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→Determine the active water storage depth of the practice
* Step 4: Identify the active water storage components of the practice<br>
* Step 4: Identify the active water storage components of the practice<br>
For practices without an underdrain, the active storage components include the surface ponding, mulch and filter media depths (i.e. total depth of the practice, d<sub>T</sub>):
For practices without an underdrain, the active storage components include the surface ponding, mulch and filter media depths (i.e. total depth of the practice, d<sub>T</sub>):
<math>d_{a}=d_{p}'+ d_{m}\times n_{m} + d_{f}\times n_{f}</math>
<math>d_{a}=d_{p}'+ (d_{m}\times n_{m}) + (d_{f}\times n_{f})</math>
{{Plainlist|1=Where:
{{Plainlist|1=Where:
*d<sub>T</sub> = Total depth of the practice, including surface ponding}}<br>
*d<sub>T</sub> = Total depth of the practice, including surface ponding}}<br>