The vegetation traps organic and mineral particles that are then incorporated into the soil, while the vegetation takes up any nutrients.įilter strips are often integrated into the surrounding land use, for example public open space or road verges. No significant attenuation or reduction of extreme event flowsįilter strips only attenuate the flow slightly but they can be used to reduce the drained impermeable area.įilter strips are effective at removing polluting solids through filtration and sedimentation.Not suitable for draining hotspot runoff or for locations where risk of groundwater contamination, unless infiltration is prevented.Easily integrated into landscaping and can be designed to provide aesthetic benefits.Easy to construct and low construction cost.Encourages evaporation and can promote infiltration.Well suited to implementation adjacent to large impervious areas.They treat runoff by vegetative filtering, and promote settlement of particulate pollutants and infiltration. They are designed to accept runoff as overland sheet flow from upstream development and often lie between a hard-surfaced area and a receiving stream, surface water collection, treatment or disposal system. Filter strips are gently sloping, vegetated strips of land that provide opportunities for slow conveyance and infiltration (where appropriate).
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