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→Size a bioretention cell with no underdrain for constrained depth
#[[Bioretention]] has a maximum recommended catchment impervious area to practice permeable (footprint) area ratio, R (or I/P ratio) of 20.
#[[Bioretention]] has a maximum recommended catchment impervious area to practice permeable (footprint) area ratio, R (or I/P ratio) of 20.
==Size a bioretention cell with no underdrain for constrained depth==
==Size a bioretention cell receiving flows directly to the storage reservoir for a constrained depth==
If there is a constraint to the depth (''d<sub>T</sub>'') of the practice, calculate the required practice footprint area (''A<sub>p</sub>''), as:
If there is a constraint to the depth (''d<sub>T</sub>'') of the practice, calculate the required practice footprint area (''A<sub>p</sub>''), as:
<math>A_{p}=\frac{A_i\times i\times D}{(d_{T}\times n')+(f'\times D)}</math>
<math>A_{p}=\frac{A_i\times i\times D}{(d_{T}\times n')+(f'\times D)}</math>