Bioswales & Rain Gardens
Bioswales are shallow depressions in the landscape that are gently sloped to collect and direct stormwater. Bioswales remove pollutants as the water filters through plants, soils and stream gravels, allowing the cleaned water to infiltrate into the soil. Also known as vegetated swales, bioswales and can be straight or meandering, simple, or ornate. A bioswale can be planted with grasses, or naturalized to look and function like a stream with river gravels, boulders and native plants that tolerate inundation.
A Rain Garden is a shallow depression in the earth that collects rainwater from a roof, driveway or other urban surface. Planted with drought tolerant and native plants, it reduces stormwater runoff, filters pollutants, and conserves water.
Rain gardens and bioswales can add beauty and even native habitat to any landscape, and can be incorporated into any landscape where water would otherwise run into the open storm drains—from residential yards to commercial parking lots and streetscape improvements. Locating these basins adjacent to roadways and parking areas is an effective way to capture and treat pollutants.