Bioretention Basins

Bioretention Basin (n) : a shallow landscaped depressions used to slow and clean on-site stormwater runoff. Excess stormwater runoff is directed down a grassed slope into a shallow basin, where it is allowed to slowly permeate through layers of mulch, high-carbon engineered soils and sand; thus filtering the water of pollutants. The cleaned water then seeps into an underdrain system that disperses it back into the native soil.