1. Use of Monitoring Data for Beach Management
How Halcrow has been using SWRCMP data to inform beach management in the South-West
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2. Content Overview of what we use monitoring data for
The beach management planning process
Case studies:
Exe Estuary FCERM Strategy / Dawlish Warren & Exmouth Beach Recharge Technical Appraisal Study
Burnham on Sea, Berrow and Brean Beach, Dune and Coastal Defence Assets Management Plan
Chesil Beach (Portland to Small Mouth) Management Plan
Lyme Regis and West Beach, West Bay Beach Management Plans
Teign Estuary Coastal Management Study
SANDS news
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3. Overview of what we use monitoring data for
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4. What do we use monitoring data for?
Data from the monitoring programme is used to inform a wide range of studies, including:
Coastal Processes Studies
Shoreline Management Plans
Coastal Risk Management Strategies
Beach Management Plans and Operations
Scheme Design
Post-scheme appraisal
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5. Types of data we use Beach Profiles…. Waves and Tides…. Annual Reports
Assess beach movement trends, especially when combined with wave and tide data.
Use in calibrating/validating cross-shore models, especially post-storm surveys.
Use in calibrating/validating shoreline evolution models.
Waves and Tides….
Link to understanding beach profile responses.
Use in calibrating/validating numerical models.
Annual Reports
Provide a very useful summary of recent changes in a study area.
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6. Types of data we use Aerial Photos, LiDAR and Bathymetry….
Assessing coastal change of cliffs and inter-tidal areas.
Assessing shoreline evolution
Calibration/validation of shoreline evolution modelling.
Create difference models to assess changes.
Utilise to establish DTMs for numerical modelling.
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7. Example projects in the South-West
Guidance for Beach Modelling
Desk based review of beach performance post-construction for 10 locations around England and Wales, including Preston Beach (Weymouth).
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8. Example projects in the South-West
Guidance for Beach Modelling
Desk based review of beach performance post-construction for 10 locations around England and Wales, including Preston Beach (Weymouth).
West Dorset, Weymouth & Portland Coastal Risk Planning Guide
Using profile data make broad assessment of potential loss of dry-beach area as sea levels rise so planners are more aware of this issue.
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9. Example projects in the South-West
Guidance for Beach Modelling
Desk based review of beach performance post-construction for 10 locations around England and Wales, including Preston Beach (Weymouth).
West Dorset, Weymouth & Portland Coastal Risk Planning Guide
Using profile data make broad assessment of potential loss of dry-beach area as sea levels rise.
Jurassic Coast Pathfinder Project - 3D Visualisations
Used LiDAR and Aerial Photos to develop present day 3D visuals (stills and animations), then manipulated these to show year 50 and 100 coastal change scenarios.
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11. Example projects in the South-West
Guidance for Beach Modelling
Desk based review of beach performance post-construction for 10 locations around England and Wales, including Preston Beach (Weymouth).
West Dorset, Weymouth & Portland Coastal Risk Planning Guide
Using profile data make broad assessment of potential loss of dry-beach area as sea levels rise.
Jurassic Coast Pathfinder Project - 3D Visualisations
Used LiDAR and Aerial Photos to develop present day 3D visuals, then manipulated these to show year 50 and 100 coastal change scenarios.
Beach Management Plans for Preston Beach, Weymouth; East Beach and Freshwater Beach, West Bay/Burton Bradstock
06/07/2018

