Cover Photograph: Lyme Regis, February 2014 Taken by: E.Siggery, Plymouth Coastal Observatory.
Annual Survey Report Lizard Point to Land’s End 2014
Plymouth Coastal Observatory University of Plymouth Drake Circus Plymouth PL4 8AA Tel: +44 (0)1752 586156 e-mail: [email protected] Website: www.channelcoast.org
Document Title: Annual Report 2014 Lizard Point to Land’s End
Reference: AR 42
Status: Final
Date: October 2014
Project Name: South West Regional Coastal Monitoring Programme
Author: J.Kirby
Checked By: E.Siggery Annual Survey Report Lizard Point to Land’s End 2014
Winter Storms 2013-2014
Please note that this report details changes between scheduled spring interim surveys. Where scheduled surveys took place before or during the storms in early 2014 analysis may not be indicative of post-storm damage.
Survey dates for each location are given in Annex E.
For an analysis of post-storm change and subsequent rates of recovery please see the following reports:
x Review of South West Coast Beach Response to Wave Conditions During the Winter of 2013-2014 x South West Beach Recovery Since Winter 2013-2014
All reports are available from our website www.channelcoast.org/southwest Annual Survey Report Lizard Point to Land’s End 2014
South West Regional Coastal Monitoring Programme
Annual Report 2014 – Lizard Point to Land’s End
1. Introduction
Analysis presented in this report provides an overview of beach changes and wave and tidal measurements since the commencement of the South West Regional Coastal Monitoring Programme. The first beach surveys took place during the spring of 2007 and changes are reported until the spring interim surveys of 2014. This provides a short time base over which beach changes have been monitored. Detailed interpretation and decision-making is not advisable on the basis of these short-term changes, since the changes may not be representative of longer-term trends.
Data are presented at several levels: • Process cell summary of percentage and actual profile change from 2013 to 2014 • Process cell summary of percentage and actual profile change from 2007 to 2014 • Detailed beach profile change from 2013 to 2014 • Detailed beach profile change from 2007 to 2014 • Topographic difference model from 2013 to 2014 and 2007 to 2014 • Change in position of Mean High Water • Beach sediment distribution • Time series of beach profile graphs (on CD) • Trend analysis of beach cross-sectional area (on CD)
The process cell summary maps provide an at-a-glance summary of the changes during the past year and over the longer term. It is recommended that the user should use the maps to identify areas of interest and then examine the individual profile plots and trends. Colour- coded lines highlight areas of maximum change and identify profiles which might need closer examination.
It must be noted that the colour coded lines are based on actual change as opposed to percentage change as is the case with similar reports published by the South East Regional Coastal Monitoring Programme. Percentage change is displayed in brackets following the profile name on each line.
Difference models have been produced where there are at least two baseline surveys to compare. In addition, LiDAR data has been used to extract the level of Mean High Water (MHW) from each survey unit.
It must be appreciated that the accuracies of each measurement system must be taken into account when drawing conclusions, particularly from the difference models. In the case of topographic difference models from RTK GPS surveys, the accuracy of each data point is ±0.03m and therefore differences of ±0.06m can generally be considered as "real", whilst smaller changes may be an artefact of the measuring system, and are considered to be "No Change". Difference plots show changes >±0.25m, which should be indicative of areas of genuinely measurable change. Smaller changes may also be present but these are filtered from the analysis to provide clarity. This report displays difference models only where detailed analysis suggests that the changes are real but, nevertheless, the user should approach the results as indicative, unless reinforced overtime or with other information. Annual Survey Report Lizard Point to Land’s End 2014
Where LiDAR has provided the source data sets, the modelling is less precise. Each LiDAR cell value has a plan position representative of a 1m2 grid. It is not reasonable to expect to observe changes with positional accuracy of better than 1-2m therefore. Profiles of steep slopes may suggest that the changes “bounce” back and forth. This is an artefact of the accuracy of the source data. LiDAR is particularly ineffective at identifying sharp edges or steep slopes e.g. cliffs, seawalls. Despite these limitations in accuracy the changes shown indicate an overview of beach change, but to a lower precision than the RTK data. The location of the regularly surveyed profiles superimposed on the difference plots indicates how representative these profiles might be of overall changes.
It must be emphasised that this is only the sixth report of a series and that changes identified are indicative only of short-term trends. As the Programme progresses, more detailed and meaningful reporting will be possible and this report should be treated accordingly.
2. Hydrodynamic data a. Waves A Directional WaveRider buoy was deployed at Penzance on the 7th April 2007. A Directional WaveRider buoy was deployed at Porthleven on the 16th October 2011.
The full wave reports are given at Annex A.
b. Tides There are no Regional Monitoring Programme tide gauges between Lizard Point and Land’s End.
3. Survey data – topographic
Over the past year every survey unit within the sub-cell has experienced erosion. High level erosion has occurred in 9 out of 13 of the survey units. Where accretion has occurred it tends towards medium to high level material gains. In terms of percentage change, there is a mixture of loss of cross-sectional area and stability observed across the sub-cell, with very few instances of cross-sectional area increase. Major changes are seen in survey units 6eSU6- 2 and 6eSU8-2.
Longer term, a mixture of stability, accretion and erosion can be seen, with erosion being the most dominant. The western survey units exhibit both erosion and accretion, as well as areas of long term stability. Survey units 6eSU4-6 and 6eSU4-5 have shown an increase in cross- sectional area across all profiles. Similarly to the year on year analysis, survey unit 6eSU6-2 lost material since 2007 across all profiles.
Dates of surveys are shown in Annex E and the detailed topographic survey report is given at Annex F.
4. Survey data – bathymetric
No further bathymetric analysis will be carried out until after the next bathymetric baseline survey. Annual Survey Report Lizard Point to Land’s End 2014
Annex A Interim Wave Report Annex B N/A Annex C N/A Annex D N/A Annex E High Level Report – field data collection (CISCAG) Annex F Topographic Survey Report for Lizard Point to Land’s End Annex G N/A Explanatory Notes Annex A Interim Wave Report Porthleven 2013/14
Porthleven Directional Waverider Buoy
Location OS: 163360E 23297N WGS84: Latitude: 50° 03.756' N Longitude: 05° 18.471' W
Water Depth ~15 m CD
Instrument Type Datawell Directional Waverider Mk III
Data Quality
Recovery rate (%) Sample interval 92 30 minutes
Monthly Statistics – 2013/14 All times are GMT
Hs Tp Tz Dir. SST No. of Month (m) (s) (s) (o) (oC) days July 0.64 9.7 4.7 217 15.9 31 August 0.78 9.0 4.8 237 16.3 31 September 0.81 9.4 5.1 236 15.4 30 October 1.57 9.8 5.7 234 15.1 31 November 1.17 11.1 6.3 241 12.5 30 December 2.35 11.5 6.2 232 11.2 31 January 2.40 11.8 6.3 235 10.0 30 February 3.38 12.1 6.8 230 9.3 4 March 1.24 11.5 6.0 238 9.5 27 April 1.12 10.7 5.6 232 10.5 30 May 0.87 9.0 5.1 239 12.3 31 June 0.71 9.1 4.8 225 14.6 30
Storm Analysis
Tidal Water level Tidal Tidal Max. Hs Tp Tz Dir. stage Date/Time elevation* range surge* surge* (m) (s) (s) (o) (hours re. (OD) (m) (m) (m) HW) 03-Jan-2014 6.99 15.4 9.5 236 2.75 HW +1 5.0 0.14 0.45 18:30 06-Jan-2014 6.79 20.0 9.8 228 2.32 HW 3.9 0.29 0.47 21:00 05-Feb-2014 6.46 13.3 9.5 215 -0.89 HW +6 4.2 0.76 0.86 01:30 24-Dec-2013 6.43 12.5 8.9 228 2.01 HW 3.1 0.26 0.51 09:00 26-Apr-2014 5.36 12.5 8.2 228 1.31 HW -2 3.9 0.39 0.45 12:30
* Tidal information is obtained from the nearest recording tide gauge (the National Network gauge at Newlyn). The surge shown is the residual at the time of the highest Hs. The maximum tidal surge is the largest surge during the storm event. Annex A Interim Wave Report Porthleven 2013/14
Distribution plots
The distribution of wave parameters are shown in the accompanying graphs of:
x Wave rose (percentage of occurrence of Direction vs. Hs) for all measured data x Percentage of occurrence of Hs, Tp, Tz and Direction from July 2013 to June 2014 x Monthly time series of Hs (red line is 5.25 m storm threshold) x Incidence of storms during the reporting period and for all previous years. Storm events are defined using the Peaks-over-Threshold method. The highest Hs of each storm event is shown
Summary
By far the largest and most frequent storms since the deployment of the buoy occurred during this reporting period, with the previous highest wave height being exceeded on 4 separate storms. The two largest storms in early January were accompanied by long period waves up to 25 seconds at times, and at or close to High Water. The buoy became unserviceable in early February and accordingly there are no measurements from the mid-February and early March storms.
