Policy information sourced from the Kingston Town Centre Area Action Plan Chapter 11
K24: FLOOD RISK MANAGEMENT
Flood risk assessment (FRA) will be required for major development proposals within Flood Zone 1 and all new development within Flood Zones 2 and 3 (3a and 3b). The FRA should be commensurate with the degree of fl ood risk posed to and by the proposed development and take account of the advice and recommendations set out in the Kingston town centre Strategic Flood Risk Assessment 2007 (SFRA), including measures to be adopted by new development to reduce fl ood risk and meet the requirements of PPS25 (Development and Flood Risk).
Within Flood Zone 3b, functional floodplain, only water compatible uses and essential infrastructure (PPS25 Table D3) will be permitted, unless the site specific recommendations in the SFRA state otherwise.
Within High Risk Zone 3a, development proposals should include the flood mitigation measures set out below as an integral part of the design process:
- Land use on the ground floor must be limited to non-residential uses
- Floor levels must be situated above the 1% predicted maximum flood level plus climate change, incorporating an allowance for freeboard. The SFRA, fi gure 4 and section 6.4.4 provide further guidance on raised floor levels and predicted flood depths
- Safe escape routes must be provided for evacuation in times of flood
- Access to basement areas must be situated above the predicted maximum flood level plus freeboard and all basements must be of a waterproof construction;
- Development must not result in an increase in maximum flood levels within adjoining properties
Within Medium Probability Zone 2 development proposals must have:
- Floor levels situated above the 1% (100 year) predicted maximum flood level plus climate change. The SFRA, figure 4 and section 6.4.5 provide further guidance on raised floor levels and predicted flood depths
- Safe escape routes must be provided for evacuation in times of flood, even within areas where buildings are not directly affected
Within all areas of the town centre (including Low Flood Risk Zone 1), development proposals should, where appropriate, include SuDS (Sustainable Urban Drainage Systems) to reduce surface water runoff rates, or as a minimum ensure that future redevelopment does not increase runoff.
For more information please see the Kingston Town Centre Area Action Plan Chapter 11