Strategic Flood Risk Assessment

The Strategic Flood Risk Assessment (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.

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 South Hampshire sub-region. The Eastleigh SFRA (2023) provides more information on the sources and extent of flooding in the Borough.

Level 1 – Part 1

Level 1 SFRA - Part 1: Main report AECOM 2024

• Appendix A: River Floodplain Analysis, AECOM, 2023
• Appendix B1: East Solent Flood Inundation Model Re-simulation Technical Note, AECOM, 2024
• Appendix B2: Southampton Water Flood Inundation Model Re-simulation Technical Note, AECOM, 2023

Level 1 – Part 8 

Level 1 SFRA - Part 8: Eastleigh Borough Council, AECOM 2023

Appendix A Figures

• Figure 1 Flood Zones
• Figure 2 Recorded Flood Outlines
• Figure 3 Risk of Flooding from Surface Water
• Figure 4 Areas Susceptible to Groundwater Flooding
• Figure 5 BGS Susceptibility to Groundwater Flooding
• Figure 6 Risk of Flooding from Reservoirs
• Figure 7 Potential for Cumulative Impact of Development on Flood Risk
• Figure 8 Opportunities to Reduce the 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 including Effects of Climate Change
• Figure 13 Risk of Flooding from the Sea (3.3% AEP Flood Extent, including existing defences)

Appendix B Tidal Flood Risk Mapping

• Figure 1 Coastal Erosion Risk
• Figure 2 Future Coastal Flood Zones

Maximum Flood Depth Figures

Defended

• Figure 3 Maximum Flood Depth: Defended 1 in 200 Year (0.5% AEP) 2022
• Figure 4 Maximum Flood Depth: Defended 1 in 200 Year (0.5% AEP) 2055 (Higher Central)
• Figure 5 Maximum Flood Depth: Defended 1 in 200 Year (0.5% AEP) 2122 (Higher Central)
• Figure 6 Maximum Flood Depth: Defended 1 in 200 Year (0.5% AEP) 2122 (Upper End)
• Figure 7 Maximum Flood Depth: Defended 1 in 1000 Year (0.1% AEP) 2122 (Upper End)

Undefended

• Figure 8 Maximum Flood Depth: Undefended 1 in 200 Year (0.5% AEP) 2122 (Upper End)
• Figure 9 Maximum Flood Depth: Undefended 1 in 1000 Year (0.1% AEP) 2122 (Upper End)

Maximum Flood Hazard Figures

Defended

• Figure 10 Maximum Flood Hazard: Defended 1 in 200 Year (0.5% AEP) 2022
• Figure 11 Maximum Flood Hazard: Defended 1 in 200 Year (0.5% AEP) 2055 (Higher Central)
• Figure 12 Maximum Flood Hazard: Defended 1 in 200 Year (0.5% AEP) 2122 (Higher Central)
• Figure 13 Maximum Flood Hazard: Defended 1 in 200 Year (0.5% AEP) 2122 (Upper End)
• Figure 14 Maximum Flood Hazard: Defended 1 in 1000 Year (0.1% AEP) 2122 (Upper End)

Undefended

• Figure 15 Maximum Flood Hazard: Undefended 1 in 200 Year (0.5% AEP) 2122 (Upper End)
• Figure 16 Maximum Flood Hazard: Undefended 1 in 1000 Year (0.1% AEP) 2122 (Upper End)