alongshore Boundary Secondary “ Cell Offshore Boundary Onshore Boundary Point Marine Section Terrestrial Section Point Marine Section Terrestrial Section
Landward extent of narrow parabolic dunes (to south of Ocean Reef marina); Landgate MHWM to 2006 for low to moderately high cliffed Fixed by coasts without dunes (S of An extension of marine An extension of marine submerged rock Ocean Reef marina, S of Burns Area of sediment section and beachface section and beachface R06G28. transport point directly to the onshore outcrops or islands point directly to the Toe of reef ridge closest to Beach); Burns Pinnaroo Pinnaroo convergence on boundary if there is no (unnamed reef); onshore boundary if there shore <-15m AHD depth if Landgate MHWM to 2006 on Beach Point to Burns Point banks or reefs change in foredune plains, A marine extension is no change in foredune multiple ridges engineered coasts with shore salient Beach Salient (ridge of Lal Bank parabolic dunes or frontal of the beachface plains, parabolic dunes parallel structures without and offshore reefs) dunes between adjacent point to the or frontal dunes between dunes to landward (Ocean cells offshore boundary adjacent cells Reef marina); Landward extent of foreshore reserve in built areas (north of Ocean Reef marina except for where cliff is present)
Landward extent of foreshore reserve in built areas & Landgate MHWM to 2006 for An extension of marine An extension of marine low to moderately high cliffed A marine extension section and beachface Area of sediment section and beachface coasts without dunes (Trigg to of the beachface point directly to the onshore transport point directly to the R06F27. Trigg Toe of reef ridge closest to Sorrento); point to the boundary if there is no Pinnaroo convergence on onshore boundary if there to Pinnaroo shore <-15m AHD depth if Landward extent of frontal Trigg offshore boundary change in foredune plains, Point banks or reefs is no change in foredune Point multiple ridges dunes (Sorrento to Hillary; (incorporates parabolic dunes or frontal (ridge of Lal Bank plains, parabolic dunes Hillarys to Pinnaroo Points); depression offshore dunes between adjacent and offshore reefs) or frontal dunes between of Trigg Island) Landgate MHWM to 2006 on cells adjacent cells engineered coasts with shore parallel structures without dunes to landward (Hillarys)
Centreline of Continuous -15m AHD An extension of marine an engineered A marine extension isobath closest to shore section and beachface Landward extent of foreshore structure or toe of of the beachface (Mudurup Rocks to Empire point directly to the R06F26. reserve in built areas (Mudurup a dredged channel Centreline of engineered point to the Avenue); Mudurup onshore boundary if there Mudurup Rocks to Swanbourne); (Cottesloe groyne); structure or feature Trigg offshore boundary Toe of reef ridge closest to Rocks is no change in foredune Rocks to Trigg Landward extent of frontal A marine extension (Cottesloe groyne) (incorporates shore <-15m AHD depth plains, parabolic dunes dunes (Swanbourne to Trigg) of the beachface depression offshore if multiple ridges (Empire or frontal dunes between point to the of Trigg Island) Avenue to Trigg) adjacent cells offshore boundary “From” Alongshore Boundary To” Alongshore Boundary Secondary “ Cell Offshore Boundary Onshore Boundary Point Marine Section Terrestrial Section Point Marine Section Terrestrial Section
Landgate MHWM to 2006 on engineered coasts with shore parallel structures without Centreline of Centreline of an engineered dunes to landward (to Port an engineered R06F25. structure or toe of Beach); structure or toe of South Mole a dredged channel Centreline of engineered Continuous -15m AHD Landward extent of frontal South Mole a dredged channel Mudurup Fremantle No terrestrial section (Cottesloe groyne); structure or feature isobath closest to shore dunes (Port Beach to Mudurup Fremantle (dredged channel Rocks to Mudurup (Cottesloe groyne) Rocks); and centreline A marine extension Rocks of the beachface Landgate MHWM to 2006 of South Mole Fremantle) point to the for low to moderately high offshore boundary cliffed coasts without dunes (Mudurup Rocks)
Continuous -15m AHD isobath closest to shore R06D24. (historically would have Not Not Stragglers been, but dredged applicable applicable Area of sediment Toe of Holocene Rocks to shipping channel has as does Not applicable as the cell does as does not transport sediment banks West Shipping disconnected the banks No terrestrial section not No terrestrial section not extend onshore connect convergence on (Success Bank into Channel, and this cell from the connect to the banks or reefs Gage Roads) northwest coast); to the beachface Success Bank Toe of sediment bank beachface (dredged shipping channel through Success Bank)
Continuous -15m AHD isobath closest to shore (historically would have R06D23. Not been, but dredged Not Area of sediment Carnac Island applicable shipping channel has applicable transport Area of sediment to Stragglers as does disconnected the banks Not applicable as the cell does as does not convergence on transport Rocks,west No terrestrial section not No terrestrial section and this cell from the not extend onshore connect banks or reefs convergence on Parmelia connect coast); to the (including through banks or reefs and Success to the beachface Carnac Island) Banks Toe of sediment bank beachface (dredged shipping channel through Success and Parmelia Banks)
Continuous -15m AHD Landward extent of foreshore An extension of marine Centreline of Area of sediment section and beachface an engineered R06D22. isobath closest to shore; reserve in built areas (to Fishing transport point directly to the onshore structure or toe of Catherine Sailing Club); Toe of sediment bank Catherine convergence on boundary if there is no South Mole a dredged channel Point to No terrestrial section (Dredged navigation Landgate MHWM to 2006 on Point banks or reefs change in foredune plains, Fremantle (dredged channel South Mole channel and Cockburn engineered coasts with shore (crest of Success parabolic dunes or frontal and centreline Fremantle Cement dredged area and parallel structures without Bank) dunes between adjacent of South Mole toe of Success Bank) dunes to landward (Harbours) cells (orthogonal to coast) Fremantle) 69 70
“From” Alongshore Boundary To” Alongshore Boundary Secondary “ Cell Offshore Boundary Onshore Boundary Point Marine Section Terrestrial Section Point Marine Section Terrestrial Section
Landward extent of frontal dunes (higher beach ridges); An extension of marine Toe of sediment bank Landgate MHWM to 2006 on section and beachface Area of sediment Area of sediment R06D21. (Middle Ground and engineered coasts with shore point directly to the transport transport Woodman Dredged navigation parallel structures without Centreline of engineered onshore boundary if there Woodman convergence on Catherine convergence on Point to channel and Cockburn dunes to landward (Port structure or feature (WAPET is no change in foredune Point banks or reefs Point banks or reefs Catherine Cement dredged area Coogee); groyne) plains, parabolic dunes (crest of Parmelia (crest of Success Point on Parmelia Bank and or frontal dunes between Landward extent of foreshore Bank) Bank) Success Banks) reserve in built areas (from Port adjacent cells (orthogonal Coogee to Catherine Point to coast) groyne)
Centreline of Area of sediment R06D20. Toe of sediment bank an engineered transport Woodman (Dredged navigation Central line, watershed or ridge Centreline of engineered Centreline of engineered Woodman structure or toe of Woodman convergence on Point groyne channel and Cockburn line on promontories or islands structure or feature structure or feature Point groyne a dredged channel Point banks or reefs to Woodman Cement dredged area on (central line of Woodman Point) (Woodman Point groyne) (WAPET groyne) (Woodman Point (crest of Parmelia Point Parmelia Bank) groyne) Bank)
R06E19. Landward extent of narrow Centreline of Australian an engineered parabolic dunes; Australian Toe of Holocene Woodman Centreline of engineered Maritime Toe of sediment bank structure or toe of Maritime sediment banks No terrestrial section Point structure or feature Complex to (Parmelia Bank) Central line, watershed or ridge a dredged channel Complex (Parmelia Bank) Groyne (Woodman Point groyne) Woodman line on promontories or islands (Woodman Point Point groyne (central line of Woodman Point) groyne)
Landward extent of frontal dunes; Landgate MHWM to 2006 on R06E18. engineered coasts with shore Centreline of James Point parallel structures without an engineered Centreline of engineered Australian Toe of Holocene Toe of sediment bank James to Australian dunes to landward (around structure or toe of structure or feature (BP Maritime sediment banks No terrestrial section (Jervoise Bay Bank) Point Maritime Power Station); a dredged channel intake pipe) Complex (Parmelia Bank) (BP intake pipe) Complex Landgate MHWM to 2006 for low to moderately high cliffed coasts without dunes (Challenger Beach to AMC)
An extension of marine section and beachface R06E17. Area of sediment point directly to the onshore A marine extension Palm Beach transport Centreline of engineered Landward extent of frontal Palm Beach boundary if there is no James of the beachface Rockingham Toe of sediment bank convergence on structure or feature (BP dunes Rockingham change in foredune plains, Point point to the to James banks or reefs intake pipe) parabolic dunes or frontal offshore boundary Point (Southern Flats) dunes between adjacent cells “From” Alongshore Boundary To” Alongshore Boundary Secondary “ Cell Offshore Boundary Onshore Boundary Point Marine Section Terrestrial Section Point Marine Section Terrestrial Section
An extension of marine Centreline of section and beachface R06D16. Area of sediment an engineered point directly to the Garden Island Garden Centreline of engineered transport Toe of sediment bank Landward extent of frontal structure or toe of Palm Beach onshore boundary if there Causeway to Island structure or feature (Garden convergence on (Southern Flats) dunes a dredged channel Rockingham is no change in foredune Palm Beach causeway Island causeway) banks or reefs (Garden Island plains, parabolic dunes Rockingham (Southern Flats) causeway) or frontal dunes between adjacent cells
An extension of marine R06D15. section and beachface Centreline of Cape Peron to Central line, watershed or ridge point directly to the onshore an engineered Fixed by Garden Centreline of engineered mid-Southern Toe of sediment bank line on promontories or islands Cape boundary if there is no structure or toe of submerged rock Island structure or feature Flats and (Southern Flats) (central line of Cape Peron Peron change in foredune plains, a dredged channel outcrops or islands causeway (Garden Island causeway) Garden Island peninsular) parabolic dunes or frontal (Garden Island Causeway dunes between adjacent causeway) cells (orthogonal to coast)
R06D14. Mersey Point Landward extent of narrow An extension of marine to Cape Peron An extension of marine parabolic dunes (to Bird Island, Area of sediment section and beachface and southern section and beachface Cape Section 1); transport point directly to the Garden Island Continuous -15m AHD Mersey Point point directly to the onshore Peron convergence on Fixed by onshore boundary if there (Section isobath closest to shore Central line, watershed or (Section 1), boundary if there is no (Section banks or reefs submerged rock is no change in foredune 1: Mersey (and Garden Island to ridge line on promontories or Collie Head change in foredune plains, 1), Baudin (tombolo to outcrops or islands plains, parabolic dunes Point to north) islands (central line of Cape (Section 2) parabolic dunes or frontal Point Penguin Island and or frontal dunes between Cape Peron, Peron peninsular for Section 1, dunes between adjacent (Section 2) then reef ridge) adjacent cells (orthogonal Section 2: central line of Garden Island for cells (orthogonal to coast) to coast) Collie Head to Section 2) Baudin Point)
An extension of marine Area of sediment An extension of marine Area of sediment section and beachface transport section and beachface transport point directly to the convergence on point directly to the onshore R06D13. convergence on onshore boundary if there Continuous -15m AHD Landward extent of foreshore Safety banks or reefs boundary if there is no Mersey Safety Bay to banks or reefs is no change in foredune isobath closest to shore reserve in built areas Bay (follows crest of bar change in foredune plains, Point Mersey Point (tombolo to plains, parabolic dunes through Tern Island parabolic dunes or frontal Penguin Island and or frontal dunes between to Third Rock, to dunes between adjacent then reef ridge) adjacent cells (orthogonal outer reef ) cells (orthogonal to coast) to coast)