General
The buoy was first deployed on 17 October 2011.
Acknowledgements
Tidal data were supplied by the British Oceanographic Data Centre as part of the function of the National Tidal and Sea Level Facility, hosted by the Proudman Oceanographic Laboratory and funded by DEFRA and the Natural Environment Research Council. Annex A Interim Wave Report Porthleven 2013/14
Offshore Wave Hs (m) Por thleven WB : 17/10/2011 - 30/06/2014
0 345 15
330 30 >= 0.00 < 0.50 (m)
315 45 >= 0.50 < 1.00 (m)
>= 1.00 < 1.50 (m) 300 60
>= 1.50 < 2.00 (m)
285 75 >= 2.00 < 2.50 (m)
>= 2.50 < 3.00 (m)
270 2% 90 >= 3.00 < 3.50 (m)
>= 3.50 < 4.00 (m) 255 105 >= 4.00 < 4.50 (m)
240 120 >= 4.50 < 5.00 (m)
>= 5.00 < 5.50 (m) 225 135
>= 5.50 < 6.00 (m) 210 150
195 165 >= 6.00 <998.00 (m) 180 0 10 20 30 Annex A Interim Wave Report Porthleven 2013/14 Annex A Interim Wave Report Porthleven 2013/14 Annex A Interim Wave Report Porthleven 2013/14 Annex A Interim Wave Report Penzance 2013/14
Penzance Directional Waverider Buoy
Location OS: 149662E 29688N WGS84: Latitude: 50° 06.862' N Longitude: 05° 30.184' W
Water Depth ~10 m CD
Instrument Type Datawell Directional Waverider Mk III
Data Quality
Recovery rate (%) Sample interval 99 30 minutes
Monthly Statistics – 2013/14 All times are GMT
Hs Tp Tz Dir. SST No. of Month (m) (s) (s) (o) (oC) days July 0.40 7.4 3.9 173 13.4 31 August 0.37 8.1 4.2 182 13.3 31 September 0.40 8.2 4.2 183 12.5 30 October 0.91 7.9 4.5 177 11.9 31 November 0.50 10.2 4.6 194 9.3 30 December 1.28 9.5 5.1 186 7.8 31 January 1.19 10.3 5.2 185 6.6 31 February 1.64 11.0 5.5 186 5.7 27 March 0.68 10.5 4.7 180 5.7 31 April 0.66 8.6 4.7 178 6.9 30 May 0.39 7.4 4.2 179 8.3 31 June 0.41 7.2 3.9 169 13.3 30
Storm Analysis
Tidal Water level Tidal Tidal Max. Hs Tp Tz Dir. stage Date/Time elevation* range surge* surge* (m) (s) (s) (o) (hours re. (OD) (m) (m) (m) HW) 04-Feb-2014 6.06 10.0 8.3 179 2.73 HW -1 4.8 0.79 0.87 19:00 14-Feb-2014 5.98 16.7 9.3 190 -0.23 HW +4 4.5 0.53 0.96 21:00 24-Dec-2013 4.24 13.3 9.3 184 -0.31 HW +5 3.3 0.46 0.75 01:00 03-Feb-2014 4.19 10.5 7.8 183 -1.03 HW +5 5.5 0.51 0.57 12:00 18-Dec-2013 3.54 9.1 6.5 190 2.64 HW 4.3 0.47 0.50 17:30
* Tidal information is obtained from the nearest recording tide gauge (the National Network gauge at Newlyn). The surge shown is the residual at the time of the highest Hs. The maximum tidal surge is the largest surge during the storm event. Annex A Interim Wave Report Penzance 2013/14
Distribution plots
The distribution of wave parameters are shown in the accompanying graphs of:
x Wave rose (percentage of occurrence of Direction vs. Hs) for all measured data x Percentage of occurrence of Hs, Tp, Tz and Direction from July 2013 to June 2014 x Monthly time series of Hs (red line is 3.5 m storm threshold) x Incidence of storms during the reporting period and for all previous years. Storm events are defined using the Peaks-over-Threshold method. The highest Hs of each storm event is shown
Summary
By far the largest storms recorded since the deployment of the buoy occurred during this reporting period. Two storms had significant wave heights of around 6m on 04 and 14 February 2014. The former occurred closer to high tide while the latter was accompanied by longer period waves of around 17 seconds. Due to the extreme nature of the storm on 14 February some data gaps are present around the peak of this storm since the buoy was in breaking waves.
General
The buoy was first deployed on 06 April 2007.
Acknowledgements
The shore station is kindly hosted by Penzance Harbourmaster. Tidal data were supplied by the British Oceanographic Data Centre as part of the function of the National Tidal and Sea Level Facility, hosted by the Proudman Oceanographic Laboratory and funded by DEFRA and the Natural Environment Research Council. Annex A Interim Wave Report Penzance 2013/14
Offshore Wave Hs (m) Penzance WB : 06/04/2007 - 30/06/2014
0 345 15
330 30 >= 0.00 < 0.50 (m)
315 45 >= 0.50 < 1.00 (m)
>= 1.00 < 1.50 (m) 300 60
>= 1.50 < 2.00 (m)
285 75 >= 2.00 < 2.50 (m)
>= 2.50 < 3.00 (m)
270 19% 90 >= 3.00 < 3.50 (m)
>= 3.50 < 4.00 (m) 255 105 >= 4.00 < 4.50 (m)
240 120 >= 4.50 < 5.00 (m)
>= 5.00 < 5.50 (m) 225 135
>= 5.50 < 6.00 (m) 210 150
195 165 >= 6.00 <998.00 (m) 180 0 20 40 Annex A Interim Wave Report Penzance 2013/14 Annex A Interim Wave Report Penzance 2013/14 Annex A Interim Wave Report Penzance 2013/14 Annex E Lizard Point to Land’s End 2014
South West Regional Coastal Monitoring Programme Field Data Collection – CISCAG Topographic Data
Year 7 (2012/2013) Year 8 (2013/2014) Year 9 (2014/2015) Sub Cell Survey Unit Spring Interim 2013 BMP 2013 Spring Interim 2014 Post-Storm BMP 2014 Target Completion Target Completion Target Completion Completion Target Completion
SU3-2 31/03/2013 27/06/2013 31/03/2014 16/01/2014 SU3-4 31/03/2013 27/06/2013 31/03/2014 17/01/2014 SU3-6 31/03/2013 27/06/2013 31/03/2014 24/03/2014 SU4-3 31/03/2013 14/03/2013 31/03/2014 28/03/2014 SU4-4 31/03/2013 15/03/2013 31/08/2013 22/08/2013 31/03/2014 28/03/2014 21/01/2014 31/08/2014 16/07/2014 SU4-5 31/03/2013 13/03/2013 31/03/2014 31/03/2014 6e SU4-6 31/03/2013 12/03/2013 31/03/2014 31/03/2014 SU6-2 31/03/2013 28/06/2013 31/08/2013 20/09/2013 31/03/2014 15/04/2014 31/08/2014 13/07/2014
SU8-2 31/03/2013 26/06/2013 31/03/2014 27/03/2014 SU9-2 31/03/2013 26/06/2013 31/03/2014 27/03/2014 SU10-1 31/03/2013 25/06/2013 31/03/2014 20/01/2014 15/07/2014 SU10-2 31/03/2013 25/06/2013 31/03/2014 02/04/2014 21/01/2014 SU11 31/03/2013 25/06/2013 31/03/2014 22/01/2014
Key
Completed on time and accepted Completed late Surveyed but not submitted / Accepted Will not be surveyed
For the most recent survey schedules for each survey unit please see http://www.channelcoast.org/southwest/survey_programme_schedule/ Annex F Lizard Point to Land’s End 2014
Annex F – Topographic Survey Report for Lizard Point to Lands End
1. Introduction
Analysis has been conducted for those sites where a minimum of three surveys have been recorded. In general, changes are measured relative to the Mean Low Water Springs (MLWS) level.
