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→Size a bioretention cell for constrained ground area
{{Plainlist|1= Where:
{{Plainlist|1= Where:
*''R'' = Ratio of catchment area (''A<sub>c</sub>'') to area of the infiltration practice (A<sub>p</sub>)
*''R'' = Ratio of catchment impervious area (''A<sub>i</sub>'') to practice pervious footprint area (A<sub>p</sub>)
*''A<sub>p</sub>'' = Area (footprint) of the infiltration practice in m<sup>2</sup>
*''A<sub>p</sub>'' = Practice pervious footprint area in m<sup>2</sup>
*''A<sub>c</sub>'' = Catchment area in m<sup>2</sup>}}
*''A<sub>i</sub>'' = Catchment impervious area in m<sup>2</sup>}}
Then calculate the required depth (''d<sub>T</sub>''), as:
Then calculate the required depth (''d<sub>T</sub>''), as: