Greater risk assessment and draft priority rankings for stakeholder discussion (urban centres) Community input is needed to prioritise where flood knowledge needs to be improved through flood studies and flood mapping in Greater Shepparton and to determine actions to reduce the risk of flooding. This summary provides a list of studies for towns in Greater Shepparton and draft priorities for flood mitigation actions. How to read the table below The column to the left ranks flood risks (1: low, and 5: high), taking into account the possible damage from different sized floods and how often they are expected to happen. The measure of the yearly average cost of floods is known as Annual Average Damage (AAD). The two columns in the centre of the table show: • Flood studies that have been (or soon will be) completed for towns in your local government area. • Recommendations from these studies that have been implemented (or are under way) and other relevant comments or observations. The columns to the right of the table show DRAFT priority rankings [Low (L), Medium (M), High (H) and No Action (-)] for actions that reduce risk of flooding such as: • Mitigation works (e.g. levees, retardation basin, and floodways) • Flood warning systems (e.g. flood watch, flood warning broadcasts and action plans) • Land use planning (e.g. flood overlay control in planning schemes) • Municipal flood emergency plans (developed by council, VICSES and other agencies with flood-management responsibilities) Please review this summary and provide feedback by: • attending one of the community sessions being held across the catchment during February; or • completing the feedback form on the website www.gbcma.vic.gov.au Terminology Annual Average Damage (AAD), expressed in dollar terms, is the average damage per year that would occur in a particular area from flooding over a very long period of time. This provides a basis for comparing the economic effectiveness of different projects. For more information on risk assessment methodology, please see the Regional Floodplain Management Strategy section of the website. Annual Exceedance Probability (AEP) is the likelihood of occurrence of a flood of given size or larger occurring in any one year. FloodSafe is a whole community program designed to prepare and empower the community with the skills and knowledge to appropriately prepare for, respond to, and recover from floods. Municipal Flood Emergency Plan (MFEP) is a plan prepared and maintained by each municipal council, under the Emergency Management Act 1986, which identifies the municipal resources available, and how they are to be used, for flood prevention, response and recovery. Regional Floodplain Management Strategy (RFMS) (under development) will replace the previous regional strategy (2002) and aims to help manage flood risk by seeking community input to prioritise where flood knowledge needs to be improved. The priorities will be detailed in a rolling three-year regional work plan that can be used by local communities to secure funding for various flood management activities.

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Figure 1. Greater Shepparton area showing towns and planning scheme flood overlay controls

Page 2 of 5 Table 2. Greater Shepparton risk assessment (ranking 1: low, and 5: high) Draft priority rankings for stakeholder discussion: Low (L), Medium (M), High (H) and No Action (-) (for urban centres)

Summary of implemented study recommendations Name AAD Summary of past and existing studies

(Other comments) Works Planning Land Use Use Land Mitigation Mitigation Total Flood Municipal Flood Warning System Emergency Plans • Documentation and Review of the 1993 Victorian • Potential flood impact from levee failure/overtopping upstream Floods Volume 5 Lower Goulburn River Floods of town (Hydro Technology, 1995) • Potential flood impacts from Loch Garry boards being removed • Lower Goulburn Floodplain Rehabilitation • Flood warning arrangements augmented by Goulburn Murray Bunbartha 1 Scheme (Water Technology, 2005) Water. Also from Greater Shepparton to Daintons Bridge - - L - (Shepparton Gauge provide the triggers for Loch Garry board removal operation)

• Flooding of Tongala-Stanhope Irrigation District - • Available data indicates Mosquito Depression (to the west of March 1950 & Recommendations for Improving Cooma) does not impact on the Cooma Cooma 1 the Surface Drainage (SR&WSC, 1951) • No further action - - - -

• Murchison Flood Mapping Study Report (Water • New flood controls need to be incorporated into planning scheme Technology, 2015) • MFEP update East 1 • MFEP update provided (Water Technology) • FloodSafe Guide prepared - L H - Murchison • Flood Warning Services to Murchison in place

