SuDS Sustainable Urban Drainage System, South Wales
Using SuDS for the disposal of surface runoff from impermeable areas has a number of advantages including reduced impact on watercourses, reduced diffuse pollution, reduced flows in combined sewers, improved amenity. Reduced construction costs. SuDS are designed to mimic natural drainage systems by using soft landscaped techniques instead of hard engineering. The term SuDS covers a range of sustainable drainage facilities from end of pipe facilities such as wetlands or retention ponds, to source control systems such as soakaways, infiltration trenches, swales and permeable pavements. The working part believes that there is a need for an integrated approach to SuDS design, whereby issues if water quality and water quantity are considered together with amenity and habitat.
The following terms relates to SuDS
- Attenuation - Slowing down the rate of flow to prevent flooding and erosion, with consequent increase in duration of flow.
- Balancing ponds - ponds that hold surface water for a time and allow it to flow to a water course at a reduced rate, hence attenuating the flow
- Detention basin- a basin that is normally dry, constructed to store water temporarily to attenuate flows. As these features are normally dry. They may be used for other purposes when not required for drainage.
- Filter drains - trenches constructed alongside highways which are filled with free draining materials such as shingle, and which may have a perforated pipe running in the bottom of the trench.
- Infiltration basin - shallow depression in the ground which is usually dry but which is used to hold surface water for a time while allowing it to soak into the ground.
- Infiltration trench - a trench, usually filled with stone designed to promote infiltration of surface water to the ground.
- Lagoon - A pond designed for the settlement of suspended solids.
- Permeable paving - hard surfaces usually block paving that allows rainwater to pass through the surface and into the underlying ground.
- Pond – Flow control or water treatment structure that is wet.
- Pound - section of swale that is designed to detain runoff.
- Rainwater Harvesting - Capturing rain where it falls ad using it for non-potable uses such as toilet flushing and garden watering.
- Soakaways - A subsurface structure into which surface water is conveyed, designed to promote infiltration.
- Source Control- The control of runoff at or near its source.
- Swales – shallow, usually grass lined channels, often running alongside roads, designed to drain to water from a site as well as controlling the flow and quality of surface water.
- Wetland - a pond, with emergent vegetation, that is created in order to provide a treatment area for water running off impermeable surfaces and which may contain pollutants such as oil or silt. Long retention periods allow biological action.
SuDS: Sustainable Urban Drainage System Services in:-
Raglan, Usk, Abergavenny, Crickhowell, Monmouth, Cwmbran, Pontypool, Newport, Chepstow, Caldicot, Ross-on-Wye, Hereford, Coleford, Lydney, Blackwood, Caerphilly, Merthyr Tydfill, Abderdare, Ebbw Vale, Abertillery, Pontypridd, Bridgend, Carmarthen, Tenby, Pembroke, Haverfordwest, Milford Haven, Swansea, Neath, Cardiff, Penarth, Cowbridge, Barry, Brecon, Llandovery, Builth Wells. Also, Gloucester, Bristol, Ledbury & Leominster.