A full time series of plotted beach profiles are shown superimposed and relative to a Master Profile for each profile location (on the accompanying CD). The Master Profile provides the basis for calculation of beach cross-section area changes. Where possible, identical depth boundaries have been used for all profiles within a survey unit. However, even where this has not been possible, direct comparisons can be made for the beach cross-sectional area at one profile over time, since the master profile is constant for each profile (Figure 1). In some instances, raising the lower depth of the Master Profile may reduce the overall cross-sectional area of the profile. This may cause small changes in the beach profile to have a large impact on the percentage change. This effect has been taken into account in the analysis of change to beach profiles. The trend in cross-sectional area (CSA) is presented as a graph for each profile (Figure 2).
Figure 1: Example Master Profile with CSA calculated from the surveyed GPS Profile Annex F Lizard Point to Land’s End 2014
Figure 2: Example of Beach Profile Trend Analysis 1. Beach Cross-Sectional Area (CSA) 2. Replenishment Activities 3. Mathematically Derived Trend line
Baseline Data
As part of the Monitoring Programme specification, each survey unit receives a full topographic baseline survey once every five years, with the exception of repeat baseline sites which receive an annual baseline. Baseline surveys include a full profile survey at 50m intervals and continuous spot height data collected at approximately 1m intervals across the whole beach to the level of MLWS. This continuous data also includes a feature code for each spot height data point recorded. Where possible the feature code data has been used to provide a sediment distribution map for each survey unit.
2. Condition of process sub-cell
The Beach Change Summary maps contain an at-a-glance condition of the whole of the Lizard Point to Land’s End, with the lines representing the average accretion, no change or erosion for each survey unit where there is topographic data.
3. Condition of individual survey units
Changes within each survey unit are summarised on six maps where applicable: Beach change map (Spring to Spring), beach change map (Baseline to Baseline), topographic difference model map (Phase one baseline to repeat baseline), topographic difference model map (Repeat Baseline to Repeat Baseline), mean high water line map and sediment Annex F Lizard Point to Land’s End 2014
distribution maps. Beach change maps show the location of the beach profile superimposed on an aerial photograph (note that the line may be extended for clarity). Where possible, the annual change in cross-sectional area has been calculated from spring 2013 to spring 2014 and from baseline 2007 to spring 2014.
6eSU3-2 Mullion
Spring 2013 to Spring 2014 Low level erosion has occurred along the profile within Mullion Cove over the past year.
Baseline 2007 to Spring 2014 There has been a 2.83m2 loss of material along the profile, equating to -2% loss of cross- sectional area.
6eSU3-4 Poldhu Cove
Spring 2013 to Spring 2014 Over the last year, all interim profiles have lost significant amounts of material. Profile 6e00248 has lost 33% of its cross-sectional area, although the overall profile length is shorter than the other two profiles.
Baseline 2007 to Spring 2014 Profile 6e00248 has gained 27% in cross-sectional area, again relating to the relative short length in comparison to profile 6e00251 and 6e00251A. Both 6e00251 and 6e00251A have lost material since 2007, losing 76m2 and 78m2 respectively.
6eSU3-6 Church Cove
The profile locations have been changed for phase two of the Programme, therefore LiDAR data from 2007 has been used for the long term comparison.
Spring 2013 to Spring 2014 Over the last year, both profiles have lost material. Profile 6e00265A has lost 60m2 of material.
Baseline 2007 to Spring 2014 The longer period shows both profiles gaining low levels of material.
6eSU4-3 Gunwalloe
Spring 2013 to Spring 2014 The three profiles toward the southern end of the survey unit have all lost material over the past year. The profile at the northern extent of the survey unit has increased by 44% in cross- sectional area; this large increase is partly due to the short length of the profile line, and only equates to an actual material gain of 34m2. Annex F Lizard Point to Land’s End 2014
Baseline 2007 to Spring 2014 The long term analysis shows the two profiles at the southern end of the survey unit gaining material or remaining stable. However, the central and northern profiles show medium to low level erosion.
6eSU4-4 Loe Bar
Spring 2013 to Spring 2014 The year on year analysis shows the majority of profiles losing material, although percentage changes are small. The only profile that has gained material is 6e00350 (to the south eastern extent of the survey unit) with a 2% increase in cross-sectional area. Profile 6e00361 has lost 14% of its cross-sectional area, which can be attributed to its short length.
Baseline 2007 to Spring 2014 The longer term comparison shows profiles in the northern and central section of the survey unit being dominated by erosion, however, the percentage change in cross-sectional area is small along all profiles. The two profiles in the southern section of the survey unit have experienced some accretion or have remained stable.
Topographic Difference Model Changes 2013 - 2014 The difference model shows alternating areas of erosion and accretion just below the crest of the bar, along the beach face. The vegetated dune bar between the beach and the Loe has remained stable, as has the majority of the steep beach face. Areas of accretion can be seen at the back of the beach, at the shore of the Loe, and in the centre of the vegetated dune.
Net Sediment Balance above MLWS from 2013 to 2014: -3,609m3
Net Sediment Change from 2007 to 2014: -0.4%
Topographic Difference Model Changes 2007 - 2014 The longer term analysis also shows alternating areas of erosion and accretion below the crest of the bar. The steep beach front displays very low level erosion across the whole extent. Large areas of low level accretion are seen at the back of the beach, at the shore of Loe, and in the central beach area within the vegetated dune bar.
Net Sediment Balance above MLWS from 2007 to 2014: +2,534m3
Net Sediment Change from 2007 to 2014: 0.3%
6eSU4-5 Porthleven Sands
Spring 2013 to Spring 2014 The central profile 6e00380 has experienced some erosion over the past year. The remaining two profiles have gained material, both increasing in cross-sectional area by 10%.
Baseline 2007 to Spring 2014 All three profiles show medium level accretion, increasing in cross-sectional area by between 10-18%. This equates to an actual gain of >15m2 of material along each profile. Annex F Lizard Point to Land’s End 2014
6eSU4-6 Porthleven
Spring 2013 to Spring 2014 Over the last year profile 6e00388, positioned at the eastern extent of the survey unit, has experienced an 85% gain in cross-sectional area, equating to an actual gain of 36m2 of material. The central profile 6e00391 has experienced a decrease of 12% in cross-sectional area. The remaining profile has experienced no change over the past year.
Baseline 2007 to Spring 2014 The longer term analysis shows profile 6e00388 gaining 46% in cross-sectional area and the remaining profiles showing low levels of accretion since 2007.
6eSU6-2 Praa Sands
Spring 2013 to Spring 2014 Over the past year all the profiles in this survey unit have lost material, with the exception of the most westerly profile 6e00538, which has increased in cross-sectional area by 15%. All the profiles displaying erosion have lost more than 20% of their cross-sectional area. Profile 6e00534 has experienced the greatest loss in material, losing 199m2, equating to a 51% decrease in cross-sectional area.
Baseline 2007 to Spring 2014 Long term analysis shows erosion along every profile in the survey unit since 2007. Profiles to the east of the survey unit display the greatest change in actual material loss, with profile 6e00524 losing 143m2.
Topographic Difference Model Changes 2013 - 2014 The entire survey unit is dominated by large areas of erosion. The central and western area displays medium level erosion in comparison to the low level seen at the eastern extent of the survey unit. Some small areas of accretion can be seen around the rocks in the far eastern end of the unit. Another area of accretion can also be seen towards the central area of the beach, just above the mean high water level.
