SUstainable Drainage Systems (SUDS)

Link to Sustainable Design Option explanation

Matchborough First School SUDS
Matchborough First School SUDS

Matchborough First School,
Worcestershire County Council

During construction it was discovered that one playground area at the school could not be drained naturally to the local pumping station.  The use of SUDS was proposed to overcome the gradient problem and remove the need for the pumping station and associated ongoing maintenance costs.

The SUDS scheme follows the contours of the site and drains downhill to a stream which removes the annual charge for the sewer connection. The system connects to a man-made wetland, which also takes runoff directly from the roof and provides amenity as well as well as a educational resource.

The system has been designed to cope with a 1 in 100 year storm event, and overland flow routes have been provided for events exceeding this.

Parking area with underlying SUDS (SG Photography Ltd.)
Parking area with underlying SUDS (SG Photography Ltd.)

Ysgol Gynradd Gymunedol Bro Sion Cwilt,
Ceredigion County Borough Council

The SUDS system used at the school is located beneath the majority of the parking areas. It comprises Marshalls priora permeable paving covering an area of 1030m2.

Rainwater falling on the car park drains through the block paving and then through a hard core layer below into the ground. Rainwater is ‘naturally’ and evenly disposed of across an extensive paved area rather than being channeled into a soakaway system.

Sustainable Drainage System at Walsley Hills High School and Holywell Primary School
Sustainable Drainage System at Walsley Hills High School and Holywell Primary School

Walsley Hills High School and Holywell Primary School,
Worcestershire County Council

A retrofit SUDS scheme has been installed at the sites of Holywell Primary School and Walsley Hills High School in Worcestershire. This system has involved intercepting overland flow from adjacent land in collector swales, storage of unpredictable water volumes in landscaped features, replacement of conventional drainage infrastructure that is undersized for severe storms and reduction of silt blocking using silt interceptors and re-routing of drainage to natural features.

Cascade and feature wetland have been developed which provide amenity benefit.

The SUDS system saves on sewerage disposal charges, which amount to an annual cost of £3,879 combined.

WLGA - CLILC Llywodraeth Cynulliad Cymru / Welsh Assembly Government