Bioswales are vegetated drainage ways that function by slowing runoff as it comes off an impervious surface, such as parking areas. Bioswales remove sediments and other pollutants and provide infiltration into the soil during small rain events. Maintaining and enhancing natural drainage ways can save money by eliminating the need to install storm sewers.
Parking Lot Bioswale Detail (PDF)
Parking Lot Bioswale at Hubble Middle School
Bioswale at Blanchard Alliance Church
Infiltration Trench at the Hubble Middle School
Here are few additional examples of the best management practices (BMPs) successfully implemented in the City of Warrenville: