Bioretention media storage

thumb|box plot of nine documented bioretention media Bioretention filter media may be assumed to have a storage capacity of 0.4.

A shallow excavated surface depression containing prepared filter media, mulch, and planted with selected vegetation.

The engineered soil component of bioretention cell or dry swale designs, typically with a high rate of infiltration and designed to retain contaminants through filtration and adsorption to particles.