Sustainable Drainage Systems (SuDS)

Sustainable Drainage Systems (SuDs) are required for all surface water drainage systems for new development. Appropriately designed, constructed and maintained SuDs contribute to sustainable development through mitigation of the many adverse effects of stormwater runoff to the environment.

Key SuDs features include:

• Minimising runoff rates and volumes therefore reducing flooding and flood risk for watercourses;
  
• Minimising pollutant concentration in stormwater, and hence within receiving watercourses;
  
• Reducing the volume of surface water runoff into existing combined sewers reducing the occurrence of combined sewer overflows (CSO) spills;
  
• Enhancement of amenity and aesthetic value to developed areas; and
  
• Provision and replacement of habitat for wildlife in urban areas and opportunities for biodiversity enhancement.
  
• Ecological enhancement during design to preserve and enhance nature conservation interest