Net Sediment Balance above MLWS from 2013 to 2014: -131,779m3
Net Sediment Change from 2013 to 2014: -24%
Topographic Difference Model Changes 2013 - 2014 The long term analysis also shows overall erosion, with low level erosion in the east and medium level in the western area of the survey unit. Areas of accretion can be seen in the eastern extent of the survey unit around the rocks, but also below mean high water toward the central section of the beach. A band of accretion can also be seen at the back beach area in front of the sea defence and the grass cliff towards the western end of the unit.
Net Sediment Balance above MLWS from 2007 to 2014: -67,244m3
Net Sediment Change from 2007 to 2014: -13.9% Annex F Lizard Point to Land’s End 2014
6eSU8-2 Perran Sands
Spring 2013 to Spring 2014 Both profiles have lost material over the past year. Profile 6e00645 has seen a 49% decrease in cross-sectional area, with a loss of 181m2, whilst profile 6e00648 has lost 39%, equating to a loss of almost 126m2.
Baseline 2007 to Spring 2014 The long term analysis shows both profiles losing material. Profile 6e00645 has lost 68m2 of material, a change of -26% in cross-sectional area. Similarly, profile 6e00648 has lost 21% in cross-sectional area, equating to a loss of 52m2.
6eSU9-2 Little London
Spring 2013 to Spring 2014 Profiles 6e00693 and 6e00698 on Little London beach have shown some erosion over the past year, losing 9% and 8% of their cross-sectional area respectively. Accretion has been observed along profile 6e00708 parallel to the causeway, with a 5% gain in cross-sectional area.
Baseline 2007 to Spring 2014 Since the original baseline survey, all three profiles have lost material. Profile 6e00698 situated in the middle of Little London beach has experienced the greatest change, decreasing in cross-sectional area by 16% and losing almost 49m2 of material.
6eSU10-1 Marazion
Spring 2013 to Spring 2014 Three of the four profiles have experienced erosion over the past year, with the amount of material lost increasing to the west. Profile 6e00734, to the east, has gained material and seen a 7% increase in cross-sectional area.
Baseline 2007 to Spring 2014 The long term comparison shows that profile 6e00747 has lost material since 2007. Low level erosion is seen along profile 6e00739 towards the centre of the survey unit. The remaining profiles have both gained material since 2007, although percentage change in cross-sectional area is below 10% across the whole beach.
6eSU10-2 Mounts Bay
Spring 2013 to Spring 2014 Since spring 2013 the majority of profiles have experienced erosion. Some accretion is seen at either end of the survey unit, although the large percentage change seen along profile 6e00822 can be attributed to its short profile length. The greatest change is recorded towards the western end of the survey unit, with profiles 6e00806, 6e00802 and 6e00797 each losing up to 78m2 of material.
Baseline 2007 to Spring 2014 Over the longer time period, the majority of profiles along the central section of the survey unit have experienced a loss of material. Accretion is present along the two most easterly Annex F Lizard Point to Land’s End 2014
profiles. To the west accretion and stability is seen along the profiles. Similarly to the year on year analysis, profiles 6e00806, 6e00802 and 6e00797 have lost the most material.
6eSU11 Newlyn
Spring 2013 to Spring 2014 The year on year analysis shows four of the six profiles have been relatively stable over the past year, with changes in cross-sectional area below 8%. The two remaining profiles, 6e00861 and 6e00852, have experienced a loss of material, with changes in cross-sectional area of -22% and -25% respectively.
Baseline 2007 to Spring 2014 Since the original baseline survey, profile 6e00868 has experienced some low level accretion. Profile 6e00861 has experienced some low level erosion, losing 7% of its cross-sectional area, a loss of 7m2 in material. The remaining profiles have all lost very small amounts of material and have been classed as remaining stable since 2007. Explanatory Notes Lizard Point to Land’s End 2014
EXPLANATORY NOTES
Change in Cross-sectional Area (CSA)
The annual change in cross-sectional area is calculated as the difference in CSA between two surveys, expressed as a percentage change compared to the earlier CSA.
CSA െ CSA ଵ ଶ × 100 eqn(1) CSAଶ
Where CSA1 = most recent springtime survey and CSA2 = spring survey previous year. Therefore an annual change of –14% represents erosion during the last year of 14% of the area of last year’s survey.
Net Sediment Calculation
The value derived from this calculation represents the volume change in m3 across each individual survey unit over time. The initial volumes are derived from the Digital Terrain Models made for consecutive baseline topographic surveys. Both models are clipped to cover the same area, and a volume above the MLWS plane is calculated for each DTM. The net sediment change is calculated as
Volଵ – Volଶ eqn(2)
Where Vol1 = most recent DTM model volume and Vol2 = earlier DTM model volume. Therefore a net change of –19730m3 represents erosion since the earlier survey. South West Regional Coastal Monitoring Programme Annual Survey Report 2014
Actual Change in Cross-Sectional Area
6eSU10-2 km 6eSU10-1 02.55 ± 6eSU11 6eSU9-2 6eSU8-2 6eSU6-2
6eSU4-6 6eSU4-5 6eSU4-4 6eSU4-3
6eSU3-6 6eSU3-4
6eSU3-2
Actual Change in Cross-sectional
Area (Baseline(Spring 2013 2007 to to Spring Spring 2014) 2009) SU boundary° > 30 m 2 15 - 30 m2 2
Accretion 5 - 15 m 7d01323 (3) 2 No Change Less than 5 m 5 - 15 m 2 2 ° 15 - 30 m Actual Annual Change in 2 Cross-sectional Area (m 2 )
Erosion > 30 m
Beach Change Summary - Spring 2013 to Spring 2014 CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
% Change in Cross-Sectional Area
6eSU10-2 km 6eSU10-1 02.55 ± 6eSU11 6eSU9-2 6eSU8-2 6eSU6-2
6eSU4-6 6eSU4-5 6eSU4-4 6eSU4-3
6eSU3-6 6eSU3-4
6eSU3-2
Annual % Change in Cross-sectional
Area (Spring 2013 to Spring 2014) SU boundary° > 30 % 15 - 30 %
Accretion 5 - 15 % 7d01323 (3) No Change Less than 5 % 5 - 15 % ° 15 - 30 % Actual Annual Change in 2
Erosion > 30 % Cross-sectional Area (m )
