Strategic Flood Risk Assessment

The Strategic Flood Risk Assessment (SFRA) helps us with decision making on planning applications and helps us on decisions on the location of future development and the preparation of sustainable policies for the long-term management of flood risk. The SFRA provides information about the risk of flooding for an area. It shows the risks from different sources including groundwater and surface water flooding. It also assesses the impact of development on the risk of flooding and the effects of climate change.

We have worked with neighbouring local authorities through the Partnership for South Hampshire (PfSH), on a joint evidence base to inform development requirements for the sub-region. The PfSH Level 1 SFRA 2024 update has delivered revised reporting, mapping and guidance notes . AECOM was commissioned by Portsmouth City Council on behalf of ten planning authorities PfSH to prepare an updated Strategic Flood Risk Assessment.

The SFRA is split into two reports and a series of maps. The main report includes an overview of the issues and sets out the approach to flooding across the District and the South Hampshire sub-region. This 2024 report supersedes the 2018 SFRA work and that report and its appendices are listed below for completeness.

Please note that the 2024 SFRA as a focused regional study supplements the national dataset 'flood map for planning', as used in this service: flood map for planning.

The national maps are updated periodically but they still may not incorporate all the data that the SFRA mapping has, for example surface water flood risk and flood risk from ordinary watercourses, which identify a development will be at increased risk of flooding during its lifetime.

Where the national flood map for planning shows there is no flood risk, please check with us whether the site may actually be at risk as identified in the 2024 SFRA.

The SFRA reports and mapping are available below:

• Main Report Part 1 (2024): SFRA Main Report Part 1 (PDF, 575 KB)

• Part 1 Appendices (Technical Notes):PfSH_SFRA_NFDC_Part_1_Appendices_Technical_Notes (PDF, 2 MB)

• Main Report: Part 10 - New Forest District area (2024):PfSH_SFRA_NFDC_Part_10_New_Forest_District_2024 (PDF, 703 KB)

• Part 10 Appendix A - Mapping (Whole District area 2024):PfSH_SFRA_NFDC_Part_10_Appendix_A_Mapping_Whole_District_area_2024 (PDF, 71 MB) 

• Part 10 Appendix B - Mapping (Milford area 2024):PfSH_SFRA_NFDC_Part_10_Appendix_B_Mapping_MIlford area_2024 (PDF, 20 MB)

• Part 10 Appendix B - Mapping (Southampton Waterside area 2024):PfSH_SFRA_NFDC_Part_10_Appendix_C_Mapping_Southampton_Waterside_ area_2024 (PDF, 33 MB)

• 2018 SFRA report (now superseded by the 2024 SFRA): Combined SFRA Level 1 and 2 (PDF, 14 MB)

• 2018 SFRA appendices (now superseded by the 2024 SFRA) : 2018 Strategic Flood Risk Assessment appendices

Note: the superseded 2018 SFRA flood maps are currently available on our online maps.

These should be updated after the 2024 SFRA spatial data is made available to NFDC.