Bio-retention basins can be used to carry stormwater at a controlled rate while also acting as a filter to remove pollutants and allowing stormwater infiltration.
A well-designed basin traps and removes sediments and improves water quality via soil filtration. Peak runoff velocity is reduced as is erosion while the system will recharge groundwater.
Utilising Bio-Retention areas as part of a SuDS scheme
Bio-retention areas manage and treat water after rainfall. They are shallow landscaped underdrained pits and are used to reduce stormwater runoff downstream while also removing pollutants.
Step-by-step of bio-retention SuDS schemes
Bio-retention applications often utilise vegetation and underdrains in order to function effectively.
- Grass strip - this will reduce the run-off speeds and removed suspended solids
- Vegetated area - removes excess nutrients within water
- Shallow ponds - provides storage for excess stormwater
- Mulch - a layer that encourages degrading of pollutants
- Engineered soils - support vegetation growth along with uptake of nutrients
- Sand bed - provide additional drainage and aeriation
- Underdrain - removal of excess treated stormwater from storm drain
If you are looking for assistance with an bio-retention project then we can help. Get in touch today.
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