Sustainable Drainage System Design is a part of the storm water management that usually becomes the main cause of flood in big cities. GES offers its expertise in assessing, evaluating and creating detailed engineering design (DED) of a sustainable drainage system. GES are experts in the selection process of different SuDS (Sustainable Urban Drainage) features to optimise storage, water quality and amenity aspects whilst being sensitive to the commercial implications this can give to a development scheme. We provide a full range of services from an initial SuDS suitability assessment through to providing detailed drawings and calculations for submission to lead local flood authorities and drainage boards.