An extension of marine Landward extent of foredune Area of sediment An extension of marine Area of sediment R06C12. section and beachface plain; transport section and beachface transport North Becher point directly to the convergence on point directly to the onshore convergence on Point to Landward extent of narrow North onshore boundary if there Continuous -15m AHD banks or reefs boundary if there is no banks or reefs Safety Bay parabolic dunes; Becher Safety Bay is no change in foredune isobath closest to shore (follows crest of change in foredune plains, (follows crest of bar (excluding Point plains, parabolic dunes Landward extent of foreshore bar to outer reef to parabolic dunes or frontal through Tern Island Warnbro or frontal dunes between reserve in built areas (from capture northern dunes between adjacent to Third Rock, to basin) adjacent cells (orthogonal Waikiki to Safety Bay) transport) cells outer reef ) to coast) 71 72
“From” Alongshore Boundary To” Alongshore Boundary Secondary “ Cell Offshore Boundary Onshore Boundary Point Marine Section Terrestrial Section Point Marine Section Terrestrial Section
Fixed by An extension of marine Area of sediment An extension of marine submerged rock section and beachface transport section and beachface R06C11. outcrops or islands point directly to the onshore convergence on point directly to the Toe of reef ridge closest to North Ansteys Car Landward extent of narrow Ansteys (inshore reef); boundary if there is no banks or reefs onshore boundary if there shore <-15m AHD depth if Becher Park to North parabolic dunes Car Park change in foredune plains, (follows crest of is no change in foredune multiple ridges A marine extension Point Becher Point of the beachface parabolic dunes or frontal bar to outer reef to plains, parabolic dunes point to the dunes between adjacent capture northern or frontal dunes between offshore boundary cells (orthogonal to coast) transport) adjacent cells
An extension of marine Landward extent of narrow An extension of marine Fixed by A marine extension section and beachface parabolic dunes; section and beachface submerged rock of the beachface point directly to the R06C10. point directly to the onshore outcrops or islands Toe of reef ridge closest to Landgate MHWM to 2006 on point to the onshore boundary if there Robert Point Robert boundary if there is no Ansteys (inshore reef); shore <-15m AHD depth if engineered coasts with shore offshore boundary is no change in foredune to Ansteys Point change in foredune plains, Car Park multiple ridges parallel structures without (boundary between A marine extension plains, parabolic dunes Car Park parabolic dunes or frontal dunes to landward (made depression and of the beachface or frontal dunes between dunes between adjacent ground of Mandurah Ocean sandwaves) point to the adjacent cells (orthogonal cells (orthogonal to coast) Marina) offshore boundary to coast)
Landward extent of narrow parabolic dunes (to Dawesville); An extension of marine Continuous -15m AHD Landgate MHWM to 2006 on An extension of marine A marine extension section and beachface isobath closest to shore engineered coasts with shore A marine extension section and beachface of the beachface point directly to the (Cape Bouvard to north parallel structures without of the beachface point directly to the onshore R06C9. Cape point to the onshore boundary if there of Dawesville); Toe of reef dunes to landward (Dawesville); Cape point to the boundary if there is no Robert Bouvard to offshore boundary is no change in foredune ridge closest to shore Bouvard offshore boundary change in foredune plains, Point Robert Point Landward extent of narrow (boundary between plains, parabolic dunes <-15m AHD depth if (line crosses parabolic dunes or frontal parabolic dunes & Landgate depression and or frontal dunes between multiple ridges (north of unnamed reef) dunes between adjacent MHWM to 2006 for low to sandwaves) adjacent cells (orthogonal Dawesville to Robert Point) cells (orthogonal to coast) moderately high cliffed coasts to coast) without dunes (Dawesville to Robert Point)
An extension of marine An extension of marine section and beachface section and beachface A marine extension R06B8. point directly to the A marine extension point directly to the onshore of the beachface Preston Preston onshore boundary if there Continuous -15m AHD Landward extent of narrow of the beachface boundary if there is no Cape point to the Beach North Beach is no change in foredune isobath closest to shore parabolic dunes point to the change in foredune plains, Bouvard offshore boundary to Cape North plains, parabolic dunes offshore boundary parabolic dunes or frontal (line crosses Bouvard or frontal dunes between dunes between adjacent unnamed reef) adjacent cells (orthogonal cells (orthogonal to coast) to coast)
An extension of marine An extension of marine section and beachface section and beachface point directly to the R06B7. Lake A marine extension point directly to the onshore A marine extension Lake Preston onshore boundary if there Preston South Continuous -15m AHD Landward extent of narrow of the beachface boundary if there is no of the beachface Preston Beach is no change in foredune to Preston isobath closest to shore parabolic dunes point to the change in foredune plains, point to the South North plains, parabolic dunes Beach North offshore boundary parabolic dunes or frontal offshore boundary or frontal dunes between dunes between adjacent adjacent cells (orthogonal cells to coast) “From” Alongshore Boundary To” Alongshore Boundary Secondary “ Cell Offshore Boundary Onshore Boundary Point Marine Section Terrestrial Section Point Marine Section Terrestrial Section
An extension of marine An extension of marine section and beachface section and beachface R06B6. A marine extension point directly to the onshore A marine extension point directly to the Lake Binningup to Continuous -15m AHD Landward extent of narrow of the beachface boundary if there is no of the beachface onshore boundary if there Binningup Preston Lake Preston isobath closest to shore parabolic dunes point to the change in foredune plains, point to the is no change in foredune South South offshore boundary parabolic dunes or frontal offshore boundary plains, parabolic dunes dunes between adjacent or frontal dunes between cells (orthogonal to coast) adjacent cells
Landward extent of narrow parabolic dunes (includes the Cut); Central line, watershed or ridge line on promontories or An extension of marine islands (Bunbury Harbour to Pt section and beachface Casuarina); point directly to the R06B5. A marine extension A marine extension onshore boundary if there Bunbury Continuous -15m AHD Landward extent of estuarine Bunbury of the beachface No terrestrial section of the beachface Binningup is no change in foredune Harbour to isobath closest to shore landforms or made ground Harbour point to the (engineered structure) point to the plains, parabolic dunes Binningup for flood-prone land with offshore boundary offshore boundary installed mitigation works (from or frontal dunes between Pt Casuarina to intersection adjacent cells (orthogonal of Koombana and Estuary to coast) Drives. Follows made ground to the NE then NW towards the parabolic dunes south of the Cut)
Landward extent of narrow parabolic dunes (Capel River Mouth to estuarine area in S Bunbury); An extension of marine Landward extent of estuarine section and beachface landforms or made ground Deepest point R06A4. Capel point directly to the onshore A marine extension for flood-prone land with of depression or River mouth Continuous -15m AHD Capel River boundary if there is no Bunbury of the beachface No terrestrial section installed mitigation works (from contour reentrant to Bunbury isobath closest to shore Mouth change in foredune plains, Harbour point to the (engineered structure) intersection of Koombana (Capel River Harbour parabolic dunes or frontal offshore boundary and Estuary Drives to Point palaeochannel) dunes between adjacent Casuarina); cells (river channel) Central line, watershed or ridge line on promontories or islands (Point Casuarina to Bunbury Harbour boundary)
An extension of marine An extension of marine Landward extent of foredune section and beachface section and beachface plain (until Peppermint Grove Area of sediment Deepest point point directly to the R06A3. point directly to the onshore beach); transport of depression or onshore boundary if there Norman Road Continuous -15m AHD Norman boundary if there is no Capel River convergence on contour reentrant is no change in foredune to Capel River isobath closest to shore Landward extent of narrow Road change in foredune plains, Mouth banks or reefs (Capel River plains, parabolic dunes Mouth parabolic dunes (from parabolic dunes or frontal (transverse bar) palaeochannel) or frontal dunes between Peppermint Grove Beach to dunes between adjacent adjacent cells (river Capel River Mouth) cells (orthogonal to coast) channel) 73 74
“From” Alongshore Boundary To” Alongshore Boundary Secondary “ Cell Offshore Boundary Onshore Boundary Point Marine Section Terrestrial Section Point Marine Section Terrestrial Section
An extension of marine section and beachface Area of sediment point directly to the A marine extension R06A2. Point Landgate MHWM to 2006 for transport onshore boundary if there Continuous -15m AHD Point of the beachface Norman Piquet to low to moderately high cliffed No terrestrial section convergence on is no change in foredune isobath closest to shore Piquet point to the Road Norman Road coasts without dunes banks or reefs plains, parabolic dunes offshore boundary (transverse bar) or frontal dunes between adjacent cells (orthogonal to coast)
Landward extent of narrow A marine extension A marine extension R06A1. Cape parabolic dunes; Landgate Continuous -15m AHD Cape of the beachface Point of the beachface Naturaliste to MHWM to 2006 for low to No terrestrial section No terrestrial section isobath closest to shore Naturaliste point to the Piquet point to the Point Piquet moderately high cliffed coasts offshore boundary offshore boundary without dunes
An extension of marine Fixed by An extension of marine section and beachface submerged rock section and beachface point directly to the onshore outcrops or point directly to the R06DRI4. Fixed by Continuous -15m AHD Landward extent of narrow North boundary if there is no Philip islands; A marine onshore boundary if there North Point to submerged rock isobath closest to shore parabolic dunes Point change in foredune plains, Point extension of the is no change in foredune Philip Point outcrops or islands parabolic dunes or frontal beachface point plains, parabolic dunes dunes between adjacent to the offshore or frontal dunes between cells boundary adjacent cells
An extension of marine An extension of marine section and beachface section and beachface Central line, watershed or ridge R06DRI3. point directly to the onshore point directly to the line on promontories or islands Fixed by Fixed by Cape Continuous -15m AHD Cape boundary if there is no onshore boundary if there (watershed line Fairbridge Bluff submerged rock North Point submerged rock Vlamingh to isobath closest to shore Vlamingh change in foredune plains, is no change in foredune to NW of Oliver Hill; Conical Hill outcrops or islands outcrops or islands North Point parabolic dunes or frontal plains, parabolic dunes to Vlamingh Head) dunes between adjacent or frontal dunes between cells adjacent cells
Landward extent of narrow parabolic dunes (Parker Point to Fairbridge Bluff); An extension of marine An extension of marine section and beachface section and beachface Central line, watershed or ridge R06DRI2. point directly to the onshore point directly to the line on promontories or islands Fixed by Fixed by Parker Point Continuous -15m AHD Parker boundary if there is no Cape onshore boundary if there (watershed line Fairbridge Bluff submerged rock submerged rock to Cape isobath closest to shore Point change in foredune plains, Vlamingh is no change in foredune to NW of Oliver Hill; Conical Hill outcrops or islands outcrops or islands Vlamingh parabolic dunes or frontal plains, parabolic dunes to Vlamingh Head); dunes between adjacent or frontal dunes between Landward extent of narrow cells adjacent cells parabolic dunes (Dunes from NW of Oliver Hill to Conical Hill)
