Vauxhall Nine Elms Battersea Opportunity Area Planning Framework

Vauxhall Nine Elms Battersea Opportunity Area Planning FrameworkTA 07 Water strategyMayor of London341Surface water floodingSurface water flooding typically arises asa result of intense rainfall, often a shortduration that is unable to soak into theground or enter drainage systems. As themajority of the OA is heavily developed, therisk of surface water flooding is increased.Overland paths should be taken into accountin spatial planning for urban developments.In order to reduce surface water floodrisk and mitigate the impacts of climatechange (particularly the expected increasein intensity of rainfall), it is important toapply the London Plan Sustainable DrainageHierarchy (Policy 4A.14). In particular thishierarchy places surface water dischargeto combined sewers at the bottom of thehierarchy. Given the proximity of the Thamesit is important for clean surface water fromthe OA to be directed to the Thames.London Borough of WandsworthFigure 6A from London Boroughs ofWandsworth, Merton, Sutton and Croydon’sLevel 1 SRFA indicates that the OA is locatedwithin EA flood zone 3a where flooding isa high probability. The OA in its entirety isdesignated as an area that benefits fromflood defences.North0 1 km2 kms© Crown copyright. All rights reserved (LA100032379) (2009)Opportunity AreaParksFlood Zone 3Flood Zone 2Tidal flood defence design standard - 1000 yearsFluvial flood defence design standard - 50 yearsArea benefitting from defencesBorough boundaryFigure TA7.6 Wandsworth flood defences (NFCDD)