Cuckmere

Modelling

East Sussex County Council commissioned Capita Symonds to prepare new modelling and analysis in order to help members of the community reach a decision about the best future management option for the Cuckmere.

This new modelling work uses a detailed hydraulic study of the Cuckmere, alongside a geomorphological and ecological review, to explore the likely short, medium and long term impacts of different flood risk management options. It provides an assessment of the likely changes to the estuary morphology, and the subsequent changes to flooding, vegetation, habitats and assets in the estuary, as well as a cost comparison of construction and maintenance of each option.  

Alongside the written report, the results from the modelling are presented as a series of maps which show the extent and depth of inundation within the estuary for a range of tide and river conditions for each of the possible management options, as well as the different vegetation and land cover that we believe is likely to develop over the same period, for the same management options.  

Main report

Please note that this is the final version of the Capita Symonds report and includes changes made in the light of feedback received from the community and the project team.

Download the main report - Capita Symonds Options Assessment Report
Download Appendix A - CS Impact Study Option Tables
Download Appendix B - CS Sediment Assessment
Download Appendix C1 - CS Short Term Depth Maps
Download Appendix C2 - CS Medium Term Depth Maps
Download Appendix C3 - CS Long Term Depth Maps
Download Appendix D1 - CS Short Term Habitat Maps
Download Appendix D2 - CS Medium Term  Habitat Maps
Download Appendix D3 - CS Long Term Habitat Maps
Download Appendix E - CS Coastal Processes Panel
Dowload Appendix F1 - CS Engineering Plans Options A and B
Download Appendix F2 - CS Engineering Plan Option C
Download Appendix F3 - CS Engineering Plans Options D_E_F
Download Appendix F4 - CS Engineering Drawings (all options)

Animations

The team has produced a series of  animated 'fly throughs' showing how the estuary might look in the short, medium and long term for each of the seven management options being considered by the community. These can be viewed on the project youtube site, on the following pages:

Short term scenarios

Baseline 'do nothing'
Option A, Partial breach of flood defences
Option B, Full breach of flood defences
Option C, Engineered reactivation of the meanders
Option D, Maintain existing defences
Option E, Sustain/improve existing defences - longer term
Option F, Sustain/improve existing defences - shorter term

Medium term scenarios 

Baseline 'do nothing'
Option A, Partial breach of flood defences
Option B, Full breach of flood defences
Option C, Engineered reactivation of the meanders
Option D, Maintain existing defences
Option E, Sustain/improve existing defences - longer term
Option F, Sustain/improve existing defences - shorter term

Long term scenarios

Baseline 'do nothing'
Option A, Partial breach of flood defences
Option B, Full breach of flood defences
Option C, Engineered reactivation of the meanders
Option D, Maintain existing defences
Option E, Sustain/improve existing defences - longer term
Option F, Sustain/improve existing defences - shorter term

Photos

New visual mock-ups in the form of photos have also been commissioned as part of the study to help stakeholders envisage how the estuary might look in the short, medium and long term for each of the management options.

Download images - Baseline 'do nothing'
Download images - Option A: Partial breach
Download images - Option B: Full breach
Download images - Option C: Engineered reactivation of meanders
Download images - Option D: Maintain defences
Download images - Option E: Sustain/improve defences - longer term
Download images - Option F: Sustain/improve defences - shorter term