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→Determine the required surface area of the storage reservoir
* Step 13: Calculate the surface area of the storage reservoir, A<sub>r</sub> (m<sup>2</sup>) needed to capture the infiltration volume target for the design storm event <br>
* Step 13: Calculate the surface area of the storage reservoir, A<sub>r</sub> (m<sup>2</sup>) needed to capture the infiltration volume target for the design storm event <br>
For practices with no underdrain:
For practices with no underdrain:
<math>A_{r}=V_{i}/(d_{i}\times n_{r}')+(f'\times D)</math>
<math>A_{r}=V_{i}/[d_{i}+(f'\times D)]</math>
==Calculate peak flow rates==
==Calculate peak flow rates==