Detention Basins

Code: 
U10
Sector: 
Urban
Other sector(s): 
Agriculture
Forest
Hydro Morphology
The complete description of the NWRM: 
Summary: 

Detention basins are vegetated depressions designed to hold runoff from impermeable surfaces and allow the settling of sediments and associated pollutants. Stored water may be slowly drained to a nearby watercourse, using an outlet control structure to control the flow rate. Detention basins do not generally allow infiltration: see U12 for infiltration basins.

Detention basins can provide water quality benefits through physical filtration to remove solids/trap sediment, adsorption to the surrounding soil or biochemical degradation of pollutants. 

Detention basins are landscaped areas that are dry except in periods of heavy rainfall, and may serve other functions (e.g. recreation), hence have the potential to provide ancillary amenity benefits.  They are ideal for use as playing fields, recreational areas or public open space. They can be planted with trees, shrubs and other plants, improving their visual appearance and providing habitats for wildlife.

Illustration(s): 

Infiltration basin

Source: Andras Kis’ presentation, NWRM Workshop 1

 

Possible benefits with level: 
Benefits Levelsort descending
ES7 - Flood risk reduction High
PO9 - Take adequate and co-ordinated measures to reduce flood risks High
PO11 - Better protection for ecosystems and more use of Green Infrastructure High
BP1 - Store runoff High
BP2 - Slow runoff High
PO2 - Improving status of physico-chemical quality elements Low
PO4 - Improving chemical status and priority substances Low
PO12 - More sustainable agriculture and forestry Low
ES3 - Natural biomass production Low
ES6 - Groundwater/aquifer recharge Low
BP6 - Increase infiltration and/or groundwater recharge Low
BP7 - Increase soil water retention Low
BP16 - Reduce peak temperature Low
BP17 - Absorb and/or retain CO2 Low
ES1 - Water storage Medium
ES4 - Biodiversity preservation Medium
ES5 - Climate change adaptation and mitigation Medium
ES8 - Erosion/sediment control Medium
ES9 - Filtration of pollutants Medium
ES10 - Recreational opportunities Medium
ES11 - Aesthetic/cultural value Medium
PO7 - Prevent surface water status deterioration Medium
PO14 - Prevention of biodiversity loss Medium
BP5 - Increase evapotranspiration Medium
BP9 - Intercept pollution pathways Medium
BP10 - Reduce erosion and/or sediment delivery Medium
BP14 - Create terrestrial habitats Medium
Last updated: 09 Jun 2015 | Top