An extension of marine An extension of marine Fixed by section and beachface section and beachface submerged rock point directly to the onshore point directly to the R06DRI1. outcrops or islands; Fixed by Continuous -15m AHD Landward extent of narrow Philip boundary if there is no Parker onshore boundary if there Philip Point to A marine extension submerged rock isobath closest to shore parabolic dunes Point change in foredune plains, Point is no change in foredune Parker Point of the beachface outcrops or islands parabolic dunes or frontal plains, parabolic dunes point to the dunes between adjacent or frontal dunes between offshore boundary cells adjacent cells “From” Alongshore Boundary To” Alongshore Boundary Secondary “ Cell Offshore Boundary Onshore Boundary Point Marine Section Terrestrial Section Point Marine Section Terrestrial Section
An extension of marine An extension of marine section and beachface section and beachface R06DGI3. point directly to the Toe of sediment bank A marine extension point directly to the onshore Parkin Point Central line, watershed or ridge Fixed by onshore boundary if there (Southern Flats to East Parkin of the beachface boundary if there is no to Collie Head line on promontories or islands Collie Head submerged rock is no change in foredune and toe of bank to west of Point point to the change in foredune plains, and to mid- (central line of Garden Island) outcrops or islands plains, parabolic dunes Garden Island causeway) offshore boundary parabolic dunes or frontal Southern Flats or frontal dunes between dunes between adjacent adjacent cells (orthogonal cells (orthogonal to coast) to coast)
An extension of marine An extension of marine Toe of reef ridge closest to section and beachface section and beachface A marine extension R06DGI4. shore <-15m AHD depth point directly to the point directly to the onshore of the beachface Baudin Point if multiple ridges (Baudin Central line, watershed or ridge Fixed by onshore boundary if there boundary if there is no Dance point to the to Dance Point to Carnac Island); line on promontories or islands Baudin Point submerged rock is no change in foredune change in foredune plains, Head offshore boundary Head to (central line of Garden Island) outcrops or islands plains, parabolic dunes Toe of sediment bank parabolic dunes or frontal (Dance Head to Carnac Island or frontal dunes between (dredged shipping channel dunes between adjacent offshore boundary) adjacent cells (orthogonal and Parmelia Bank) cells (orthogonal to coast) to coast)
An extension of marine An extension of marine section and beachface A marine extension section and beachface point directly to the R06EGI1. of the beachface point directly to the onshore A marine extension Central line, watershed or ridge onshore boundary if there Dance Head Dance point to the boundary if there is no Colpoys of the beachface Toe of sediment bank line on promontories or islands is no change in foredune to Colpoys Head offshore boundary change in foredune plains, Point point to the (central line of Garden Island) plains, parabolic dunes Point (Dance Head to parabolic dunes or frontal offshore boundary or frontal dunes between offshore boundary) dunes between adjacent adjacent cells (orthogonal cells (orthogonal to coast) to coast)
An extension of marine An extension of marine section and beachface section and beachface point directly to the R06EGI2. A marine extension point directly to the onshore A marine extension Central line, watershed or ridge onshore boundary if there Colpoys Point Colpoys of the beachface boundary if there is no Parkin of the beachface Toe of sediment bank line on promontories or islands is no change in foredune to Parkin Point point to the change in foredune plains, Point point to the (central line of Garden Island) plains, parabolic dunes Point offshore boundary parabolic dunes or frontal offshore boundary or frontal dunes between dunes between adjacent adjacent cells (orthogonal cells (orthogonal to coast) to coast) 75 76 Co-ordinates inLatitudeandLongituderoundedto3decimalplaces Table D.5:RationaleforselectionoftertiarycellbeachfacepointsintheVlaminghRegion Beachface Point Lat. Long. Other Alongshore Boundary Beachface Point Associated Name Boundaries Character Tertiary Cells
Guilderton N -31.343 115.490 - Point, Fixed, Open Engineered structure or dredged channel (groyne) R06I32d, R07A1a
Guilderton S -31.363 115.504 - Zone, Ambulatory, Open Geomorphic feature (salient) R06I32c, R06I32d
Wilbinga Rock structures restricting sediment transport at a seasonal scale; -31.413 115.542 - Point, Fixed, Open R06I32b, R06I32c Rocks Geomorphic feature (blowout)
Rock structures restricting sediment transport at a seasonal scale; Wilbinga -31.435 115.552 - Zone, Fixed, Open R06I32a, R06I32b Geomorphic feature (salient)
Rock structures restricting sediment transport at a seasonal scale; Mallee Reef -31.464 115.564 1°, 2° Zone, Ambulatory, Open Geomorphic feature (salient, at a primary scale it is the breakpoint in the Holocene R06H31a, R06I32a salient dune field. Maintained at the tertiary scale. Note boundary is at mid-point of a blowout between two SE-NW beachface rock platforms)
Rock structures restricting sediment transport at a seasonal scale; Wreck Point -31.503 115.585 2° Point, Ambulatory, Open R06H30b, R06H31a Geomorphic feature (salient)
Yanchep Rock structures restricting sediment transport at a seasonal scale; -31.532 115.609 - Point, Fixed, Open R06H30a, R06H30b headland N Geomorphic feature (small salient)
Geomorphic feature (small salient from onshore feed and discontinuity in dune Yanchep -31.563 115.633 1°, 2° Zone, Ambulatory, Open R06G29d, R06H30a system)
Geomorphic feature (Bay. A gap in bathymetry reflected on land. Separation between Alkimos -31.613 115.662 - Zone, Ambulatory, Open R06G29c, R06G29d parabolics onshore)
Quinns Rock Rock structures restricting sediment transport at a seasonal scale (northern extent of -31.644 115.680 - Point, Fixed, Open R06G29b, R06G29c N bluff adjacent to beach)
Mindarie Rock structures restricting sediment transport at a seasonal scale (northern extent of -31.682 115.697 - Point, Fixed, Open R06G29a, R06G29b Keys N bluff adjacent to beach)
Burns Beach Rock structures restricting sediment transport at a seasonal scale; -31.717 115.708 2° Zone, Ambulatory, Open R06G28b, R06G29a Salient Geomorphic feature (salient)
South of Rock structures restricting sediment transport at a seasonal scale (reach of rock. Ocean Reef -31.767 115.730 - Zone, Fixed, Open R06G28a, R06G28b Links to offshore rock structures) Marina
Geomorphic feature (cuspate foreland); Pinnaroo -31.804 115.729 1°, 2° Zone, Ambulatory, Open R06F27c, R06G28a Point Adjacent cells have a different shoreline aspect restricting sediment transport at a seasonal scale
Engineered structure or dredged channel (Hillarys Marina. intersection of the MHWM Hillarys -31.820 115.737 - Zone, Fixed, Closed [mobile boundary] with the engineered structure. Cell to South ends at southern R06F27b, R06F27c Marina breakwater and cell to the north starts at the Northern Breakwater) Beachface Point Lat. Long. Other Alongshore Boundary Beachface Point Associated Name Boundaries Character Tertiary Cells
South -31.840 115.750 - Point, Fixed, Open Rock structures restricting sediment transport at a seasonal scale R06F27a, R06F27b Sorrento
Rock structures restricting sediment transport at a seasonal scale; Trigg -31.876 115.751 2° Point, Fixed, Open R06F26d, R06F27a Geomorphic feature (salient)
Brighton Geomorphic feature (Southern end of Scarborough rock salient including marine -31.898 115.755 - Zone, Ambulatory, Open R06F26c, R06F26d Road feature. It is also the northern extent of a sediment transport feed)
Geomorphic feature (Start of offshore ridge of reef structures and located landward Empire of shallow rock feature. Change from wide and shallow rock to narrow fringing rock -31.920 115.755 - Zone, Ambulatory, Open R06F26b, R06F26c Avenue in the submarine area. Relic shore-perpendicular sand features to the north. Also transition to scalloped dunes to north)
north Swanbourne -31.956 115.754 - Point, Fixed, Open Engineered structure or dredged channel (old sewerage pipe) R06F26a, R06F26b pipe
Rock structures restricting sediment transport at a seasonal scale; Mudurup -31.997 115.751 2° Point, Fixed, Closed Geomorphic feature (salient); R06F25b, R06F26a Rocks Engineered structure or dredged channel (Cottesloe groyne)
Leighton -32.031 115.746 - Zone, Ambulatory, Open Geomorphic feature (salient) R06F25a, R06F25b salient
Engineered structure or dredged channel (South Mole Fremantle and dredged South Mole -32.056 115.732 1°, 2° Point, Fixed, Closed channel. The subsequent tertiary cell would only really start at Rous Head as it is a R06D22a, R06F25a Fremantle wide boundary between South Mole Fremantle and Rous Head)
Geomorphic feature (salient); Catherine Adjacent cells have a different shoreline aspect restricting sediment transport at a -32.085 115.751 2° Point, Fixed, Open R06D21a, R06D22a Point seasonal scale; Engineered structure or dredged channel (Catherine Point groyne)
Woodman -32.135 115.737 2° Point, Fixed, Open Engineered structure or dredged channel (WAPET groyne) R06D20a, R06D21a Point
Woodman Geomorphic feature (end of Parmelia Bank/start of Cockburn Sound); -32.137 115.744 1°, 2° Point, Fixed, Closed R06E19a, R06D20a Point groyne Engineered structure or dredged channel (groyne and reclaimed peninsular)
Geomorphic feature (southern end of Parmelia Bank); Australian Adjacent cells have a different shoreline aspect restricting sediment transport at a Maritime -32.140 115.761 2° Point, Fixed, Closed R06E18a, R06E19a seasonal scale; Complex Engineered structure or dredged channel (AMC)
Geomorphic feature (salient); Adjacent cells have a different shoreline aspect restricting sediment transport at a James Point -32.227 115.756 2° Point, Fixed, Open R06E17a, R06E18a seasonal scale; Engineered structure or dredged channel (BP intake pipe) 77 78
Beachface Point Lat. Long. Other Alongshore Boundary Beachface Point Associated Name Boundaries Character Tertiary Cells
Geomorphic feature (end of Southern Flats); Palm Beach -32.277 115.721 1°, 2° Zone, Fixed, Open R06D16a, R06E17a Rockingham Adjacent cells have a different shoreline aspect restricting sediment transport at a seasonal scale
Garden Point, Fixed, Closed Island -32.268 115.700 2° (Note: small gap in Engineered structure or dredged channel (Garden Island causeway) R06D15a, R06D16a causeway causeway)
Rock structures restricting sediment transport at a seasonal scale; Cape Peron -32.265 115.686 2° Point, Fixed, Open Adjacent cells have a different shoreline aspect restricting sediment transport at a R06D14c, R06D15a seasonal scale
Bird Island -32.276 115.695 - Zone, Ambulatory, Open Geomorphic feature (salient) R06D14b, R06D14c
Seal Island -32.293 115.701 - Zone, Ambulatory, Open Geomorphic feature (salient) R06D14a, R06D14b
Geomorphic feature (tombolo); Mersey Point -32.305 115.701 2° Zone, Ambulatory, Open Adjacent cells have a different shoreline aspect restricting sediment transport at a R06D13a, R06D14a seasonal scale
Geomorphic feature (focal location of onshore sediment feed by North Sands in lee of promontory); Safety Bay -32.306 115.713 2° Zone, Ambulatory, Open R06C12a, R06D13a Adjacent cells have a different shoreline aspect restricting sediment transport at a seasonal scale
Geomorphic feature (focal location of onshore sediment feed by South Sands in lee of North promontory); -32.369 115.719 2° Zone, Ambulatory, Open R06C11a, R06C12a Becher Point Adjacent cells have a different shoreline aspect restricting sediment transport at a seasonal scale
Geomorphic feature (northern extent of parabolic dunes); Ansteys Car -32.404 115.743 2° Zone, Ambulatory, Open R06C10b, R06C11a Park Adjacent cells have a different shoreline aspect restricting sediment transport at a seasonal scale
Geomorphic feature (closure of bank with beachface); San Remo -32.486 115.744 - Point, Fixed, Open R06C10a, R06C10b Engineered structure or dredged channel (San Remo groyne)
Rock structures restricting sediment transport at a seasonal scale; Robert Point -32.522 115.699 2° Zone, Ambulatory, Open R06C9b, R06C10a Geomorphic feature (salient)
Point, Fixed, Open Engineered structure or dredged channel (Dawesville Training wall and dredged Dawesville -32.599 115.628 - (engineered bypassing R06C9a, R06C9b channel) occurs) Beachface Point Lat. Long. Other Alongshore Boundary Beachface Point Associated Name Boundaries Character Tertiary Cells
Geomorphic feature (salient); Cape -32.685 115.607 1°, 2° Zone, Fixed, Open R06B8b, R06C9a Bouvard Adjacent cells have a different shoreline aspect restricting sediment transport at a seasonal scale
Lake Clifton -32.770 115.623 - Zone, Ambulatory, Open Geomorphic feature (boundary of inshore marine basin) R06B8a, R06B8b North
Preston -32.840 115.634 2° Zone, Ambulatory, Open Geomorphic feature (salient and northern extent of broad mobile dunes) R06B7a, R06B8a Beach North
Lake Preston -32.940 115.659 2° Zone, Ambulatory, Open Geomorphic feature (salient and northern extent of broad mobile dunes) R06B6b, R06B7a South
Myalup -33.019 115.676 - Zone, Ambulatory, Open Geomorphic feature (northern extent of former marine lagoon) R06B6a, R06B6b North
