FD1927 - Understanding the lowering of beaches in front of coastal defence structures, stage 2

Theme:Strategy and Policy Development
Project status:Completed
Start date:14/02/2005
End date:13/08/2006
Keywords:
  • Processes,
  • Coastal Defence,
  • Environmental Protection,
  • Flood and Coastal Defence,
  • Land
Contractor:
  • HR Wallingford Ltd
Contact:

PROJECT CLOSING STATEMENT


The report includes new information on the behaviour of beaches in front of coastal defence structures at a range of time and space scales. This will enable better informed decisions to be made about data collection, monitoring and intervention. Moreover, it will assist in the appropriate design, construction and maintenance of coastal defence assets. The report also provides cross-referencing to HR Wallingford Technical Notes

CBS0726/01

to

CBS0726/09,

which were prepared during the project and provide
additional details that can aid in understanding the summary information in

FD1927/TR.



SUMMARY OBJECTIVE


The purpose of this project is to rectify a number of identified shortcomings in our ability to predict and mitigate beach lowering at coastal defence structures. Toe scour has been blamed for the failure of many coastal structures in the UK3 and design practice has not changed substantially in the intervening period. Improving the predictive capability and understanding of toe scour can provide substantial benefits by extending the life and reducing the risk of sudden failure of defences. This will positively impact both the design of new structures and the maintenance and remediation of existing structures.

KEY

CUSTOMER PURPOSE


The benefits from the project will include an improved understanding of scour that can occur at coastal defence structures, and the attached uncertainty in predictions, written down in a Best Practice Guidance document. This document will be used by designers and owners (e.g. local councils) to inform their approach to the design and monitoring of beach levels in front of coastal defences.