Strategic Flood Risk Assessment - Wiltshire Council

Wiltshire CouncilSFRA High Level Executive SummarySettlementPotentialdevelopmentsites intersectFlood Zone 1Potentialdevelopmentsites intersectwith ClimateChange FloodZone 3bPotentialdevelopmentsites intersectwith ClimateChange FloodZone 3aOther floodsourceswithinurban areaCricklade Salisbury District• Domestic and commercial properties, transport links and farmland have been subjectedto damage and disruption by fluvial, surface water and groundwater flooding;• Four properties (September 2007) have been identified as being currently at risk fromsewer flooding. Wessex Water are currently undergoing works to eliminate the majorityof foul sewage flooding incidents by 2010;• There are 21 reservoirs, five of which are considered under the Reservoir Act 1975(volume greater than 25000 m 3 ). Proposed development downstream of thesereservoirs will require a site specific FRA to assess the potential flood risk;• Flood depth maps for the 1 in 100 year event within Tisbury, Downton and Salisburyare provided within the existing Level 1 SFRA. These maps can be used as anindication of where to direct development to reduce flood risk;• Within SDCs administrative area, areas of search have been identified by the originalhousing topic paper 2 , which supports the Core Strategy Preferred Options document 3 .A preliminary review undertaken, as part of the existing Salisbury Level 1 SFRAindicates that four out of seven ‘Areas of Search for Development’ intersect withClimate Change Flood Zones 3b and 3a. A similar approach was undertaken for theexisting urban areas within Salisbury identified in Table 4-3 below. This indicates thatall the main settlements have urban areas located within Flood Zone 1 althoughpotential development sites within these towns have not been identified within the Level1 SFRA.Table 4-3: Flood Zone classification for the main urban areas within SalisburySettlementUrban areaintersect withFlood Zone 1Urban areaintersect withClimate ChangeFlood Zone 3bUrban areaintersect withClimate ChangeFlood Zone 3aOther floodsourceswithinurban areaSalisbury Tisbury Wilton Mere 2 http://www.salisbury.gov.uk/topic2-housing.pdf3 http://www.salisbury.gov.uk/core-strategy-preferred-options.pdf17 June 2009