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→Size a bioretention cell with no underdrain for constrained depth
==Size a bioretention cell with no underdrain for constrained depth==
==Size a bioretention cell with no underdrain for constrained depth==
If there is a constraint to the depth (''d<sub>T</sub>'', m) of the practice, calculate the required footprint area (''A<sub>p</sub>'', m<sup>2</sup>), as:
If there is a constraint to the depth (''d<sub>T</sub>'', m) of the practice, calculate the required footprint area (''A<sub>p</sub>'', m<sup>2</sup>), as:
<math>A_{p}=\frac{A_i\times i\times D}{(n\times d_{T})+(f'\times D)}</math>
<math>A_{p}=\frac{A_i\times i\times D}{(d_{T}/times n')+(f'\times D)}</math>
{{Plainlist|1=Where:
{{Plainlist|1=Where:
*''A<sub>p</sub>'' = Area of the infiltration practice in m<sup>2</sup>
*''A<sub>p</sub>'' = Area of the infiltration practice in m<sup>2</sup>
*''i'' = Intensity of design storm in mm/hr
*''i'' = Intensity of design storm in mm/hr
*''f''' = [[design infiltration rate]] in mm/hr
*''f''' = [[design infiltration rate]] in mm/hr
*''n'' = Porosity of the fill materials within the practice, depth weighted mean
*''n''' = Effective porosity of the fill materials within the practice, depth-weighted mean
*''d<sub>T</sub>'' = Total depth of the infiltration practice, including surface ponding (m).}}
*''d<sub>T</sub>'' = Total depth of the infiltration practice, including surface ponding (m).}}