Beach Change Summary - Spring 2013 to Spring 2014 CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
Actual Change in Cross-Sectional Area
6eSU10-2 km 6eSU10-1 02.55 ± 6eSU11 6eSU9-2 6eSU8-2 6eSU6-2
6eSU4-6 6eSU4-5 6eSU4-4 6eSU4-3
6eSU3-6 6eSU3-4
6eSU3-2
Actual ChangeChange in in Cross-sectional Cross-sectional
Area (Baseline(Baseline 2007 2007 to to Spring Spring 2009) 2014) SU boundary° > 30 m 2 15 - 30 m2 2
Accretion 5 - 15 m 7d01323 (3) 2 No Change Less than 5 m 5 - 15 m 2 2 ° 15 - 30 m Actual Annual Change in 2 2
Erosion > 30 m Cross-sectional Area (m )
Beach Change Summary - Baseline 2007 to Spring 2014 CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
% Change in Cross-Sectional Area
6eSU10-2 km 6eSU10-1 02.55 ± 6eSU11 6eSU9-2 6eSU8-2 6eSU6-2
6eSU4-6 6eSU4-5 6eSU4-4 6eSU4-3
6eSU3-6 6eSU3-4
6eSU3-2
Annual % Change in Cross-sectional
Area (Baseline 2007 to Spring 2014) SU boundary° > 30 % 15 - 30 %
Accretion 5 - 15 % 7d01323 (3) No Change Less than 5 % 5 - 15 % ° 15 - 30 % Actual Annual Change in 2
Erosion > 30 % Cross-sectional Area (m )
Beach Change Summary - Baseline 2007 to Spring 2014 CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
Actual Change in Cross-sectional
Area (Spring 2013 to Spring 2014) SU boundary° > 30 m 2 E 15 - 30 m2 2
Accretion 5 - 15 m Aerial Photography from 2012 7d01323 (3 %) 2 No Change Less than 5 m 5 - 15 m 2 m 02550± 2 ° 15 - 30 m Annual Change in 2 Cross-sectional Area (%) Erosion > 30 m
(-5%) 6e00202
6eSU3-2 - Mullion - Beach Change CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
Actual Change in Cross-sectional
Area (Baseline 2007 to Spring 2014) SU boundary° > 30 m 2 E 15 - 30 m2 2
Accretion 5 - 15 m Aerial Photography from 2012 7d01323 (3 %) 2 No Change Less than 5 m 5 - 15 m 2 m 02550± 2 ° 15 - 30 m Annual Change in 2 Cross-sectional Area (%) Erosion > 30 m
(-2%) 6e00202
6eSU3-2 - Mullion - Beach Change CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
Contours MHW Elevation: 1.85 OD E MLW Elevation:-1.65 OD
MHW 2014 - 05 Aerial Photography from 2012
MHW 2012 - 09 m 02550 MHW 2010 - 10 ± MHW 2007 - 09 MLW 2014 - 05
6eSU3-2 - Mullion - MHW and MLW Contours CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
Actual Change in Cross-sectional
Area (Spring 2013 to Spring 2014) SU boundary° > 30 m 2 15 - 30 m2 2
Accretion 5 - 15 m 7d01323 (3 %) 2 No Change Less than 5 m 5 - 15 m 2 2 ° 15 - 30 m Annual Change in 2 Cross-sectional Area (%) Erosion > 30 m
6e00251A (-24%)
6e00251 (-18%)
6e00248 (-33%)
Aerial Photography from 2012 ± E m 0 50 100
6eSU3-4 - Poldhu Cove - Beach Change CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
Actual Change in Cross-sectional
Area (Baseline 2007 to Spring 2014) SU boundary° > 30 m 2 15 - 30 m 2 2
Accretion 5 - 15 m 7d01323 (3 %) 2 No Change Less than 5 m 5 - 15 m 2 2 ° 15 - 30 m Annual Change in 2 Cross-sectional Area (%) Erosion > 30 m
6e00251A (-11%)
6e00251 (-9%)
6e00248 (27%)
Aerial Photography from 2012 ± E m 050100
6eSU3-4 - Poldhu Cove - Beach Change CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
E
Aerial Photography from 2012
m 0 50 100 ±
Contours
MHW Elevation: 1.85 OD MLW Elevation:-1.65 OD
MHW 2014 - 05
MHW 2012 - 09
MHW 2010 - 10
MHW 2007 - 09
MLW 2014 - 05
6eSU3-4 - Poldhu Cove - MHW and MLW Contours CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
Actual Change in Cross-sectional
Area (Spring 2013 to Spring 2014) SU boundary° > 30 m 2 E 15 - 30 m2 2
Accretion 5 - 15 m Aerial Photography from 2012 7d01323 (3 %) 2 No Change Less than 5 m 5 - 15 m 2 m 0 50 100 ± 2 ° 15 - 30 m Annual Change in 2 Cross-sectional Area (%) Erosion > 30 m
6e00263A (-3%)
6e00265A (-8%)
6eSU3-6 - Church Cove - Beach Change CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
Actual Change in Cross-sectional
Area (Baseline 2007 to Spring 2014) SU boundary° > 30 m 2 E 15 - 30 m2 2
Accretion 5 - 15 m Aerial Photography from 2012 7d01323 (3 %) 2 No Change Less than 5 m 5 - 15 m 2 m 0 50 100 ± 2 ° 15 - 30 m Annual Change in 2 Cross-sectional Area (%) Erosion > 30 m
6e00263A (2%)
6e00265A (1%)
6eSU3-6 - Church Cove - Beach Change CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
Contours
MHW Elevation: 1.85 OD E MLW Elevation: -1.65 OD
Aerial Photography from 2012 MHW 2014 - 05
MHW 2012 - 09 m MHW 2010 - 10 0 50 100 ± MHW 2007 - 09 MLW 2014 - 05
6eSU3-6 - Church Cove - MHW and MLW Contours CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
E
Aerial Photography from 2012 m 0 150 300 ±
6e00341 (44%)
6e00329 (-13%)
Actual Change in Cross-sectional
Area (Spring 2013 to Spring 2014) SU boundary° > 30 m 2 15 - 30 m2 2
Accretion 5 - 15 m 6e00319 (-4%) 7d01323 (3 %) 2 No Change Less than 5 m 5 - 15 m 2 2 ° 6e00315 (-6%) 15 - 30 m Annual Change in 2
Erosion > 30 m Cross-sectional Area (%)
6eSU4-3 - Gunwalloe - Beach Change CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
E
Aerial Photography from 2012 m 0 150 300 ±
6e00341 (-6%)
6e00329 (-9%)
Actual Change in Cross-sectional
Area (Baseline 2007 to Spring 2014) SU boundary° > 30 m 2 15 - 30 m2 2
Accretion 5 - 15 m 6e00319 (2%) 7d01323 (3 %) 2 No Change Less than 5 m 5 - 15 m 2 2 ° 6e00315 (0%) 15 - 30 m Annual Change in 2
Erosion > 30 m Cross-sectional Area (%)
6eSU4-3 - Gunwalloe - Beach Change CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
Contours
MHW Elevation: 1.91 OD MLW Elevation: -1.59 OD
MHW 2014 - 05 MHW 2010 - 10 MHW 2008 - 12 MHW 2007 - 04 HLW 2014 - 05
±
E Aerial Photography from 2012 m 0 150 300
6eSU4-3 - Gunwalloe - MHW and MLW Contours CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
E
Aerial Photography from 2012
m 0100200±
6e00361 (-14%)
6e00358 (-1%)
6e00356 (-3%)
6e00354 (-3%)
Actual Change in Cross-sectional
Area (Spring 2013 to Spring 2014) SU 6e00352 (-2%) boundary° > 30 m 2 15 - 30 m 2 2
Accretion 5 - 15 m 7d01323 (3 %) 2 No Change Less than 5 m 6e00350 (2%) 5 - 15 m 2 2 ° 15 - 30 m Annual Change in 2
Erosion > 30 m Cross-sectional Area (%)
6eSU4-4 - Loe Bar - Beach Change CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
E
Aerial Photography from 2012
m 0100200±
6e00361 (-12%)
6e00358 (-3%)
6e00356 (-2%)
6e00354 (-1%)
Actual Change in Cross-sectional
