Changes

#[[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_T'') of the practice, calculate the required practice footprint area (''A_p''), as:

If there is a constraint to the depth (''d_T'') of the practice, calculate the required practice footprint area (''A_p''), 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>