Rock structures restricting sediment transport at a seasonal scale (rock platform); Binningup -33.146 115.686 2° Zone, Ambulatory, Open R06B5c, R06B6a Geomorphic feature (salient)
Rock structures restricting sediment transport at a seasonal scale; Buffalo Road -33.201 115.683 - Zone, Ambulatory, Open R06B5b, R06B5c Geomorphic feature (northern end of Leschenault inlet)
Adjacent cells have a different shoreline aspect restricting sediment transport at Leschenault -33.282 115.680 - Zone, Ambulatory, Open a seasonal scale (point of inflection in dunes and northern extent of shelter from R06B5a, R06B5b South Bunbury Harbour breakwater)
Rock structures restricting sediment transport at a seasonal scale; Bunbury Adjacent cells have a different shoreline aspect restricting sediment transport at a -33.300 115.646 1°, 2° Point, Fixed, Closed R06A4b, R06B5a Harbour seasonal scale; Engineered structure or dredged channel
Stirling Rock structures restricting sediment transport at a seasonal scale; -33.465 115.562 - Zone, Fixed, Open R06A4a, R06A4b Beach Geomorphic feature (southern end of lagoon system)
Capel River -33.512 115.518 2° Zone, Ambulatory, Open Geomorphic feature (Capel River mouth) R06A3d, R06A4a Mouth
Forrest -33.579 115.455 - Zone, Ambulatory, Open Geomorphic feature (salient and northern extent of Vasse-Wonnerup Inlet) R06A3c, R06A3d Beach
Geomorphic feature (transverse bar connected to shore); Wonnerup -33.627 115.398 - Point, Fixed, Open R06A3b, R06A3c Engineered structure or dredged channel (Port Geographe eastern groyne)
Busselton -33.642 115.350 - Zone, Ambulatory, Open Geomorphic feature (transverse bar connected to shore at a salient) R06A3a, R06A3b
Norman -33.655 115.277 2° Zone, Ambulatory, Open Geomorphic feature (transverse bar connected to shore at a salient) R06A2d, R06A3a Road
Marybrook -33.649 115.200 - Zone, Ambulatory, Open Geomorphic feature (salient) R06A2c, R06A2d
Point -33.630 115.145 - Zone, Ambulatory, Open Geomorphic feature (salient) R06A2b, R06A2c Templar 79 80
Beachface Point Lat. Long. Other Alongshore Boundary Beachface Point Associated Name Boundaries Character Tertiary Cells
Point Daking -33.604 115.107 - Point, Fixed, Open Rock structures restricting sediment transport at a seasonal scale R06A2a, R06A2b
Point Piquet -33.565 115.084 2° Point, Fixed, Open Rock structures restricting sediment transport at a seasonal scale R06A1a, R06A2a
Rock structures restricting sediment transport at a seasonal scale; Cape Last cell in Region -33.532 115.003 1°, 2° Point, Fixed, Open Naturaliste Adjacent cells have a different shoreline aspect restricting sediment transport at a R05, R06A1a seasonal scale
Rottnest Island
Rock structures restricting sediment transport at a seasonal scale; R06DRI4b, Philip Point -32.003 115.559 2° Point, Fixed, Open Geomorphic feature (spit); Adjacent cells have a different shoreline aspect restricting sediment transport at a R06DRI1a seasonal scale
Rock structures restricting sediment transport at a seasonal scale; Bathurst R06DRI4a, -31.990 115.542 - Zone, Fixed, Open Point Adjacent cells have a different shoreline aspect restricting sediment transport at a R06DRI4b seasonal scale
Rock structures restricting sediment transport at a seasonal scale; R06DRI3c, North Point -31.987 115.512 2° Point, Fixed, Open Adjacent cells have a different shoreline aspect restricting sediment transport at a R06DRI4a seasonal scale
R06DRI3b, Rocky Bay -32.009 115.480 - Zone, Ambulatory, Open Geomorphic feature (salient) R06DRI3c
Rock structures restricting sediment transport at a seasonal scale; Abraham R06DRI3a, -32.013 115.468 - Point, Fixed, Open Point Adjacent cells have a different shoreline aspect restricting sediment transport at a R06DRI3b seasonal scale
Rock structures restricting sediment transport at a seasonal scale; Cape R06DRI2c, -32.025 115.449 2° Point, Fixed, Closed Vlamingh Adjacent cells have a different shoreline aspect restricting sediment transport at a R06DRI3a seasonal scale
Rock structures restricting sediment transport at a seasonal scale; R06DRI2b, South Point -32.021 115.470 - Point, Fixed, Open Adjacent cells have a different shoreline aspect restricting sediment transport at a R06DRI2c seasonal scale
Rock structures restricting sediment transport at a seasonal scale; R06DRI2a, Kitson Point -32.019 115.493 - Point, Fixed, Open Adjacent cells have a different shoreline aspect restricting sediment transport at a R06DRI2b seasonal scale
Rock structures restricting sediment transport at a seasonal scale; R06DRI1b, Parker Point -32.027 115.529 2° Point, Fixed, Open Adjacent cells have a different shoreline aspect restricting sediment transport at a R06DRI2a seasonal scale Beachface Point Lat. Long. Other Alongshore Boundary Beachface Point Associated Name Boundaries Character Tertiary Cells
Rock structures restricting sediment transport at a seasonal scale; R06DRI1a, Bickley Point -32.011 115.554 - Point, Fixed, Open Adjacent cells have a different shoreline aspect restricting sediment transport at a R06DRI1b seasonal scale
Garden Island
Second Rock structures restricting sediment transport at a seasonal scale; -32.165 115.675 1° Point, Fixed, Open R06DGI4f, R06DGI4e Head Geomorphic feature (Parmelia Bank edge)
Armaments Geomorphic feature (salient); -32.175 115.677 - Point, Fixed, Open R06EGI1a, R06DGI4f Jetty Engineered structure or dredged channel (Armaments Jetty)
R06EGI1b, Cliff Point -32.187 115.677 - Point, Fixed, Open Rock structures restricting sediment transport at a seasonal scale R06EGI1a
Geomorphic feature (salient); Colpoys Adjacent cells have a different shoreline aspect restricting sediment transport at a R06EGI2a, -32.226 115.700 2° Point, Fixed, Open Point seasonal scale; R06EGI1b Engineered structure or dredged channel (groyne)
Geomorphic feature (spit linked to Garden Island causeway); Parkin Point R06DGI3a, -32.242 115.702 - Point, Ambulatory, Open spit Adjacent cells have a different shoreline aspect restricting sediment transport at a R06EGI2a seasonal scale
Collie Head -32.246 115.692 2° Point, Fixed, Open Rock structures restricting sediment transport at a seasonal scale R06D14d, R06DGI3a
Rock structures restricting sediment transport at a seasonal scale; Baudin Point -32.245 115.682 2° Point, Fixed, Open Adjacent cells have a different shoreline aspect restricting sediment transport at a R06DGI4a, R06D14d seasonal scale
R06DGI4b, Buache Bay -32.212 115.671 - Zone, Ambulatory, Open Geomorphic feature (salient) R06DGI4a
R06DGI4c, Point Atwick -32.174 115.660 - Point, Fixed, Closed Rock structures restricting sediment transport at a seasonal scale R06DGI4b
Rock structures restricting sediment transport at a seasonal scale; Entrance R06DGI4d, -32.156 115.661 - Point, Fixed, Open Point Adjacent cells have a different shoreline aspect restricting sediment transport at a R06DGI4c seasonal scale
Rock structures restricting sediment transport at a seasonal scale; Beacon R06DGI4e, -32.156 115.669 - Point, Fixed, Open Head Adjacent cells have a different shoreline aspect restricting sediment transport at a R06DGI4d seasonal scale 81 82 boundaries intheVlaminghRegion Table D.6:Rationaleforselectionoftertiarycellonshore, offshore andalongshore “From” Alongshore Boundary “To” Alongshore Boundary Tertiary Cell Offshore Boundary Onshore Boundary Marine Marine Point Section Terrestrial Section Point Section Terrestrial Section
Landward extent of An extension of marine Centreline foredunes (Moore River bar Focal point section and beachface of an included in mapping); of sediment R06I32d. point directly to the engineered Centreline of Landward extent of the transport Guilderton S -5m AHD isobath onshore boundary if structure engineered structure frontal dune if the foredune Guilderton S convergence on Guilderton N to Guilderton closest to shore there is no change in or toe of a or feature (extension of is eroded or absent; banks or reefs N foredunes or frontal dredged area centreline of structure) (high point of Landgate MHWM to 2006 dunes between (orthogonal unnamed reefs) for bluffed to cliffed coasts adjacent cells to groyne) without dunes
Focal point An extension of marine An extension of marine of sediment A marine section and beachface section and beachface Landward extent of transport R06I32c. extension of the point directly to the point directly to the foredunes; convergence Wilbinga -5m AHD isobath Wilbinga beachface point onshore boundary if onshore boundary if Guilderton S on banks or Rocks to closest to shore Landward extent of the Rocks to the offshore there is no change in there is no change in reefs (high Guilderton S frontal dune if the foredune boundary foredunes or frontal foredunes or frontal point of is eroded or absent (orthogonal) dunes between dunes between unnamed adjacent cells adjacent cells reefs)
Landward extent of An extension of marine A marine An extension of marine foredunes; A marine section and beachface extension section and beachface R06I32b. extension of the point directly to the of the point directly to the Wilbinga to -5m AHD isobath Landward extent of the beachface point onshore boundary if Wilbinga beachface onshore boundary if Wilbinga Wilbinga closest to shore frontal dune if the foredune to the offshore there is no change in Rocks point to the there is no change in Rocks is eroded or absent (note: boundary foredunes or frontal offshore foredunes or frontal some rock outcrops along (orthogonal) dunes between boundary dunes between the shore) adjacent cells (orthogonal) adjacent cells
Focal point of sediment An extension of marine A marine An extension of marine transport section and beachface extension section and beachface Landward extent of convergence on point directly to the R06I32a. of the point directly to the foredunes; banks or reefs onshore boundary if Mallee Reef -5m AHD isobath Mallee Reef beachface onshore boundary if (following higher there is no change in Wilbinga Salient to closest to shore Landward extent of the salient point to the there is no change in order pattern foredunes or frontal Wilbinga frontal dune if the foredune offshore foredunes or frontal of transport dunes between is eroded or absent boundary dunes between convergence adjacent cells (following (orthogonal) adjacent cells in lee of Mallee higher order boundary) Reef) “From” Alongshore Boundary “To” Alongshore Boundary Tertiary Cell Offshore Boundary Onshore Boundary Marine Marine Point Section Terrestrial Section Point Section Terrestrial Section
Landward extent of the frontal dune if the foredune Focal point is eroded or absent; of sediment transport An extension of marine Landgate MHWM to An extension of marine convergence section and beachface 2006 for bluffed to cliffed section and beachface Fixed by rock on banks point directly to the R06H31a. Subtidal seaward coasts without dunes (rock point directly to the outcrops or or reefs onshore boundary if Wreck Point margin of rock outcrops); onshore boundary if Mallee Reef Wreck Point islands (high (following there is no change in to Mallee platform (reefs from there is no change in salient Landgate MHWM to 2006 point of Gretel higher order foredunes or frontal Reef salient LiDAR) foredunes or frontal on engineered coasts with Reef) pattern of dunes between dunes between shore parallel structures transport adjacent cells (following adjacent cells without dunes to landward convergence higher order boundary) (Two Rocks marina in lee of breakwaters and inside Mallee Reef) marina)
Landward extent of An extension of marine An extension of marine foredunes; section and beachface section and beachface R06H30b. -5m AHD isobath Fixed by rock Landward extent of the point directly to the point directly to the Yanchep closest to shore; Fixed by rock outcrops frontal dune if the foredune Yanchep onshore boundary if onshore boundary if Headland outcrops or Wreck Point or islands Subtidal seaward is eroded or absent; headland N there is no change in there is no change in N to Wreck islands (high point of margin of rock foredunes or frontal foredunes or frontal Point platform Landgate MHWM to 2006 Gretel Reef) for bluffed to cliffed coasts dunes between dunes between without dunes adjacent cells adjacent cells
An extension of marine An extension of marine Landward extent of the Fixed by rock section and beachface section and beachface R06H30a. frontal dune if the foredune outcrops point directly to the point directly to the Fixed by rock Yanchep to -5m AHD isobath is eroded or absent; or islands onshore boundary if Yanchep onshore boundary if Yanchep outcrops or Yanchep closest to shore (landward of there is no change in headland N there is no change in Landgate MHWM to 2006 islands Headland N for bluffed to cliffed coasts high point of foredunes or frontal foredunes or frontal without dunes Hugill Reef) dunes between dunes between adjacent cells adjacent cells
