Strategic Flood Risk Assessment - South Worcestershire ...

Sources of Flood Risk:Primary flood risk to the site is fluvial from the Elmbridge Brook, resulting fromovertopping of the banks. The majority of the western branch of the site falls withinFlood Zone 3b; a small portion of the eastern branch of the site falls within FloodZone 2. The western branch of the site falls within the Yellow Zone of the PolicyMaps. The Westwood-Briar Mill road and Hunters Way, the main access roads tothe site are at risk from fluvial flooding.This site is shown to be partially within one of the County Council’s historic floodhotspots.Surface water presents a low risk to the site. Further development and creation ofimpermeable surfaces may result in an increase of surface water flood risk. TheWestwood-Briar Mill road and Hunters Way, the main access roads to the site are atrisk from surface water.Surface Water Drainage:As an indication of requirements to manage surface water runoff at the development site anassessment of the soil types, greenfield runoff rate and attenuation storage volume is includedbelow. Storage volumes displayed are calculated with an assumption that 75% of the site will bedeveloped impermeable ground. A 25% increase in rainfall depths has been included torepresent predicted future climate change effects.PLEASE NOTE: This assessment has been carried out using broad-scale datasets and aims toprovide an indication of the likely opportunities and constraints for this development site. Adetailed drainage assessment based on site-specific conditions should be carried out by asuitably qualified professional and submitted with any planning application. The values belowshould not be used for design purposes.Soil TypeUnknown – Less Permeable2012s5947 S Worcestershire Level 2 SFRA Update FINAL Report v1.0.doc 106