Strategic Flood Risk Assessment - South Worcestershire ...

Sources of Flood Risk:Primary flood risk to the site is fluvial from Laughern Brook, resulting fromovertopping of the banks to the west and north of the site. Approximately half of thesite, the north and west portions fall within Flood Zone 3. The north and westportions of the site are located within the Blue Zone of the Policy Maps. The A44Bromyard road, the main access road to the site is 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 very low risk to the site. Further development and creationof impermeable surfaces may result in an increase of surface water flood risk. TheA44 Bromyard road, the main access road to the site is at risk 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 TypeFluvial DepositsGreenfield Runoff Rate (l/s/ha) 1 in 2 year 9.12012s5947 S Worcestershire Level 2 SFRA Update FINAL Report v1.0.doc 66