An extension of marine An extension of marine Fixed by rock section and beachface Fixed by rock section and beachface outcrops or point directly to the outcrops point directly to the R06G29d. Landward extent of the -5m AHD isobath islands (follows onshore boundary if or islands onshore boundary if Alkimos to frontal dune if the foredune Alkimos Yanchep closest to shore northern end there is no change in (landward of there is no change in Yanchep is eroded or absent of subtidal foredunes or frontal high point of foredunes or frontal pavement) dunes between Hugill Reef) dunes between adjacent cells adjacent cells
An extension of marine An extension of marine Fixed by rock A marine section and beachface section and beachface outcrops extension of the point directly to the point directly to the R06G29c. Landward extent of the or islands -5m AHD isobath Quinns beachface point onshore boundary if onshore boundary if Quinns Rock frontal dune if the foredune Alkimos (follows closest to shore Rock N to the offshore there is no change in there is no change in N to Alkimos is eroded or absent northern end boundary foredunes or frontal foredunes or frontal of subtidal (orthogonal) dunes between dunes between pavement) adjacent cells adjacent cells 83 84
“From” Alongshore Boundary “To” Alongshore Boundary Tertiary Cell Offshore Boundary Onshore Boundary Marine Marine Point Section Terrestrial Section Point Section Terrestrial Section
Landward extent of the Fixed by rock frontal dune if the foredune outcrops or A marine An extension of marine islands (adjacent extension section and beachface R06G29b. is eroded or absent (note to beachface); of the point directly to the Mindarie two groynes and attached -5m AHD isobath Mindarie A marine beachface onshore boundary if Keys N breakwater on salient); No terrestrial section Quinns Rock N closest to shore Keys N extension of the point to the there is no change in to Quinns Landgate MHWM to 2006 beachface point offshore foredunes or frontal Rock N for bluffed to cliffed coasts to the offshore boundary dunes between without dunes (bluff in north boundary (orthogonal) adjacent cells sections) (orthogonal)
Landward extent of the Fixed by rock frontal dune if the foredune outcrops is eroded or absent; Fixed by rock or islands An extension of marine Landgate MHWM to 2006 outcrops (adjacent to R06G29a. section and beachface on engineered coasts with or islands beachface); Burns point directly to the shore parallel structures Burns (unnamed reef); Beach -5m AHD isobath onshore boundary if Mindarie A marine without dunes to landward Beach No terrestrial section salient to closest to shore A marine there is no change in Keys N extension (Mindarie Keys breakwaters Salient Mindarie extension of the foredunes or frontal of the and inside marina); Keys N beachface point dunes between beachface Landgate MHWM to 2006 to the offshore adjacent cells point to the for bluffed to cliffed coasts boundary offshore without dunes (north of boundary Mindarie Keys) (orthogonal)
Landgate MHWM to 2006 Fixed by rock for bluffed to cliffed coasts outcrops without dunes (majority); or islands An extension of marine R06G28b. A marine (unnamed section and beachface -5m AHD isobath Landgate MHWM to 2006 Ocean Reef extension of the reef); point directly to the closest to shore; on engineered coasts with South of Marina beachface point Burns Beach onshore boundary if shore parallel structures Ocean Reef No terrestrial section A marine to Burns Subtidal seaward to the offshore Salient there is no change in without dunes to landward Marina extension Beach margin of rock boundary foredunes or frontal platform (majority) (Ocean Reef marina); of the Salient (orthogonal) beachface dunes between Landward extent of the point to the adjacent cells frontal dune if the foredune offshore is eroded or absent boundary
Focal point of sediment Landward extent of the An extension of marine A marine transport R06G28a. frontal dune if the foredune section and beachface extension Pinnaroo convergence on point directly to the of the is eroded or absent; South of Point to -5m AHD isobath Pinnaroo banks or reefs onshore boundary if beachface Ocean Reef No terrestrial section South of closest to shore Landgate MHWM to 2006 Point (ridge of Lal there is no change in point to the Marina Ocean Reef for bluffed to cliffed coasts Bank); foredunes or frontal offshore without dunes (northern Marina Sediment dunes between boundary cliffed sections) transport adjacent cells (orthogonal) divergence “From” Alongshore Boundary “To” Alongshore Boundary Tertiary Cell Offshore Boundary Onshore Boundary Marine Marine Point Section Terrestrial Section Point Section Terrestrial Section
Focal point of sediment An extension of marine A marine transport section and beachface R06F27c. extension of the Centreline of convergence point directly to the Hillarys Landward extent of the beachface point -5m AHD isobath Hillarys engineered structure Pinnaroo on banks or onshore boundary if Marina to frontal dune if the foredune to the offshore closest to shore Marina or feature (toe of Point reefs (ridge of there is no change in Pinnaroo is eroded or absent boundary (toe of structure) Lal Bank); foredunes or frontal Point Hillarys northern dunes between breakwater) Sediment transport adjacent cells divergence
Landward extent of A marine An extension of foredunes (three groynes extension marine section and and rock outcrops in of the R06F27b. A marine beachface point southern section); beachface Centreline of South extension of the directly to the onshore -5m AHD isobath South Hillarys point to the engineered structure Sorrento Landgate MHWM to 2006 beachface point boundary if there is no closest to shore Sorrento Marina offshore or feature (toe of to Hillarys on engineered coasts with to the offshore change in foredunes boundary (toe structure) Marina shore parallel structures boundary or frontal dunes of Hillarys without dunes to landward between adjacent cells southern (Marmion Angling Club (orthogonal to coast) revetment) breakwater)
An extension of An extension of marine section and A marine marine section and A marine Landward extent of beachface point extension beachface point R06F27a. extension of the foredunes; directly to the onshore of the directly to the onshore Trigg to -5m AHD isobath beachface point South Trigg boundary if there is no beachface boundary if there is no South closest to shore Landgate MHWM to 2006 to the offshore Sorrento change in foredunes point to the change in foredunes Sorrento for bluffed to cliffed coasts boundary or frontal dunes offshore or frontal dunes without dunes (orthogonal) between adjacent cells boundary between adjacent cells (orthogonal to coast) (orthogonal to coast)
An extension of An extension of A marine marine section and marine section and A marine extension beachface point beachface point R06F26d. extension of the of the Landward extent of the directly to the onshore directly to the onshore Brighton -7m AHD isobath Brighton beachface point beachface frontal dune if the foredune boundary if there is no Trigg boundary if there is no Road to closest to shore Road to the offshore point to the is eroded or absent change in foredunes change in foredunes Trigg boundary offshore or frontal dunes or frontal dunes (orthogonal) boundary between adjacent cells between adjacent cells (orthogonal) (orthogonal to coast) (orthogonal to coast)
An extension of An extension of A marine marine section and marine section and A marine extension R06F26c. beachface point beachface point extension of the of the Empire Landward extent of the directly to the onshore directly to the onshore -7m AHD isobath Empire beachface point Brighton beachface Avenue to frontal dune if the foredune boundary if there is no boundary if there is no closest to shore Avenue to the offshore Road point to the Brighton is eroded or absent change in foredunes change in foredunes boundary offshore Road or frontal dunes or frontal dunes (orthogonal) boundary between adjacent cells between adjacent cells (orthogonal) (orthogonal to coast) (orthogonal to coast) 85 86
“From” Alongshore Boundary “To” Alongshore Boundary Tertiary Cell Offshore Boundary Onshore Boundary Marine Marine Point Section Terrestrial Section Point Section Terrestrial Section
An extension of An extension of A marine marine section and marine section and R06F26b. A marine extension beachface point beachface point North extension of the of the Landward extent of the north directly to the onshore directly to the onshore Swanbourne -7m AHD isobath beachface point Empire beachface frontal dune if the foredune Swanbourne boundary if there is no boundary if there is no Pipe to closest to shore to the offshore Avenue point to the is eroded or absent pipe change in foredunes change in foredunes Empire boundary offshore or frontal dunes or frontal dunes Avenue (orthogonal) boundary between adjacent cells between adjacent cells (orthogonal) (orthogonal to coast) (orthogonal to coast)
Landward extent of foredunes; An extension of Landward extent of the A marine marine section and R06F26a. frontal dune if the foredune A marine extension No terrestrial section beachface point Mudurup is eroded or absent; extension of the of the (would be central line of north directly to the onshore Rocks -7m AHD isobath Mudurup beachface point beachface Landgate MHWM to 2006 engineered structure if Swanbourne boundary if there is no to north closest to shore Rocks to the offshore point to the for bluffed to cliffed coasts shoreline was mapped pipe change in foredunes Swanbourne boundary offshore without dunes; in a different manner) or frontal dunes pipe (orthogonal) boundary between adjacent cells Landgate MHWM to 2006 (orthogonal) on engineered coasts with (orthogonal to coast) shore parallel structures without dunes to landward
Landward extent of foredunes; An extension of A marine Landgate MHWM to 2006 marine section and A marine extension No terrestrial section R06F25b. for bluffed to cliffed coasts beachface point extension of the of the (would be central line Leighton without dunes; directly to the onshore -7m AHD isobath Leighton beachface point Mudurup beachface of engineered structure salient to boundary if there is no closest to shore Landgate MHWM to 2006 salient to the offshore Rocks point to the if shoreline was Mudurup change in foredunes on engineered coasts with boundary offshore mapped in a different Rocks or frontal dunes shore parallel structures (orthogonal) boundary manner) between adjacent cells without dunes to landward (orthogonal) (Beach St groyne and (orthogonal to coast) Cottesloe groyne)
A marine An extension of extension of the An extension of marine A marine marine section and Landward extent of beachface point section and beachface extension R06F25a. beachface point foredunes; to the offshore point directly to the of the South Mole directly to the onshore -7m AHD isobath South Mole boundary onshore boundary if Leighton beachface Fremantle Landgate MHWM to 2006 boundary if there is no closest to shore Fremantle (dredged there is no change in salient point to the to Leighton on engineered coasts with change in foredunes channel and foredunes or frontal offshore salient shore parallel structures or frontal dunes centreline of dunes between boundary without dunes to landward between adjacent cells South Mole adjacent cells (orthogonal) (orthogonal to coast) Fremantle) “From” Alongshore Boundary “To” Alongshore Boundary Tertiary Cell Offshore Boundary Onshore Boundary Marine Marine Point Section Terrestrial Section Point Section Terrestrial Section
A marine extension -5m AHD isobath An extension of Landward extent of of the An extension of marine closest to shore; Focal point marine section and foredunes (to Fishing Sailing beachface section and beachface R06D22a. of sediment beachface point Toe of terrace or Club); point to the point directly to the Catherine transport directly to the onshore sediment bank Catherine South Mole offshore onshore boundary if Point to Landgate MHWM to 2006 convergence boundary if there is no (Dredged navigation Point Fremantle boundary there is no change in South Mole on engineered coasts with on banks or change in foredunes channel and Cockburn (dredged foredunes or frontal Fremantle shore parallel structures reefs (crest of or frontal dunes Cement dredged area channel and dunes between without dunes to landward Success Bank) between adjacent cells and toe of Success centreline of adjacent cells (Harbours) (orthogonal to coast) Bank) South Mole Fremantle)
