Sustainable Drainage Advice

Information about managing surface water using Sustainable Drainage Systems instead of conventional drainage methods.

Managing surface water is more than just taking care of the water quantity. Sustainable Drainage Systems (SuDS) also need to consider water quality, public amenity and biodiversity.

Conventional drainage systems are only effective at managing water quantity and typically use underground pipes to convey the surface water away from the development.

SuDS are able to manage surface water flows and volumes in open features on the ground surface, while also providing benefits to water quality, public amenity and biodiversity. These systems are more sustainable than conventional drainage methods because they:

  • Manage run-off volumes and flow rates, reducing the impact of urbanisation on flooding;
  • Protect or enhance water quality;
  • Are sympathetic to the environmental setting and the needs of the local community;
  • Provide a habitat for wildlife in urban watercourses.

Critical Drainage Areas

Information about Critical Drainage Areas and how developments can manage surface run-off within them.

Infiltration Testing

If you are proposing soakaways to manage the surface water, then infiltration testing is required to confirm that the ground is suitable for a soakaway, and what size is required.

Consultees and Legislation

To help us assess the development for flood risks, we consult with relevant bodies including the Environment Agency and Devon County Council.