Area (Baseline 2007 to Spring 2014) SU 6e00352 (0%) boundary° > 30 m 2 15 - 30 m 2 2
Accretion 5 - 15 m 7d01323 (3 %) 2 No Change Less than 5 m 6e00350 (5%) 5 - 15 m 2 2 ° 15 - 30 m Annual Change in 2
Erosion > 30 m Cross-sectional Area (%)
6eSU4-4 - Loe Bar - Beach Change CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
E
Aerial Photography from 2012 m 0100200±
6e00361
6e00358
6e00356
6e00354
6e00352 Change in Elevation (m) between August 2013 and July 2014
6e00350 >= 3 2.5 - 2 3 - 2.51.5 - 1 2 - 1.50.5 - 0.25 1 -0.25- 0.5 -0.5 - 0.25 --1 -0.25 - -0.5-1.5 --2 -1 - -1.5-2.5 --3 -2 - -2.5<= -3
ACCRETION NO CHANGE EROSION
Model Extent
6eSU4-4 - Loe Bar - Topographic Difference Model CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
E
Aerial Photography from 2012 m 0 100 200 ±
6e00361
6e00358
6e00356
6e00354
6e00352 Change in Elevation (m) between April 2007 and July 2014
6e00350 >= 3 2.5 - 2 3 - 2.51.5 - 1 2 - 1.50.5 - 0.25 1 -0.25- 0.5 -0.5 - 0.25 --1 -0.25 - -0.5-1.5 --2 -1 - -1.5-2.5 --3 -2 - -2.5<= -3
ACCRETION NO CHANGE EROSION
Model Extent
6eSU4-4 - Loe Bar - Topographic Difference Model CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
Contours
MHW Elevation: 1.91 OD MLW Elevation: -1.59 OD
MHW 2014 - 05 MHW 2010 - 10 MHW 2008 - 12 MHW 2007 - 04 MLW 2014 - 05
Aerial Photography from 2012 m 0 100 200 E ±
6eSU4-4 - Loe Bar - MHW and MLW Contours CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
E
Aerial Photography from 2012 m 0100200±
Sediment Type
Gravel Gravel & Sand Sand Boulder Dune Dune Vegetated Grass Gravel & Mud Mud Mud & Sand Rock Saltmarsh Sea Defence Shell Water Body Mixture Obstruction
6eSU4-4 - Loe Bar - Sediment Distribution Map CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
E
Aerial Photography from 2012
m 6e00385 (10%) 0100200±
6e00380 (-4%)
6e00378 (10%)
Actual Change in Cross-sectional
Area (Spring 2013 to Spring 2014) SU boundary° > 30 m 2 15 - 30 m2 2
Accretion 5 - 15 m 7d01323 (3 %) 2 No Change Less than 5 m 5 - 15 m 2 2 ° 15 - 30 m Annual Change in 2 Cross-sectional Area (%) Erosion > 30 m
6eSU4-5 - Porthleven Sands - Beach Change CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
E
Aerial Photography from 2012
m 6e00385 (18%) 0100200±
6e00380 (14%)
6e00378 (10%)
Actual Change in Cross-sectional
Area (Baseline 2007 to Spring 2014) SU boundary° > 30 m 2 15 - 30 m2 2
Accretion 5 - 15 m 7d01323 (3 %) 2 No Change Less than 5 m 5 - 15 m 2 2 ° 15 - 30 m Annual Change in 2 Cross-sectional Area (%) Erosion > 30 m
6eSU4-5 - Porthleven Sands - Beach Change CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
Contours E MHW Elevation: 1.91 OD MLW Elevation: -1.59 OD
MHW 2014 - 05 Aerial Photography from 2012 MHW 2010 - 10 m MHW 2008 - 12 0 100 200 ± MHW 2007 - 04 MLW 2014 - 05
6eSU4-5 - Porthleven Sands - MHW and MLW Contours CISCAG- Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
E
Aerial Photography from 2012
m 0 50 100 ±
94 (0%)
6e003
6e00391 (-12%)
Actual Change in Cross-sectional
Area (Spring 2013 to Spring 2014) SU boundary° > 30 m 2 6e00388 (85%) 15 - 30 m2 2
Accretion 5 - 15 m 7d01323 (3 %) 2 No Change Less than 5 m 5 - 15 m 2 2 ° 15 - 30 m Annual Change in 2
Erosion > 30 m Cross-sectional Area (%)
6eSU4-6 - Porthleven - Beach Change CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
E
Aerial Photography from 2012
m 0 50 100 ±
94 (4%)
6e003
6e00391 (9%)
Actual Change in Cross-sectional
Area (Baseline 2007 to Spring 2014) SU boundary° > 30 m 2 6e00388 (46%) 15 - 30 m2 2
Accretion 5 - 15 m 7d01323 (3 %) 2 No Change Less than 5 m 5 - 15 m 2 2 ° 15 - 30 m Annual Change in 2
Erosion > 30 m Cross-sectional Area (%)
6eSU4-6 - Porthleven - Beach Change CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
Contours
MHW Elevation: 1.91 OD MLW Elevation: -1.59 OD
MHW 2014 - 05 MHW 2010 - 10 MHW 2008 - 12 MHW 2007 - 04 MLW 2014 - 05
E Aerial Photography from 2012 m 050100 ±
6eSU4-6 - Porthleven - MHW and MLW Contours CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
6e00536 (-40%) E
6e00538 (15%)
Aerial Photography from 2012
6e00534 (-51%) m 6e00532 (-47%) 0 100 200 ± 6e00530 (-28%)
6e00527 (-24%)
6e00524 (-40%)
6e00521 (-29%)
6e00517 (-27%)
6e00514 (-24%)
Actual Change in Cross-sectional
Area (Spring 2013 to Spring 2014) SU 6e00511 (-24%) boundary° > 30 m 2 15 - 30 m2 2
Accretion 5 - 15 m 7d01323 (3 %) 2 No Change Less than 5 m 5 - 15 m 2 2 ° 15 - 30 m Annual Change in 2
Erosion > 30 m Cross-sectional Area (%)
6eSU6-2 - Praa Sands - Beach Change CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
6e00536 (-23%) E
6e0053
8 (-5%) Aerial Photography from 2012
6e00534 (-30%) m 6e00532 (-26%) 0 100 200 ± 6e00530 (-15%)
6e00527 (-16%)
6e00524 (-39%)
6e00521 (-26%)
6e00517 (-30%)
6e00514 (-29%)
Actual Change in Cross-sectional
Area (Baseline 2007 to Spring 2014) SU 6e00511 (-32%) boundary° > 30 m 2 15 - 30 m2 2
Accretion 5 - 15 m 7d01323 (3 %) 2 No Change Less than 5 m 5 - 15 m 2 2 ° 15 - 30 m Annual Change in 2
Erosion > 30 m Cross-sectional Area (%)
6eSU6-2 - Praa Sands - Beach Change CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
E
6e00536
6e00538
6e00534 Aerial Photography from 2012
6e00532
6e00530 m 0 100 200 ±
6e00527
6e00524
6e00521
6e00517
6e00514
6e00511
Change in Elevation (m) between September 2013 and August 2014
>= 3 2.5 - 2 3 - 2.51.5 - 1 2 - 1.50.5 - 0.25 1 -0.25- 0.5 -0.5 - 0.25 --1 -0.25 - -0.5-1.5 --2 -1 - -1.5-2.5 --3 -2 - -2.5<= -3
ACCRETION NO CHANGE EROSION
Model Extent
6eSU6-2 - Praa Sands - Topographic Difference Model CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
E
6e00536
6e00538
6e00534 Aerial Photography from 2012
6e00532
6e00530 m 0 100 200 ±
6e00527
6e00524
6e00521
6e00517
6e00514
6e00511
Change in Elevation (m) between November 2007 and August 2014
>= 3 2.5 - 2 3 - 2.51.5 - 1 2 - 1.50.5 - 0.25 1 -0.25- 0.5 -0.5 - 0.25 --1 -0.25 - -0.5-1.5 --2 -1 - -1.5-2.5 --3 -2 - -2.5<= -3
ACCRETION NO CHANGE EROSION
Model Extent
6eSU6-2 - Praa Sands - Topographic Difference Model CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
E
Aerial Photography from 2012
m 0 100 200 ±
Contours
MHW Elevation: 1.91 OD MLW Elevation: -1.59 OD
MHW 2014 - 05 MHW 2012 - 08 MHW 2010 - 10 MHW 2009 - 09 MHW 2008 - 12 MHW 2007 - 09 MHW 2007 - 04 MLW 2014 - 05