An extension of marine An extension of Toe of terrace or Landward extent of Focal point Focal point section and beachface marine section and sediment bank (Middle foredunes (higher beach of sediment R06D21a. of sediment point directly to the beachface point Ground and Dredged ridges); transport Woodman transport onshore boundary if directly to the onshore navigation channel Woodman Catherine convergence Point to Landgate MHWM to 2006 convergence there is no change in boundary if there is no and Cockburn Cement Point Point on banks or Catherine on engineered coasts with on banks or foredunes or frontal change in foredunes dredged area on reefs (crest Point shore parallel structures reefs (crest of dunes between or frontal dunes Parmelia Bank and of Success without dunes to landward Parmelia Bank) adjacent cells (WAPET between adjacent cells Success Banks) Bank) (Port Coogee) groyne) (orthogonal to coast)
An extension of An extension of marine marine section and Focal point section and beachface R06D20a. Centreline of beachface point of sediment point directly to the Woodman an engineered directly to the onshore transport Toe of terrace or onshore boundary if Point Landward extent of Woodman structure or toe boundary if there is no Woodman convergence sediment bank (and there is no change in groyne to foredunes Point groyne of a dredged change in foredunes Point on banks or toe of dredged area) foredunes or frontal Woodman area (Woodman or frontal dunes reefs (crest dunes between Point Point groyne) between adjacent of Parmelia adjacent cells (WAPET cells (Woodman Point Bank) groyne) groyne)
An extension of Centreline marine section and R06E19a. of an beachface point Australian Centreline of engineered directly to the onshore Australian Toe of Holocene Maritime Toe of terrace or Landward extent of engineered structure Woodman structure boundary if there is no Maritime sediment bank Complex to sediment bank foredunes or feature (AMC Point groyne or toe of a change in foredunes Complex (Parmelia Bank) Woodman breakwater) dredged area or frontal dunes Point groyne (Woodman between adjacent Point groyne) cells (Woodman Point groyne) 87 88
“From” Alongshore Boundary “To” Alongshore Boundary Tertiary Cell Offshore Boundary Onshore Boundary Marine Marine Point Section Terrestrial Section Point Section Terrestrial Section
Landward extent of foredunes; Landgate MHWM to 2006 for bluffed to cliffed coasts Centreline of Toe of R06E18a. without dunes; an engineered Holocene Centreline of James Point Centreline of Australian Toe of terrace or Landgate MHWM to 2006 structure or toe sediment engineered structure to Australian James Point engineered structure or Maritime sediment bank on engineered coasts with of a dredged bank or feature (AMC Maritime feature (BP intake pipe) Complex shore parallel structures area (BP intake (Parmelia breakwater) Complex without dunes to landward pipe) Bank) (large engineered structure at AMC and numerous small breakwaters at southern end of cell)
Landward extent of foredunes; A marine An extension of marine Centreline Landgate MHWM to extension of the section and beachface of an R06E17a. 2006 for bluffed to cliffed beachface point point directly to the engineered Palm Beach Centreline of Toe of terrace or coasts without dunes (rock Palm Beach to the offshore onshore boundary if structure Rockingham James Point engineered structure or sediment bank outcrops); Rockingham boundary there is no change in or toe of a to James feature (BP intake pipe) (extension of foredunes or frontal dredged area Point Landgate MHWM to 2006 (BP intake on engineered coasts with offshore limit to dunes between pipe) shore parallel structures beachface) adjacent cells without dunes to landward
A marine Landward extent of extension An extension of marine R06D16a. Centreline of foredunes; of the section and beachface Garden Toe of terrace or an engineered No terrestrial section beachface point directly to the Island sediment bank (with Landgate MHWM to 2006 Garden structure or toe (would be central line of Palm Beach point to the onshore boundary if Causeway orthogonal extension on engineered coasts with Island of a dredged engineered structure if Rockingham offshore there is no change in to Palm to Garden Island shore parallel structures causeway area (Garden shoreline was mapped boundary foredunes or frontal Beach causeway) without dunes to landward Island causeway in a different manner) (extension of dunes between Rockingham (note numerous groynes and including gaps) structures) offshore limit adjacent cells to beachface)
Centreline Landward extent of of an R06D15a. foredunes; Focal point engineered Cape Peron of sediment No terrestrial section Landgate MHWM to 2006 structure to mid- Toe of terrace or transport (would be central line for bluffed to cliffed coasts Garden or toe of a Southern sediment bank convergence on of engineered structure without dunes; Cape Peron No terrestrial section Island dredged Flats and (mapped to a ridge for banks or reefs; if shoreline was causeway area (Garden Garden mid-southern flats) Landgate MHWM to 2006 mapped in a different Fixed by rock Island Island on engineered coasts with manner) outcrops or causeway Causeway shore parallel structures islands without dunes to landward including gaps) “From” Alongshore Boundary “To” Alongshore Boundary Tertiary Cell Offshore Boundary Onshore Boundary Marine Marine Point Section Terrestrial Section Point Section Terrestrial Section
Focal point Focal point of sediment An extension of marine of sediment transport Landward extent of section and beachface transport -7m AHD isobath convergence R06D14c. foredunes; point directly to the convergence closest to shore; on banks or Bird Island onshore boundary if on banks or Subtidal seaward Landgate MHWM to 2006 Bird Island reefs (lee of Bird Cape Peron No terrestrial section to Cape there is no change in reefs; Peron margin of rock for bluffed to cliffed coasts Island); foredunes or frontal platform without dunes Fixed by rock Sediment dunes between outcrops or transport adjacent cells islands divergence
Focal point Focal point of sediment An extension of marine of sediment An extension of marine transport section and beachface transport section and beachface R06D14b. convergence point directly to the convergence point directly to the Seal Island -7m AHD isobath Landward extent of on banks or onshore boundary if on banks or onshore boundary if Seal Island Bird Island to Bird closest to shore foredunes reefs (lee of Seal there is no change in reefs (lee of there is no change in Island Island); foredunes or frontal Bird Island); foredunes or frontal Sediment dunes between Sediment dunes between transport adjacent cells transport adjacent cells divergence divergence
Focal point of sediment Focal point transport An extension of marine of sediment An extension of marine convergence on section and beachface transport section and beachface R06D14a. banks or reefs point directly to the convergence point directly to the Mersey -7m AHD isobath Landward extent of Mersey (tombolo to onshore boundary if on banks or onshore boundary if Seal Island Point to Seal closest to shore foredunes Point Penguin Island there is no change in reefs (lee of there is no change in Island and then reef foredunes or frontal Seal Island); foredunes or frontal ridge); dunes between Sediment dunes between Sediment adjacent cells transport adjacent cells transport divergence divergence
Focal point Focal point of sediment of sediment transport transport convergence An extension of marine Landward extent of the convergence on No terrestrial section on banks section and beachface R06D13a. frontal dune if the foredune banks or reefs (would be central or reefs point directly to the Safety Bay -7m AHD isobath is eroded or absent (small (follows crest of line of spit and then (tombolo onshore boundary if Safety Bay Mersey Point to Mersey closest to shore structures and note buried bar through Tern orthogonal if shoreline to Penguin there is no change in Point seawall towards Mersey Island to Third was mapped in a Island and foredunes or frontal Point) Rock ); different manner) then reef dunes between Sediment ridge); adjacent cells transport Sediment divergence transport divergence 89 90
“From” Alongshore Boundary “To” Alongshore Boundary Tertiary Cell Offshore Boundary Onshore Boundary Marine Marine Point Section Terrestrial Section Point Section Terrestrial Section
Focal point of sediment Focal point transport R06C12a. An extension of marine of sediment convergence North section and beachface No terrestrial section Landward extent of transport on banks or Becher point directly to the (would be central foredunes; North convergence reefs (follows Point to Toe of terrace or onshore boundary if line of spit and then Becher on banks or Safety Bay crest of bar Safety Bay sediment bank Landward extent of the there is no change in orthogonal if shoreline Point reefs (follows through Tern (excluding frontal dune if the foredune foredunes or frontal was mapped in a crest of bar to Island to Warnbro is eroded or absent dunes between different manner) capture northern Third Rock ); Basin) adjacent cells transport) Sediment transport divergence
Focal point An extension of marine of sediment An extension of marine section and beachface transport section and beachface R06C11a. A marine point directly to the convergence point directly to the Ansteys Landward extent of the extension of the Toe of terrace or Ansteys Car onshore boundary if North on banks or onshore boundary if Car Park frontal dune if the foredune beachface point sediment bank Park there is no change in Becher Point reefs (follows there is no change in to North is eroded or absent to the offshore foredunes or frontal crest of bar foredunes or frontal Becher Point boundary dunes between to capture dunes between adjacent cells northern adjacent cells transport)
Centreline of an engineered An extension of marine An extension of marine A marine structure or toe section and beachface section and beachface Landward extent of extension R06C10b. of a dredged point directly to the point directly to the foredunes; of the San Remo -7m AHD isobath area; onshore boundary if Ansteys Car onshore boundary if San Remo beachface to Ansteys closest to shore Landward extent of the there is no change in Park there is no change in A marine point to the Car Park frontal dune if the foredune foredunes or frontal foredunes or frontal extension of the offshore is eroded or absent dunes between dunes between beachface point boundary to the offshore adjacent cells adjacent cells boundary
Centreline of an engineered Landward extent of An extension of marine structure foredunes; section and beachface An extension of marine point directly to the or toe of a section and beachface A marine R06C10a. Landgate MHWM to 2006 onshore boundary if dredged point directly to the extension of the Robert -7m AHD isobath on engineered coasts with there is no change in area; onshore boundary if shore parallel structures Robert Point beachface point San Remo Point to San closest to shore foredunes or frontal A marine there is no change in without dunes to landward to the offshore Remo dunes between extension foredunes or frontal (numerous groynes and boundary adjacent cells (follows of the dunes between breakwaters. Mandurah reef platform and then beachface adjacent cells channel has been ignored) orthogonal to coast) point to the offshore boundary “From” Alongshore Boundary “To” Alongshore Boundary Tertiary Cell Offshore Boundary Onshore Boundary Marine Marine Point Section Terrestrial Section Point Section Terrestrial Section
Landward extent of An extension of marine foredunes; section and beachface A marine Landgate MHWM to 2006 point directly to the A marine No terrestrial section extension R06C9b. for bluffed to cliffed coasts onshore boundary if extension of the (would be central line of of the Dawesville -5m AHD isobath without dunes; there is no change in Dawesville beachface point engineered structure if Robert Point beachface to Robert closest to shore foredunes or frontal Landgate MHWM to 2006 to the offshore shoreline was mapped point to the Point dunes between on engineered coasts with boundary in a different manner) offshore adjacent cells (follows shore parallel structures boundary without dunes to landward reef platform and then (at Dawesville) orthogonal to coast)
Landward extent of the frontal dune if the foredune is eroded or absent; An extension of marine A marine A marine Landgate MHWM to section and beachface No terrestrial section extension of the extension R06C9a. 2006 for bluffed to cliffed point directly to the (would be central line beachface point of the Cape -5m AHD isobath coasts without dunes (rock Cape onshore boundary if of engineered structure to the offshore Dawesville beachface Bouvard to closest to shore outcrops); Bouvard there is no change in if shoreline was boundary point to the Dawesville foredunes or frontal mapped in a different Landgate MHWM to 2006 (line crosses offshore dunes between manner) on engineered coasts with unnamed reef) boundary adjacent cells shore parallel structures without dunes to landward (only at Dawesville)