12. Example projects in the South-West
Guidance for Beach Modelling
Desk based review of beach performance post-construction for 10 locations around England and Wales, including Preston Beach (Weymouth).
West Dorset, Weymouth & Portland Coastal Risk Planning Guide
Using profile data make broad assessment of potential loss of dry-beach area as sea levels rise.
Jurassic Coast Pathfinder Project - 3D Visualisations
Used LiDAR and Aerial Photos to develop present day 3D visuals, then manipulated these to show year 50 and 100 coastal change scenarios.
Beach Management Plans for Preston Beach, Weymouth; East Beach and Freshwater Beach, West Bay/Burton Bradstock
South Devon & Dorset and North Devon & Somerset Shoreline Management Plans
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13. The beach management planning process
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14. Beach management planning
CIRIA Beach Management Manual, second edition published in 2010.
Includes wealth of guidance for all aspects of beach management to achieve multiple objectives.
Set within the context of the beach management cycle.
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15. Beach management planning
The BMM also Includes a ‘best practice’ template for beach management plans to be used to guide monitoring and maintenance operations.
Template developed through application on several BMPs including:
East Beach/Freshwater Beach (West Bay/Burton Bradstock)
Preston Beach (Weymouth)
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16. Beach management planning
Halcrow has developed a staged approach to preparing BMPs that align with the CIRIA BMM best practice guidance.
Monitoring data is typically:
Collated in Stage 2
Used to develop coastal process understanding in Stage 3
Used in Stages 4 and 5 to inform options for what additional monitoring is required in the future
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17. Case study 1
Exe Estuary FCERM Strategy / Dawlish Warren & Exmouth Beach Recharge Technical Appraisal Study
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18. About the projects
Dawlish Warren & Exmouth Beach Recharge Technical Appraisal Study
To appraise options for delivering beach recharge over the next 20 years to maintain Dawlish Warren and Exmouth Beach. Output will be two BMPs.
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19. About the projects Exe Estuary FCERM Strategy
To deliver a 100 year strategy for managing flood and coastal erosion risk and habitat within the Exe Estuary (Langstone Rock to Orcombe Point).
NOTE: strategy informs choice of preferred option for the short term in the recharge study (so as not to be detrimental to long term strategic option).
Recharge study analysis informs processes understanding and conceptual model for Exe Estuary.
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20. Analysis using SWRCMP data
Bathymetry and LiDAR used to establish DTM for HD and Wave Transformation models.
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21. Analysis using SWRCMP data
Wave data collected for study used to calibrate and validate wave transformation model. Data to be passed to PCO for future use.
Wave model used to derive nearshore wave climate to use in overtopping analysis and drive beach cross-shore and shoreline evolution models.
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22. Analysis using SWRCMP data
Beach profile data used to:
Assess recent trends in CSA/volumes
Storm profile response and recovery
Foreshore change parameter analysis
Informed conceptual understanding of complex sediment transport processes around the Exe Estuary mouth for strategy.
In turn guided approach to numerical modelling for recharge study.
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23. Analysis using SWRCMP data
Beach profile data also used to validate beach cross-shore model (COSMOS) and shoreline evolution model (COASTLINE)
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24. Case study 2
Burnham on Sea, Berrow and Brean Beach, Dune & Coastal Defence Assets Management Plan
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25. About the project
Located on the eastern side of Bridgwater Bay, Somerset, UK. Protects the large low-lying area of the Somerset Levels from coastal flood risk.
Area contains beaches backed by both hard defence structures and natural dune system.
Very complex coastal processes due to influence of Parrett and Severn Estuaries.
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26. About the project Wide variety of landowners and defences.
Private defences/properties built into sand dunes.
Different management approaches along frontage.
Local conservation group involvement in dune management to capture.
Defra Pathfinder project developed approaches to adapting to coastal change for this area.
BDMP has taken this forward with further community engagement.
Access through dunes by large numbers of tourists is problematic.
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27. Analysis using SWRCMP data
Utilised beach profiles, wave buoy data (Weston Bay/Minehead) and annual reports
Informed baseline coastal process understanding alongside other historical data.
SWRCMP schedule include in BMP monitoring section.
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28. Chesil Beach (Portland to Small Mouth) Management Plan
Case study 3
Chesil Beach (Portland to Small Mouth) Management Plan
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29. About the project
Development of a BMP for the south-east end of Chesil Beach, Dorset, UK
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30. About the project
Only focussed on management of the beach and it relationship with other defence assets.
Not to define management of other assets (e.g. seawall/gabion monitoring or maintenance).
Major issue over ability of available techniques to allow definition of robust trigger levels. Chesil Beach is a unique feature for which standard methods of analysis are not applicable.
Site is within UNSECO World Heritage Site (the ‘Jurassic Coast’), SAC, SPA, Ramsar and SSSI designations. Management must be sensitive to these features.
Primary flood risk is from ‘unpredictable’ swell wave events – we may know when they are coming from Met Office but do not understand the interaction with the beach system sufficiently to issue accurate flood warnings.
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31. Analysis using SWRCMP data
Beach profiles used to develop processes understanding, including:
Changes in beach crest height & width
Changes in CSA/volume
Storm profile response and recovery
Beach stability (Barrier Index)
Analysis updated in subsequent Chiswell Gabions study – data also used to validate SHINGLE model as part of that study.
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32. Analysis using SWRCMP data
Wave data – Chesil Wave Buoy – compared to previous wave climate assessment (e.g. Futurecoast)
SWRCMP schedule include in BMP monitoring section.
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33. Lyme Regis and West Beach, West Bay, Beach Management Plans
Case study 4
Lyme Regis and West Beach, West Bay, Beach Management Plans
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34. About the project
Review and update of BMPs at Lyme Regis and West Beach, West Bay, supported by options appraisal for future beach management
Lyme Regis recharged in 2007 to deliver separate sand and shingle beaches as part of LREI Phase 2.
West Beach recharged in 2005 with shingle as part of West Bay Coastal Defence and Harbour Improvement Scheme.
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35. Analysis using SWRCMP data
Annual reports provide summary of recent changes.
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36. Analysis using SWRCMP data
Annual reports provide summary of recent changes.
Beach profiles used to investigate:
Changes in CSA/volume since recharge and estimate when recharge next required.
Beach gradient changes (steepening/flattening etc.)
Storm profile response and recovery
Wave data – West Bay Wave Buoy –used to identify storm conditions related to post-storm surveys.
SWRCMP schedule include in BMP monitoring section.
06/07/2018

37. Teign Estuary Coastal Management Study
Case study 5
Teign Estuary Coastal Management Study
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38. About the project
Study to develop a BMP for Teignmouth and Shaldon Beaches.
Includes appraisal of options for recycling sediment from navigation channel to these beaches, supported by numerical modelling by ABPmer and understanding of the Teign Estuary system.
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39. Analysis using SWRCMP data
2007 and 1998 LiDAR data used to create difference plots within the estuary.
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40. Analysis using SWRCMP data
Beach profile data and annual reports reviewed to inform conceptual understanding of processes along the Teignmouth shoreline within context of wider Teign Estuary system.
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41. Analysis using SWRCMP data
Numerical modelling by ABPmer used:
2007 bathymetry data to update an existing 2002 model DTM.
Teignmouth Pier and Dawlish wave buoy data used to input to XBEACH 1D and 2D models.
Beach profiles used with XBEACH to model existing beach response to storm events.
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42. SANDS news
06/07/2018

43. SANDS news SANDS v7.0 released. New features include:
Cliff Profile Inspection
Cliff Profile Analysis Tool
Coastal Groynes Register
SANDS user group meeting being planned for December….details to be advised!
06/07/2018

44. Thank you!
06/07/2018