Development in a drainage taking climate change into account. For most ‘critical area’* or Flood Zones 2 developments, this assessment should include existing & 3; and proposed surface water drainage arrangements, Development on sites of 1ha or greater; although for larger developments the requirements of a Development or changes of use to a more site-specific Sustainable Drainage Strategy should be vulnerable class agreed at pre-application stage. (see Table 2 of the NPPF Technical Guidance) that may be subject to land, groundwater, sewer or canal flooding; Development in areas shown on surface water flood maps. See EA website. (for Ipswich see IBC Development and Flood Risk SPD); Development in basements and on lowered ground levels; Land raising where this impacts on surface water flood risk Sites adjacent to roads with no drainage – drainage and flooding of highway issues should be resolved as part of the planning application. Any other specific areas that may be listed in SFRAs Sustainable Sustainable Drainage Systems (SuDs) are SuDs measures must normally be shown on all relevant Drainage required for all applications for major plans submitted, in order to demonstrate how SuDs Systems development (i.e. development of more integrate with planned public open spaces, landscaping, (SuDS) than 10 dwellings (or 0.5 hectares for roads, trees and buildings. Plans should identify residential development where the number multifunctional SuDs e.g. those which enhance of dwellings is unknown) for the creation of biodiversity or improve water quality. Details need to more than a 1000 square metres of floor include any soakage test results & calculations, drainage, space and where the site is greater than 1 design layout & calculations (including summary on SCC hectare). SW Drainage Proforma), proposals for protection of SuDs and watercourses during construction, details of
Sustainable Drainage Systems (SuDS) Development in a ‘critical drainage area’* or Flood Zones 2 & 3; Development on sites of 1ha or greater; Development or changes of use to a more vulnerable class (see Table 2 of the NPPF Technical Guidance) that may be subject to land, groundwater, sewer or canal flooding; Development in areas shown on surface water flood maps. See EA website. (for Ipswich see IBC Development and Flood Risk SPD); Development in basements and on lowered ground levels; Land raising where this impacts on surface water flood risk Sites adjacent to roads with no drainage – drainage and flooding of highway issues should be resolved as part of the planning application. Any other specific areas that may be listed in SFRAs Sustainable Drainage Systems (SuDs) are required for all applications for major development (i.e. development of more than 10 dwellings (or 0.5 hectares for residential development where the number of dwellings is unknown) for the creation of more than a 1000 square metres of floor space and where the site is greater than 1 hectare). taking climate change into account. For most developments, this assessment should include existing and proposed surface water drainage arrangements, although for larger developments the requirements of a site-specific Sustainable Drainage Strategy should be agreed at pre-application stage. SuDs measures must normally be shown on all relevant plans submitted, in order to demonstrate how SuDs integrate with planned public open spaces, landscaping, roads, trees and buildings. Plans should identify multifunctional SuDs e.g. those which enhance biodiversity or improve water quality. Details need to include any soakage test results & calculations, drainage, design layout & calculations (including summary on SCC SW Drainage Proforma), proposals for protection of SuDs and watercourses during construction, details of