Flood risk assessment

An updated Level 1 Strategic Flood Risk Assessment (SFRA) has been produced in accordance with the NPPF requirements.

The SFRA Level 1 assesses and maps all forms of flood risk from groundwater, surface water, impounded water bodies, sewers, river and tidal sources to use as an evidence base to locate future development primarily in low flood risk areas. The outputs from the SFRA will also help us to prepare sustainable policies for the long-term management of flood risk.

SFRA Level 1 2023 - pdf - 3.42 Mb

Flood risk maps

The online map provides up-to-date map layers of all types of water and flood risk sources in the district. If you would like to discuss anything regarding the Online Map, please contact localplans@fdean.gov.uk. 

Lydney Level 2 flood risk report

This study refines and builds upon the work undertaken in the Level 1 SFRA, which included an assessment of flood risk from all sources.

There are numerous potential development sites in south-east Lydney and the Plummer’s Brook, a tributary of the River Lyd, flows in close proximity to these sites. 

This study includes detailed modelling of the Plummer’s Brook to provide flood hazard information for a range of return periods. In addition, the study determines of the suitability of the potential development sites surrounding Lydney which may be developed in the future.

Strategic Flood Risk Assessment Plummers Brook Lydney - pdf - 1.06 Mb

Appendix A Sequential And Exception Tests - pdf - 65 Kb

Appendix C Environment Agency Letter - pdf - 23 Kb

Lydney flood risk maps

Outline Map View1 - pdf - 1.10 Mb

Outline Map View2 - pdf - 1.22 Mb

20 Year Flood Event View 1 - pdf - 1.22 Mb

20 Year Flood Event View 2 - pdf - 1.32 Mb

100 Year Flood Event View 1 - pdf - 1.22 Mb

100 Year Flood Event View 2 - pdf - 1.33 Mb

100Plus Year Flood Event View 1 - pdf - 1.22 Mb

100Plus Year Flood Event View 2 - pdf - 1.08 Mb

1000 Year Flood Event View 1 - pdf - 1.22 Mb

1000 Year Flood Event View 2 - pdf - 1.33 Mb

Cinderford Level 2 flood risk report

The study refines and builds upon the work undertaken in the Level 1 SFRA, which included an assessment of flood risk from all sources.

The need to undertake a Level 2 SFRA for Cinderford is driven by the need to refine the existing flood Zone information through Cinderford, so that informed decisions can be made on the location and nature of future development. 

This study provides robust Flood Zones, as well as flood hazard information, for a range of return periods, in order to inform application of the Sequential and Exception Tests. Relevant policies for the management of flood risk and appropriate development of flood risk areas in Cinderford are then put forward.

Cinderford flood risk assessment and maps

Strategic Flood Risk Assessment Cinderford Report - pdf - 6.48 Mb

Cinderford Level 2 Sfra Flood Extents Map Flood Zones 2 3A 3B - pdf - 1.45 Mb

Appendix A Sequential Exception Test - pdf - 76 Kb

Appendix B Hydrological Method - pdf - 67 Kb

Appendix C Cinderford Brook Maximum Stage Results - pdf - 92 Kb

Appendix D1 Sensitivity Analysis Results - pdf - 137 Kb

Appendix D2 Sensitivity Analysis Results - pdf - 56 Kb

Appendix D3 Sensitivity Analysis Results - pdf - 55 Kb

Appendix F Cinderford Proposed Development Sites - pdf - 20 Kb

Appendix G Environmental Agency Sign Off Letter - pdf - 34 Kb

Flood Zones - pdf - 4.33 Mb

Hazard Mapping - pdf - 4.64 Mb

Hazard Map 20 Year Flood Event Outline - pdf - 1.75 Mb

Hazard Map 100 Year Flood Event Outline - pdf - 1.76 Mb

Hazard Map 100 Year Plus Event Outline - pdf - 1.76 Mb

Hazard Map 1000 Year Flood Event Outline - pdf - 1.76 Mb

Rapid Response Catchments

Following the Boscastle flooding in 2004 the Environment Agency modelled similar rainfall from that day, across the whole country.  As a result a number of areas have been identified that are at risk of a similar event occurring.  Two of these areas are in the Forest of Dean District;

• Drybrook, Cinderford Brook and Ruspidge
• Lydney

The Lydney Rapid Response Plan can be downloaded from the Lydney Town Council website.

The Cinderford Rapid Response Plan is available to download.

 

REDACTED Cinderford Brook Rapid Response Plan - pdf - 1.36 Mb

Related Pages

• Parish flood defences
• Flooding
• Local Plan evidence base