Unit processes of stormwater pretreatment techniques (Adapted from WEF, 2008)
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Control Vegetated filter strips Vegetated swale Forebays Street/parking lot sweeping Proprietary settling/swirl chambers Oil/water separators Green roofs Cisterns Drain inlet inserts
Peak flow attenuation X X
Infiltration X X
Dispersion X X X
Evapotranspiration X
Runoff collection and usage X
Sedimentation X X X X X X
Flotation X X X
Laminar separation X
Swirl concentration X
Sorption X
Filtration X X X
Plant metabolism X X X
Temperature reduction X X X

This page was last edited on 22 September 2015, at 21:17.

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