PfSH Strategic Flood Risk Assessment (2024)

A Strategic Flood Risk Assessment (SFRA) is a study carried out to assess the risk to an area from all sources of flooding, now and in the future, taking into account the impacts of climate change. The information and mapping it provides is used to inform decisions on what level and type of development is appropriate in different parts of the borough in light of flood risk, and is a key piece of evidence for the Local Plan and a material consideration in planning decisions.

AECOM was commissioned on behalf of ten planning authorities in South Hampshire - the 'Partnership for South Hampshire' (PfSH) - to prepare an updated Strategic Flood Risk Assessment (SFRA) to replace the earlier 2016 SFRA.

The PfSH SHRA has been prepared in line with the requirements of the National Planning Policy Framework (NPPF), supporting Planning Practice Guidance (PPG) and Environment Agency guidance 'How to prepare a Strategic Flood Risk Assessment.'

The full outputs for all the PfSH Local Authorities are hosted on the PfSH website.

The outputs for Havant Borough are accessible below. The mapping is not currently available in interactive format.

Main Report

• SFRA Part 1 Main Report
• SFRA Part 1 Appendix A (River Floodplan Analysis)
• SFRA Part 1 Appendix B1 East Solent Technical Note

Havant Report

• SFRA Havant Report

Appendix A - mapping

• Figure 1 - Flood Zones 2 & 3 (present day)
• Figure 2 - Recorded Flood Outlines
• Figure 3 - Risk of Flooding from Surface Water (RoFSW)
• Figure 4 - Area Susceptible to Groundwater Flooding (EA)
• Figure 5 - Susceptibility to Groundwater Flooding (BGS)
• Figure 6 - Risk of Flooding from Reservoirs
• Figure 7 - Potential for Cumulative Impact of Development on Flood Risk
• Figure 8 - Opportunities to Reduce Causes and Impacts of Flooding
• Figure 9 - Flood Warning Areas
• Figure 10 - Flood Risk Management Policies
• Figure 11 - GIS Floodplain Analysis
• Figure 12 - Modelled Flood Extents incl Effects of Climate Change
• Figure 13 - Tidal Flood Extent, Defended 3.3% AEP

Appendix B - mapping

• Figure 1 - Coastal Erosion Risk
• Figure 2 - Future Coastal Flood Zones
• Figure 3 - Maximum Flood Depth (m): Defended 1 in 200 Year (0.5% AEP) 2022 (Higher Central)
• Figure 4 - Maximum Flood Depth (m): Defended 1 in 200 Year (0.5% AEP) 2055 (Higher Central)
• Figure 5 - Maximum Flood Depth (m): Defended 1 in 200 Year (0.5% AEP) 2122 (Higher Central) 
• Figure 6 - Maximum Flood Depth (m): Defended 1 in 200 Year (0.5% AEP) 2122 (Upper End)
• Figure 7 - Maximum Flood Depth (m): Defended 1 in 1000 Year (0.1% AEP) 2122 (Upper End)
• Figure 8 - Maximum Flood Depth (m): Undefended 1 in 200 Year (0.5% AEP 2122 (Upper End)
• Figure 9 - Maximum Flood Depth (m): Undefended 1 in 1000 Year (0.1% AEP) 2122 (Upper End)
• Figure 10 - Maximum Flood Hazard (m): Defended 1 in 200 Year (0.5% AEP) 2022 (Higher Central)
• Figure 11 - Maximum Flood Hazard (m): Defended 1 in 200 Year (0.5% AEP) 2055 (Higher Central)
• Figure 12 - Maximum Flood Hazard (m): Defended 1 in 200 Year (0.5% AEP) 2122 (Higher Central)
• Figure 13 - Maximum Flood Hazard (m): Defended 1 in 200 Year (0.5% AEP) 2122 (Upper End)
• Figure 14 - Maximum Flood Hazard (m): Undefended 1 in 1000 Year (0.1% AEP) 2122 (Upper End)
• Figure 15 - Maximum Flood Hazard (m): Undefended 1 in 200 Year (0.5% AEP) 2122 (Upper End)
• Figure 16 - Maximum Flood Hazard (m): Undefended 1 in 1000 Year (0.1% AEP) 2122 (Upper End)