A marine An extension of marine extension An extension of marine Landward extent of section and beachface of the section and beachface R06B8b. A marine foredunes; point directly to the beachface point directly to the Lake Clifton extension of the -5m AHD isobath Lake Clifton onshore boundary if Cape point to the onshore boundary if North Landward extent of the beachface point closest to shore North there is no change in Bouvard offshore there is no change in to Cape frontal dune if the foredune to the offshore foredunes or frontal boundary foredunes or frontal Bouvard is eroded or absent boundary (majority) dunes between (line crosses dunes between adjacent cells unnamed adjacent cells reef)
An extension of marine An extension of marine A marine Landward extent of section and beachface section and beachface R06B8a. A marine extension foredunes; point directly to the point directly to the Preston extension of the of the -5m AHD isobath Preston onshore boundary if Lake Clifton onshore boundary if Beach North Landward extent of the beachface point beachface closest to shore Beach North there is no change in North there is no change in to Lake frontal dune if the foredune to the offshore point to the foredunes or frontal foredunes or frontal Clifton North is eroded or absent boundary offshore dunes between dunes between (majority) boundary adjacent cells adjacent cells
An extension of marine An extension of marine A marine R06B7a. Landward extent of section and beachface section and beachface A marine extension Lake foredunes; point directly to the point directly to the Lake extension of the of the Preston -5m AHD isobath onshore boundary if Preston onshore boundary if Landward extent of the Preston beachface point beachface South to closest to shore there is no change in Beach North there is no change in frontal dune if the foredune South to the offshore point to the Preston foredunes or frontal foredunes or frontal is eroded or absent boundary offshore Beach North dunes between dunes between (majority) boundary adjacent cells adjacent cells 91 92
“From” Alongshore Boundary “To” Alongshore Boundary Tertiary Cell Offshore Boundary Onshore Boundary Marine Marine Point Section Terrestrial Section Point Section Terrestrial Section
An extension of marine An extension of marine A marine R06B6b. Landward extent of section and beachface section and beachface A marine extension Myalup foredunes; point directly to the point directly to the extension of the Lake of the North -5m AHD isobath Myalup onshore boundary if onshore boundary if Landward extent of the beachface point Preston beachface to Lake closest to shore North there is no change in there is no change in frontal dune if the foredune to the offshore South point to the Preston foredunes or frontal foredunes or frontal is eroded or absent boundary offshore South dunes between dunes between (majority) boundary adjacent cells adjacent cells
An extension of marine An extension of marine A marine section and beachface section and beachface Landward extent of A marine extension R06B6a. point directly to the point directly to the foredunes; extension of the of the Binningup -5m AHD isobath onshore boundary if Myalup onshore boundary if Binningup beachface point beachface to Myalup closest to shore Landward extent of the there is no change in North there is no change in to the offshore point to the North frontal dune if the foredune foredunes or frontal foredunes or frontal boundary offshore is eroded or absent dunes between dunes between boundary adjacent cells adjacent cells
An extension of marine An extension of marine A marine section and beachface section and beachface Landward extent of A marine extension point directly to the point directly to the R06B5c. foredunes; extension of the of the -5m AHD isobath Buffalo onshore boundary if onshore boundary if Buffalo Road beachface point Binningup beachface closest to shore Landward extent of the Road there is no change in there is no change in to Binningup to the offshore point to the frontal dune if the foredune foredunes or frontal foredunes or frontal boundary offshore is eroded or absent dunes between dunes between boundary adjacent cells adjacent cells
An extension of marine An extension of marine A marine section and beachface section and beachface Landward extent of A marine extension R06B5b. point directly to the point directly to the foredunes; extension of the of the Leschenault -5m AHD isobath Leschenault onshore boundary if onshore boundary if beachface point Buffalo Road beachface South to closest to shore Landward extent of the South there is no change in there is no change in to the offshore point to the Buffalo Road frontal dune if the foredune foredunes or frontal foredunes or frontal boundary offshore is eroded or absent dunes between dunes between boundary adjacent cells adjacent cells
Landward extent of foredunes; Landward extent of the frontal dune if the foredune An extension of marine A marine is eroded or absent (local section and beachface R06B5a. A marine No terrestrial section extension erosion of foredunes); point directly to the Bunbury extension of the (would be central line of of the -5m AHD isobath Bunbury Leschenault onshore boundary if Harbour to Landgate MHWM to 2006 beachface point engineered structure if beachface closest to shore Harbour South there is no change in Leschenault on engineered coasts with to the offshore shoreline was mapped point to the foredunes or frontal South shore parallel structures boundary in a different manner) offshore dunes between without dunes to landward boundary adjacent cells (included harbour and neglected two inlets: 1. Storm surge barrier; 2. Leschenault inlet cut) “From” Alongshore Boundary “To” Alongshore Boundary Tertiary Cell Offshore Boundary Onshore Boundary Marine Marine Point Section Terrestrial Section Point Section Terrestrial Section
Landward extent of foredunes (majority); Landgate MHWM to 2006 An extension of marine for bluffed to cliffed coasts A marine section and beachface No terrestrial section R06A4b. without dunes; A marine extension point directly to the (would be central line Stirling extension of the of the -7m AHD isobath Landgate MHWM to 2006 Stirling onshore boundary if Bunbury of engineered structure Beach to beachface point beachface closest to shore on engineered coasts with Beach there is no change in Harbour if shoreline was Bunbury to the offshore point to the shore parallel structures foredunes or frontal mapped in a different Harbour boundary offshore without dunes to landward dunes between manner) boundary (Bunbury back beach to adjacent cells Bunbury Harbour with small section of foredune at the north)
An extension of marine An extension of marine A marine section and beachface section and beachface R06A4a. A marine extension point directly to the point directly to the Capel River Landward extent of extension of the of the -7m AHD isobath Capel River onshore boundary if Stirling onshore boundary if mouth to foredunes (Capel River beachface point beachface closest to shore Mouth there is no change in Beach there is no change in Stirling mouth is largely ignored) to the offshore point to the foredunes or frontal foredunes or frontal Beach boundary offshore dunes between dunes between boundary adjacent cells adjacent cells
An extension of marine An extension of marine Focal point A marine section and beachface section and beachface R06A3d. of sediment extension point directly to the point directly to the Forrest transport of the -7m AHD isobath Landward extent of Forrest onshore boundary if Capel River onshore boundary if Beach to convergence beachface closest to shore foredunes Beach there is no change in Mouth there is no change in Capel River on banks or point to the foredunes or frontal foredunes or frontal Mouth reefs (crest of offshore dunes between dunes between transverse bar) boundary adjacent cells adjacent cells
Centreline of an engineered structure or toe of a dredged Focal point An extension of marine area (Port of sediment section and beachface Landward extent of R06A3c. Geographe transport point directly to the foredunes (with areas of Wonnerup -7m AHD isobath eastern groyne); Forrest convergence onshore boundary if foredune erosion. Note that Wonnerup No terrestrial section to Forrest closest to shore Beach on banks or there is no change in Vasse-Wonnerup inlet is Focal point Beach reefs (crest foredunes or frontal largely ignored) of sediment transport of transverse dunes between convergence bar) adjacent cells on banks or reefs (crest of transverse bar) 93 94
“From” Alongshore Boundary “To” Alongshore Boundary Tertiary Cell Offshore Boundary Onshore Boundary Marine Marine Point Section Terrestrial Section Point Section Terrestrial Section
Centreline of an engineered structure An extension of marine or toe of a Landward extent of section and beachface dredged Focal point foredunes (majority); point directly to the area (Port of sediment onshore boundary if Geographe R06A3b. Landgate MHWM to 2006 transport -7m AHD isobath there is no change in eastern Busselton to on engineered coasts with Busselton convergence Wonnerup No terrestrial section closest to shore foredunes or frontal groyne); Wonnerup shore parallel structures on banks or dunes between without dunes to landward reefs (crest of Focal point adjacent cells (followed (Busselton town beach and transverse bar) of sediment Wonnerup) transverse bar transport alignment) convergence on banks or reefs (crest of transverse bar)
An extension of marine An extension of marine section and beachface Focal point section and beachface Focal point point directly to the of sediment point directly to the of sediment R06A3a. onshore boundary if transport onshore boundary if Landward extent of transport Norman -7m AHD isobath Norman there is no change in convergence there is no change in foredunes (drains are largely convergence Busselton Road to closest to shore Road foredunes or frontal on banks or foredunes or frontal ignored) on banks or Busselton dunes between reefs (crest dunes between reefs (crest of adjacent cells (followed of transverse adjacent cells (followed transverse bar) transverse bar bar) transverse bar alignment) alignment)
An extension of marine An extension of marine Focal point section and beachface Focal point section and beachface of sediment point directly to the of sediment R06A2d. point directly to the transport onshore boundary if Landward extent of transport Marybrook -7m AHD isobath onshore boundary if Norman convergence there is no change in foredunes (drains are largely Marybrook convergence to Norman closest to shore there is no change in Road on banks or foredunes or frontal ignored) on banks or Road foredunes or frontal reefs (crest dunes between reefs (crest of dunes between of transverse adjacent cells (followed transverse bar) adjacent cells bar) transverse bar alignment)
An extension of marine Focal point An extension of marine Focal point section and beachface of sediment section and beachface of sediment R06A2c. point directly to the transport point directly to the Landward extent of transport Point -7m AHD isobath Point onshore boundary if convergence onshore boundary if foredunes (drains are largely convergence Marybrook Templar to closest to shore Templar there is no change in on banks or there is no change in ignored) on banks or Marybrook foredunes or frontal reefs (crest foredunes or frontal reefs (crest of dunes between of transverse dunes between transverse bar) adjacent cells bar) adjacent cells “From” Alongshore Boundary “To” Alongshore Boundary Tertiary Cell Offshore Boundary Onshore Boundary Marine Marine Point Section Terrestrial Section Point Section Terrestrial Section
Focal point An extension of marine of sediment section and beachface A marine R06A2b. transport point directly to the Landward extent of extension of the Point Daking -5m AHD isobath Point convergence onshore boundary if foredunes (drains are largely Point Daking beachface point No terrestrial section to Point closest to shore Templar on banks or there is no change in ignored) to the offshore Templar reefs (crest foredunes or frontal boundary of transverse dunes between bar) adjacent cells
Landward extent of A marine A marine extension R06A2a. foredunes; extension of the of the Point Piquet -5m AHD isobath Landgate MHWM to 2006 Point Piquet beachface point No terrestrial section Point Daking beachface No terrestrial section to Point closest to shore for bluffed to cliffed coasts to the offshore point to the Daking without dunes (majority is boundary offshore cliffed) boundary
A marine R06A1a. Landward extent of A marine extension Cape foredunes; extension of the of the -5m AHD isobath Cape Naturaliste beachface point No terrestrial section Point Piquet beachface No terrestrial section closest to shore Landgate MHWM to 2006 Naturaliste to Point for bluffed to cliffed coasts to the offshore point to the Piquet without dunes boundary offshore boundary