6eSU6-2 - Praa Sands - MHW and MLW Contours CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
E
Aerial Photography from 2012 m 0 100 200 ±
Sediment Type
Gravel Gravel & Sand Sand Boulder Dune Dune Vegetated Grass Gravel & Mud Mud Mud & Sand Rock Saltmarsh Sea Defence Shell Water Body Mixture Obstruction
6eSU6-2 - Praa Sands - Sediment Distribution CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
E
Aerial Photography from 2012
m 0 50 100 ±
6e00648 (-39%)
6e00645 (-49%)
Actual Change in Cross-sectional
Area (Spring 2013 to Spring 2014) SU boundary° > 30 m 2 15 - 30 m2 2
Accretion 5 - 15 m 7d01323 (3 %) 2 No Change Less than 5 m 5 - 15 m 2 2 ° 15 - 30 m Annual Change in 2 Cross-sectional Area (%) Erosion > 30 m
6eSU8-2 - Perran Sands - Beach Change CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
E
Aerial Photography from 2012
m 0 50 100 ±
6e00648 (-21%)
6e00645 (-26%)
Actual Change in Cross-sectional
Area (Baseline 2007 to Spring 2014) SU boundary° > 30 m 2 15 - 30 m2 2
Accretion 5 - 15 m 7d01323 (3 %) 2 No Change Less than 5 m 5 - 15 m 2 2 ° 15 - 30 m Annual Change in 2 Cross-sectional Area (%) Erosion > 30 m
6eSU8-2 - Perran Sands - Beach Change CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
E
Aerial Photography from 2012 m 050100±
Contours
MHW Elevation: 1.95 OD MLW Elevation: -1.65 OD
MHW 2014 - 05 MHW 2012 - 06 MHW 2011 - 01 MHW 2008 - 12 MHW 2007 - 04 MLW 2014 - 05
6eSU8-2 - Perran Sands - MHW and MLW Contours CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
Actual Change in Cross-sectional m
Area (Spring 2013 to Spring 2014) E SU 0 100 200 2 boundary° > 30 m Aerial Photography from 2012 15 - 30 m2 2
Accretion 5 - 15 m 7d01323 (3 %) 2 No Change Less than 5 m ± 5 - 15 m 2 2 ° 15 - 30 m Annual Change in 2 Cross-sectional Area (%) Erosion > 30 m
6e00698 (-8%)
6e00693 (-9%)
6e00709 (5%)
6eSU9-2 - Little London - Beach Change CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
Actual Change in Cross-sectional m
Area (Baseline 2007 to Spring 2014) E SU 0 100 200 2 boundary° > 30 m Aerial Photography from 2012 15 - 30 m2 2
Accretion 5 - 15 m 7d01323 (3 %) 2 No Change Less than 5 m ± 5 - 15 m 2 2 ° 15 - 30 m Annual Change in 2 Cross-sectional Area (%) Erosion > 30 m
6e00698 (-16%)
6e00693 (-7%)
6e00709 (-6%)
6eSU9-2 - Little London - Beach Change CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014 Contours ± E MHW Elevation: 1.91 OD MLW Elevation: -1.65 OD
MHW 2014 - 05 Aerial Photography from 2012 m MHW 2012 - 07 0 100 200 MHW 2011 - 01 MHW 2008 - 12 MHW 2007 - 04 MLW 2014 - 05
6eSU9-2 - Little London - MHW and MLW Contours CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014 ± E
Aerial Photography from 2012 m 0150300
6e00747 (-11%)
6e00743 (-3%)
6e00739 (-1%)
6e00734 (7%)
Actual Change in Cross-sectional
Area (Spring 2013 to Spring 2014) SU boundary° > 30 m 2 15 - 30 m2 2
Accretion 5 - 15 m 7d01323 (3 %) 2 No Change Less than 5 m 5 - 15 m 2 2 ° 15 - 30 m Annual Change in 2 Cross-sectional Area (%) Erosion > 30 m
6eSU10-1- Marazion - Beach Change CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014 ± E
Aerial Photography from 2012 m 0150300
6e00747 (-6%)
6e00743 (3%)
6e00739 (-3%)
6e00734 (9%)
Actual Change in Cross-sectional
Area (Baseline 2007 to Spring 2014) SU boundary° > 30 m 2 15 - 30 m2 2
Accretion 5 - 15 m 7d01323 (3 %) 2 No Change Less than 5 m 5 - 15 m 2 2 ° 15 - 30 m Annual Change in 2 Cross-sectional Area (%) Erosion > 30 m
6eSU10-1- Marazion - Beach Change CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
Contours E MHW Elevation: 1.91 OD ± MLW Elevation: -1.65 OD
MHW 2014 - 05 Aerial Photography from 2012 m MHW 2012 - 07 0150300 MHW 2011 - 01 MHW 2008 - 12 MHW 2007 - 04 MLW 2014 - 05
6eSU10-1- Marazion - MHW and MLW Contours CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
Aerial Photography from 2012
Actual Change in Cross-sectional m E
Area (Spring 2013 to Spring 2014) SU 0 250 500 boundary° > 30 m 2 ± 15 - 30 m2 2
Accretion 5 - 15 m 7d01323 (3 %) 2 No Change Less than 5 m 5 - 15 m 2 2 ° 15 - 30 m Annual Change in 2 Cross-sectional Area (%) Erosion > 30 m
6e00772 (2%)
6e00776 (-7%)
6e00788(-8%)
6e00792 (-1%)
6e00797 (-15%)
6e00802 (-15%)
6e00806 (-13%)
6e00810 (-11%)
6e00814 (-10%)
6e00768 (-3%)
6e00764 (-11%)
6e00784 (1%) 6e00784 6e00760 (-4%) 6e00818 (-6%) (-12%) 6e00780 6e00756 (8%)
6e00751 (1%)
6e00822 (22%)
6eSU10-2 - Mounts Bay - Beach Change CISCAG - Cormwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
Aerial Photography from 2012
Actual Change in Cross-sectional m E
Area (Baseline 2007 to Spring 2014) SU 0 250 500 boundary° > 30 m 2 ± 15 - 30 m2 2
Accretion 5 - 15 m 7d01323 (3 %) 2 No Change Less than 5 m 5 - 15 m 2 2 ° 15 - 30 m Annual Change in 2 Cross-sectional Area (%) Erosion > 30 m
6e00772 (-1%)
6
6e00780(-5%) 6e00788(-3%) e00776 (-9%)
6e00792 (-2%)
6e00797 (-9%)
6e00802 (-8%)
6e00806 (-9%)
6e00810 (5%)
6e00814 (1%)
6e00768 (-2%)
6e00764 (-1%)
6e00760 (0%) 6e00818 (-5%) (-3%) 6e00784
6e00756 (10%) 6e00751 (9%)
6e00822 (4%)
6eSU10-2 - Mounts Bay - Beach Change CISCAG - Cormwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
Aerial Photography from 2012 Contours m E ± 0 250 500 MHW Elevation: 1.95 OD MLW Elevation: -1.65 OD
MHW 2014 - 05 MHW 2012 -08 MHW 2011 - 01 MHW 2008 - 12 MHW 2007 - 09 MHW 2007 - 04 MLW 2014 - 05
6eSU10-2 - Mounts Bay - MHW and MLW Contours CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
Actual Change in Cross-sectional
Area (Spring 2013 to Spring 2014) SU E boundary° > 30 m 2 15 - 30 m2 2
Accretion 5 - 15 m Aerial Photography from 2012 7d01323 (3 %) 2 6e00852 (-2 No Change Less than 5 m m 5 - 15 m 2 0150300± 2 ° 15 - 30 m Annual Change in 2 Cross-sectional Area (%) 5%) Erosion > 30 m
6e00859 (3%)
6e00861 (-22%)
6e00865 (0%)
6e00868 (0%)
6e00874 (-7%)
6eSU11 - Newlyn - Beach Change CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
Actual Change in Cross-sectional
Area (Baseline 2007 to Spring 2014) SU E boundary° > 30 m 2 15 - 30 m2 2
Accretion 5 - 15 m Aerial Photography from 2012 7d01323 (3 %) 2 No Change Less than 5 m 6e00852 (-2%) m 5 - 15 m 2 0150300± 2 ° 15 - 30 m Annual Change in 2 Cross-sectional Area (%) Erosion > 30 m
6e00859 (-3%)
