Changes

==Select a surface ponding depth to begin sizing with==

==Select a surface ponding depth to begin sizing with==

* Step 2: Determine a maximum surface ponding depth (''d_{p, max}'')

* Step 2: Determine a maximum surface ponding depth (''d_{p, max}'')

For practices without underdrains:

For practices without underdrains,

<math>d_{p, max}=f'\times48</math>

<math>d_{p, max}=f'\times48</math>

{{Plainlist|1=Where:

{{Plainlist|1=Where:

For practices with underdrains see recommended maximum surface ponding depth for each filter media blend in the table above.<br>

For practices with underdrains see recommended maximum surface ponding depth for each filter media blend in the table above.<br>

* Step 3: Select a design surface ponding depth, d_p' (m) to begin sizing with<br>

* Step 3: Select a design surface ponding depth, d_p' (m) to begin sizing with<br>

For practices with soft (i.e. landscaped) edges and bowl-shaped ponding areas calculate the mean surface ponding depth:

For practices with soft (i.e. landscaped) edges and bowl-shaped ponding areas calculate the mean surface ponding depth,

<math>d_{p}'=d_{p, max}\times 1/2</math>

<math>d_{p}'=d_{p, max}\times 1/2</math>

For practices with hard edges and vertical-walled ponding areas (e.g., stormwater planter, soil cell) use the maximum ponding depth:

For practices with hard edges and vertical-walled ponding areas (e.g., stormwater planter, soil cell) use the maximum ponding depth,

<math>d_{p}'=d_{p, max}</math>

<math>d_{p}'=d_{p, max}</math>