Rottnest Island
An extension of marine An extension of marine section and beachface Focal point section and beachface Focal point R06DRI4b. point directly to the of sediment point directly to the Landward extent of the of sediment Bathurst -5m AHD isobath Bathurst onshore boundary if transport onshore boundary if frontal dune if the foredune transport Philip Point Point to closest to shore Point there is no change in convergence there is no change in is eroded or absent convergence on Philip Point foredunes or frontal on banks or foredunes or frontal banks or reefs dunes between reefs dunes between adjacent cells adjacent cells
An extension of marine An extension of marine section and beachface Focal point section and beachface Focal point R06DRI4a. point directly to the of sediment point directly to the Landward extent of the of sediment North Point -5m AHD isobath onshore boundary if Bathurst transport onshore boundary if frontal dune if the foredune North Point transport to Bathurst closest to shore there is no change in Point convergence there is no change in is eroded or absent convergence on Point foredunes or frontal on banks or foredunes or frontal banks or reefs dunes between reefs dunes between adjacent cells adjacent cells
An extension of marine An extension of marine section and beachface Focal point section and beachface Focal point R06DRI3c. point directly to the of sediment point directly to the Landward extent of the of sediment Rocky Bay -5m AHD isobath onshore boundary if transport onshore boundary if frontal dune if the foredune Rocky Bay transport North Point to North closest to shore there is no change in convergence there is no change in is eroded or absent convergence on Point foredunes or frontal on banks or foredunes or frontal banks or reefs dunes between reefs dunes between adjacent cells adjacent cells 95 96
“From” Alongshore Boundary “To” Alongshore Boundary Tertiary Cell Offshore Boundary Onshore Boundary Marine Marine Point Section Terrestrial Section Point Section Terrestrial Section
Focal point of sediment An extension of marine An extension of marine transport section and beachface Focal point section and beachface R06DRI3b. convergence on point directly to the of sediment point directly to the Landward extent of the Abraham -5m AHD isobath Abraham banks or reefs; onshore boundary if transport onshore boundary if frontal dune if the foredune Rocky Bay Point to closest to shore Point there is no change in convergence there is no change in is eroded or absent A marine Rocky Bay extension of the foredunes or frontal on banks or foredunes or frontal beachface point dunes between reefs dunes between to the offshore adjacent cells adjacent cells boundary
Focal point of sediment Central line, watershed or transport An extension of marine An extension of marine ridge line on promontories convergence section and beachface section and beachface R06DRI3a. or islands (Ridge line from Focal point on banks or point directly to the point directly to the Cape Vlamingh Head to Conical of sediment reefs; -5m AHD isobath Cape onshore boundary if Abraham onshore boundary if Vlamingh Hill); transport A marine closest to shore Vlamingh there is no change in Point there is no change in to Abraham convergence on extension Landward extent of the foredunes or frontal foredunes or frontal Point banks or reefs of the frontal dune if the foredune dunes between dunes between beachface is eroded or absent (Conical adjacent cells adjacent cells Hill to Abraham Point) point to the offshore boundary
Central line, watershed or ridge line on promontories An extension of marine An extension of marine or islands (Ridge line from section and beachface Focal point section and beachface Focal point R06DRI2c. Conical Hill to Vlamingh point directly to the of sediment point directly to the of sediment South Point -5m AHD isobath Head); onshore boundary if Cape transport onshore boundary if South Point transport to Cape closest to shore there is no change in Vlamingh convergence there is no change in Landward extent of the convergence on Vlamingh foredunes or frontal on banks or foredunes or frontal frontal dune if the foredune banks or reefs is eroded or absent (Dunes dunes between reefs dunes between defined from northwest for adjacent cells adjacent cells South Point to Conical Hill)
An extension of marine An extension of marine section and beachface Focal point section and beachface Focal point R06DRI2b. Landward extent of the point directly to the of sediment point directly to the of sediment Kitson Point -5m AHD isobath frontal dune if the foredune onshore boundary if transport onshore boundary if Kitson Point transport South Point to South closest to shore is eroded or absent (dunes there is no change in convergence there is no change in convergence on Point from northwest) foredunes or frontal on banks or foredunes or frontal banks or reefs dunes between reefs dunes between adjacent cells adjacent cells “From” Alongshore Boundary “To” Alongshore Boundary Tertiary Cell Offshore Boundary Onshore Boundary Marine Marine Point Section Terrestrial Section Point Section Terrestrial Section
Landward extent of the frontal dune if the foredune is eroded or absent (Parker Point to Fairbridge Bluff); An extension of marine An extension of marine Central line, watershed or section and beachface Focal point section and beachface Focal point R06DRI2a. ridge line on promontories point directly to the of sediment point directly to the of sediment Parker Point -5m AHD isobath or islands (Ridge line from onshore boundary if transport onshore boundary if Parker Point transport Kitson Point to Kitson closest to shore Fairbridge Bluff to NW of there is no change in convergence there is no change in convergence on Point Oliver Hill); foredunes or frontal on banks or foredunes or frontal banks or reefs Landward extent of the dunes between reefs dunes between frontal dune if the foredune adjacent cells adjacent cells is eroded or absent (defined from northwest dunes, NW Oliver Hill to Kitson Point)
An extension of marine An extension of marine section and beachface Focal point section and beachface Focal point R06DRI1b. point directly to the of sediment point directly to the Landward extent of the of sediment Bickley Point -5m AHD isobath onshore boundary if transport onshore boundary if frontal dune if the foredune Bickley Point transport Parker Point to Parker closest to shore there is no change in convergence there is no change in is eroded or absent convergence on Point foredunes or frontal on banks or foredunes or frontal banks or reefs dunes between reefs dunes between adjacent cells adjacent cells
An extension of marine An extension of marine section and beachface Focal point section and beachface Focal point R06DRI1a. point directly to the of sediment point directly to the Landward extent of the of sediment Philip Point -5m AHD isobath onshore boundary if transport onshore boundary if frontal dune if the foredune Philip Point transport Bickley Point to Bickley closest to shore there is no change in convergence there is no change in is eroded or absent convergence on Point foredunes or frontal on banks or foredunes or frontal banks or reefs dunes between reefs dunes between adjacent cells adjacent cells
Garden Island
Toe of terrace or Landward extent of Focal point R06DGI3a. Fixed by rock sediment bank (toe of foredunes; of sediment Centreline of Parkin Point Parkin Point outcrops or bank and also in parts transport engineered structure or Collie Head No terrestrial section spit to Collie Central line, watershed or spit islands (rock mapped to a ridge for convergence on feature (road) Head ridge line on promontories outcrop) mid-southern flats) or islands (road) banks or reefs
Landward extent of Focal point R06D14d. foredunes; Fixed by rock of sediment Collie Head -7m AHD isobath outcrops or transport Collie Head No terrestrial section Baudin Point No terrestrial section to Baudin closest to shore Landgate MHWM to 2006 islands (rock convergence Point for bluffed to cliffed coasts outcrop) on banks or without dunes reefs 97 98
“From” Alongshore Boundary “To” Alongshore Boundary Tertiary Cell Offshore Boundary Onshore Boundary Marine Marine Point Section Terrestrial Section Point Section Terrestrial Section
A marine An extension of extension marine section and of the -7m AHD isobath Focal point beachface point R06DGI4a. beachface closest to shore; of sediment directly to the onshore Baudin Point Landward extent of point to the Baudin Point transport No terrestrial section Buache Bay boundary if there is no to Buache Subtidal seaward foredunes offshore convergence on change in foredunes Bay margin of rock boundary banks or reefs or frontal dunes platform (to centre of between adjacent cells submarine (orthogonal to coast) embayment)
Landward extent of An extension of foredunes; A marine marine section and Landward extent of the extension of the -7m AHD isobath beachface point Fixed by rock R06DGI4b. frontal dune if the foredune beachface point closest to shore; directly to the onshore outcrops or Buache Bay is eroded or absent; to the offshore Buache Bay boundary if there is no Point Atwick islands (toe No terrestrial section to Point Subtidal seaward boundary Landgate MHWM to 2006 change in foredunes of en-echelon Atwick margin of rock (to centre of for bluffed to cliffed coasts or frontal dunes rock ridge) platform submarine without dunes (for the between adjacent cells embayment) northern 350m, MHWM to (orthogonal to coast) 2006 at Point Atwick)
-7m AHD isobath Landward extent of Fixed by rock R06DGI4c. closest to shore; foredunes; outcrops or Fixed by rock Point Atwick Entrance Point Atwick islands (toe of No terrestrial section outcrops or No terrestrial section to Entrance Subtidal seaward Landgate MHWM to 2006 Point en-echelon rock islands Point margin of rock for bluffed to cliffed coasts platform without dunes ridge)
Landward extent of A marine R06DGI4d. foredunes; extension Entrance Fixed by rock of the -5m AHD isobath Entrance Beacon Point to Landgate MHWM to 2006 outcrops or No terrestrial section beachface No terrestrial section closest to shore Point Head Beacon for bluffed to cliffed coasts islands point to the Head without dunes (cliffed coast offshore at boundaries) boundary
Focal point R06DGI4e. A marine of sediment Beacon extension of the -5m AHD isobath Landward extent of Beacon Second transport Head to beachface point No terrestrial section No terrestrial section closest to shore foredunes Head Head convergence Second to the offshore on banks or Head boundary reefs “From” Alongshore Boundary “To” Alongshore Boundary Tertiary Cell Offshore Boundary Onshore Boundary Marine Marine Point Section Terrestrial Section Point Section Terrestrial Section
Centreline of an engineered R06DGI4f. Focal point structure Centreline of Second of sediment Toe of terrace or Landward extent of Second Armaments or toe of a engineered structure Head to transport No terrestrial section sediment bank foredunes Head Jetty dredged area or feature (extension of Armaments convergence on (Armaments Armaments Jetty) Jetty banks or reefs Jetty and dredged basin)
Centreline Centreline of of an an engineered engineered R06EGI1a. structure Centreline of structure Armaments Toe of terrace or Landward extent of Armaments or toe of a engineered structure Cliff Point or toe of a No terrestrial section Jetty to Cliff sediment bank foredunes Jetty dredged area or feature (extension of dredged Point (Armaments Armaments Jetty) area (edge Jetty and of dredged dredged basin) basin)
A marine Centreline of extension R06EGI1b. an engineered of the Centreline of Cliff Point Toe of terrace or Landward extent of structure or toe Colpoys Cliff Point No terrestrial section beachface engineered structure or to Colpoys sediment bank foredunes of a dredged Point point to the feature (groyne) Point area (edge of offshore dredged basin) boundary
R06EGI2a. Focal point A marine Colpoys of sediment extension of the Centreline of Centreline of Point to Toe of terrace or Landward extent of Colpoys Parkin Point transport beachface point engineered structure or engineered structure or Parkin Point sediment bank foredunes Point spit convergence to the offshore feature (groyne) feature (road) spit (extends on banks or boundary into GI4) reefs 99 CONTACT Department of Transport 1 Essex Street Fremantle WA 6160 Telephone: (08) 9435 7527 Website: www.transport.wa.gov.au Email: [email protected]
The information contained in this publication is provided in good faith and believed to be accurate at time of publication. The State shall in no way be liable for any loss sustained or incurred by anyone relying on the information. 09/2015
DoT 1484-27-06