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→Size a bioretention cell receiving flows directly to the storage reservoir for a constrained depth
*''i'' = Intensity of design storm (mm/h)
*''i'' = Intensity of design storm (mm/h)
*''f''' = [[design infiltration rate]] (m/h)
*''f''' = [[design infiltration rate]] (m/h)
*''n''' = Effective porosity of the fill materials within the active storage component(s) of practice, depth-weighted mean
*''n''' = Effective porosity of the fill material in the storage reservoir of the practice
*''d<sub>r</sub>'' = Storage reservoir depth, based on depth available between the elevation of the invert of the underdrain perforated pipe and one (1) metre above the seasonally high water table or top of bedrock (m) or other value determined to be suitable through groundwater mounding analysis.}}<br>
*''d<sub>r</sub>'' = Storage reservoir depth, based on depth available between the elevation of the invert of the underdrain perforated pipe and one (1) metre above the seasonally high water table or top of bedrock (m) or other value determined to be suitable through groundwater mounding analysis.}}<br>
If R is greater than 20, consider decreasing catchment impervious area (A<sub>i</sub>) by draining less area to the practice.
If R is greater than 20, consider decreasing catchment impervious area (A<sub>i</sub>) by draining less area to the practice.