6e00861 (-7%)
6e00865 (-1%)
6e00868 (3%)
6e00874 (-6%)
6eSU11 - Newlyn - Beach Change CISCAG - Cornwall South West Regional Coastal Monitoring Programme Annual Survey Report 2014
Contours E MHW Elevation: 1.95 OD MLW Elevation: -1.65 OD
Aerial Photography from 2012 MHW 2014 - 05
MHW 2012 - 08 m 0150300 MHW 2011 - 03 ± MHW 2009 - 02 MHW 2007 - 04 MLW 2014 - 05
6eSU11 - Newlyn - MHW and MLW Contours CISCAG - Cornwall Profile Charts for Survey Unit 6eSU3-2 Profile Charts for Survey Unit 6eSU3-4 Profile Charts for Survey Unit 6eSU3-4 Profile Charts for Survey Unit 6eSU3-4 Profile Charts for Survey Unit 6eSU3-6 Profile Charts for Survey Unit 6eSU3-6 Profile Charts for Survey Unit 6eSU4-3 Profile Charts for Survey Unit 6eSU4-3 Profile Charts for Survey Unit 6eSU4-3 Profile Charts for Survey Unit 6eSU4-3 Profile Charts for Survey Unit 6eSU4-4 Profile Charts for Survey Unit 6eSU4-4 Profile Charts for Survey Unit 6eSU4-4 Profile Charts for Survey Unit 6eSU4-4 Profile Charts for Survey Unit 6eSU4-4 Profile Charts for Survey Unit 6eSU4-4 Profile Charts for Survey Unit 6eSU4-5 Profile Charts for Survey Unit 6eSU4-5 Profile Charts for Survey Unit 6eSU4-5 Profile Charts for Survey Unit 6eSU4-6 Profile Charts for Survey Unit 6eSU4-6 Profile Charts for Survey Unit 6eSU4-6 Profile Charts for Survey Unit 6eSU6-2 Profile Charts for Survey Unit 6eSU6-2 Profile Charts for Survey Unit 6eSU6-2 Profile Charts for Survey Unit 6eSU6-2 Profile Charts for Survey Unit 6eSU6-2 Profile Charts for Survey Unit 6eSU6-2 Profile Charts for Survey Unit 6eSU6-2 Profile Charts for Survey Unit 6eSU6-2 Profile Charts for Survey Unit 6eSU6-2 Profile Charts for Survey Unit 6eSU6-2 Profile Charts for Survey Unit 6eSU6-2 Profile Charts for Survey Unit 6eSU8-2 Profile Charts for Survey Unit 6eSU8-2 Profile Charts for Survey Unit 6eSU9-2 Profile Charts for Survey Unit 6eSU9-2 Profile Charts for Survey Unit 6eSU9-2 Profile Charts for Survey Unit 6eSU10-1 Profile Charts for Survey Unit 6eSU10-1 Profile Charts for Survey Unit 6eSU10-1 Profile Charts for Survey Unit 6eSU10-1 Profile Charts for Survey Unit 6eSU10-2 Profile Charts for Survey Unit 6eSU10-2 Profile Charts for Survey Unit 6eSU10-2 Profile Charts for Survey Unit 6eSU10-2 Profile Charts for Survey Unit 6eSU10-2 Profile Charts for Survey Unit 6eSU10-2 Profile Charts for Survey Unit 6eSU10-2 Profile Charts for Survey Unit 6eSU10-2 Profile Charts for Survey Unit 6eSU10-2 Profile Charts for Survey Unit 6eSU10-2 Profile Charts for Survey Unit 6eSU10-2 Profile Charts for Survey Unit 6eSU10-2 Profile Charts for Survey Unit 6eSU10-2 Profile Charts for Survey Unit 6eSU10-2 Profile Charts for Survey Unit 6eSU10-2 Profile Charts for Survey Unit 6eSU10-2 Profile Charts for Survey Unit 6eSU10-2 Profile Charts for Survey Unit 6eSU10-2 Profile Charts for Survey Unit 6eSU11 Profile Charts for Survey Unit 6eSU11 Profile Charts for Survey Unit 6eSU11 Profile Charts for Survey Unit 6eSU11 Profile Charts for Survey Unit 6eSU11 Profile Charts for Survey Unit 6eSU11 Survey Unit 6eSU3-2 Cross-Sectional Area Charts Survey Unit 6eSU3-4 Cross-Sectional Area Charts Survey Unit 6eSU3-4 Cross-Sectional Area Charts Survey Unit 6eSU3-4 Cross-Sectional Area Charts Survey Unit 6eSU3-6 Cross-Sectional Area Charts Survey Unit 6eSU3-6 Cross-Sectional Area Charts Survey Unit 6eSU4-3 Cross-Sectional Area Charts Survey Unit 6eSU4-3 Cross-Sectional Area Charts Survey Unit 6eSU4-3 Cross-Sectional Area Charts Survey Unit 6eSU4-3 Cross-Sectional Area Charts Survey Unit 6eSU4-4 Cross-Sectional Area Charts Survey Unit 6eSU4-4 Cross-Sectional Area Charts Survey Unit 6eSU4-4 Cross-Sectional Area Charts Survey Unit 6eSU4-4 Cross-Sectional Area Charts Survey Unit 6eSU4-4 Cross-Sectional Area Charts Survey Unit 6eSU4-4 Cross-Sectional Area Charts Survey Unit 6eSU4-5 Cross-Sectional Area Charts Survey Unit 6eSU4-5 Cross-Sectional Area Charts Survey Unit 6eSU4-5 Cross-Sectional Area Charts Survey Unit 6eSU4-6 Cross-Sectional Area Charts Survey Unit 6eSU4-6 Cross-Sectional Area Charts Survey Unit 6eSU4-6 Cross-Sectional Area Charts Survey Unit 6eSU6-2 Cross-Sectional Area Charts Survey Unit 6eSU6-2 Cross-Sectional Area Charts Survey Unit 6eSU6-2 Cross-Sectional Area Charts Survey Unit 6eSU6-2 Cross-Sectional Area Charts Survey Unit 6eSU6-2 Cross-Sectional Area Charts Survey Unit 6eSU6-2 Cross-Sectional Area Charts Survey Unit 6eSU6-2 Cross-Sectional Area Charts Survey Unit 6eSU6-2 Cross-Sectional Area Charts Survey Unit 6eSU6-2 Cross-Sectional Area Charts Survey Unit 6eSU6-2 Cross-Sectional Area Charts Survey Unit 6eSU6-2 Cross-Sectional Area Charts Survey Unit 6eSU8-2 Cross-Sectional Area Charts Survey Unit 6eSU8-2 Cross-Sectional Area Charts Survey Unit 6eSU9-2 Cross-Sectional Area Charts Survey Unit 6eSU9-2 Cross-Sectional Area Charts Survey Unit 6eSU9-2 Cross-Sectional Area Charts Survey Unit 6eSU10-1 Cross-Sectional Area Charts Survey Unit 6eSU10-1 Cross-Sectional Area Charts Survey Unit 6eSU10-1 Cross-Sectional Area Charts Survey Unit 6eSU10-1 Cross-Sectional Area Charts Survey Unit 6eSU10-2 Cross-Sectional Area Charts Survey Unit 6eSU10-2 Cross-Sectional Area Charts Survey Unit 6eSU10-2 Cross-Sectional Area Charts Survey Unit 6eSU10-2 Cross-Sectional Area Charts Survey Unit 6eSU10-2 Cross-Sectional Area Charts Survey Unit 6eSU10-2 Cross-Sectional Area Charts Survey Unit 6eSU10-2 Cross-Sectional Area Charts Survey Unit 6eSU10-2 Cross-Sectional Area Charts Survey Unit 6eSU10-2 Cross-Sectional Area Charts Survey Unit 6eSU10-2 Cross-Sectional Area Charts Survey Unit 6eSU10-2 Cross-Sectional Area Charts Survey Unit 6eSU10-2 Cross-Sectional Area Charts Survey Unit 6eSU10-2 Cross-Sectional Area Charts Survey Unit 6eSU10-2 Cross-Sectional Area Charts Survey Unit 6eSU10-2 Cross-Sectional Area Charts Survey Unit 6eSU10-2 Cross-Sectional Area Charts Survey Unit 6eSU10-2 Cross-Sectional Area Charts Survey Unit 6eSU10-2 Cross-Sectional Area Charts Survey Unit 6eSU11 Cross-Sectional Area Charts Survey Unit 6eSU11 Cross-Sectional Area Charts Survey Unit 6eSU11 Cross-Sectional Area Charts Survey Unit 6eSU11 Cross-Sectional Area Charts Survey Unit 6eSU11 Cross-Sectional Area Charts Survey Unit 6eSU11 Cross-Sectional Area Charts