East • Peak 2013 flood levels captured • Nil 5 - - H H Shepparton • Flood Study (BMTWBM) final draft completed • Nil • Not subject to riverine flooding • Flood overlay controls are required as evident by captured 2012 peak flood levels Katandra • Scoping flood study is required with a focus of improved flood 0 - - H - West mapping • FloodSafe Guide prepared • Flood intelligence in MFEP

Kialla West 1 • This now part of the Shepparton • See Shepparton Mooroopna - - - - Flood Intelligence Study Page 3 of 5

Summary of implemented study recommendations Name AAD Summary of past and existing studies

(Other comments) Works Planning Land Use Use Land Mitigation Mitigation Total Flood Municipal Flood Warning System Emergency Plans • Flood Study (WBM, 2005) • Planning flood controls, incorporated into planning scheme • 1% AEP flood levels declared Merrigum 3 • MFEP updated - - - L • Flood warning relies on BoM products such as flood watch • FloodSafe Guide should be considered Murchison 1 • See “East Murchison” above • See East Murchison - L H H • Shepparton-Mooroopna Flood Study 2 volumes • Large length of GMW Irrigation Channel 19/12 along Wanganui (Sinclair Knight Partners, 1982) Road has been placed underground (circa mid 1980s) • Shepparton-Mooroopna Flood Mitigation Design • Several properties purchased by RWC within low-lying areas along – Report on Works Options, Draft Discussion River Road between Shepparton and Mooroopna Document on Options, and Assessment of Levee • Proposed new urban levees abandoned in 1997 due to lack of Options – Summary Report and Appendices agreement (Sinclair Knight & Partners (1986, 1987 & 1989) • Total Flood Warning System implemented in 2007 – including • Mooroopna Flood Mitigation Scheme (RWC, flood warning service by BoM and community information 1989) • MFEP updated 2007 • Documentation and Review of the 1993 Victorian • Flood zone and overlay controls incorporated into planning Floods Volume 5 Lower Goulburn River Floods scheme in 2004 (Hydro Technology, 1995) • 1% AEP flood levels declared. • Mooroopna Water Management Scheme: • MFEP, mapping, flood levels and community intelligence require Shepparton/ 5 Proposed Mooroopna Levees – Report on updating upon completion of the latest study. - - H H Mooroopna Submissions to Exhibited Scheme Document • FloodSafe Guide prepared in 2014. (NRE, 1997) • Shepparton-Mooroopna Floodplain Management Scoping Study – Final Report (Sinclair Knight Merz, 1998). • Shepparton Mooroopna Floodplain Management Study – Stage 1 Technical Report (SKM, 2002) • Shepparton Mooroopna Floodplain Management Study – Stage 2 Technical Report (SKM, 2002) • Greater Shepparton City Council Flood Warning and Emergency Management Project (Water Technology, 2007) • Shepparton Mooroopna Flood Intelligence and Mapping Study (Water Technology – ongoing)

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Summary of implemented study recommendations Name AAD Summary of past and existing studies

(Other comments) Works Planning Land Use Use Land Mitigation Mitigation Total Flood Municipal Flood Warning System Emergency Plans • Documentation and Review of the 1993 Victorian • FloodSafe Guide prepared Floods. Volume 4 – Broken River Catchment • Flood intelligence in MFEP Tally- 1 Floods (Hydro Technology, (1995) • Flood controls needs updating M - H - garoopna • Recorded 2012 peak flood levels

• Mosquito Drain 36 ( Bypass Drain) • Flood control integrated into planning scheme Concept Report (SKM, 1999) • 1% AEP flood levels declared • Tatura Floodplain Management Plan (WBM, • Civil mitigation works implemented (railway culverts, 2006) Road culvert, lowering pathway and Retardation Basin Tatura 5 embankment) - - - - • Council remains committed is managing civil works • Mapping in MFEP • No specific flood warning – rely on Flood Watch products from BoM • Nil • Desktop review of LiDAR (ground level) data indicates a low-lying depression exist that would flood from the Goulburn River, Toolamba 1 otherwise the town is well above flood level - L M M • Require new flood overlay controls • Further desktop study to determine need for TFWS, MFEP

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