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→Calculate the remaining dimensions
*''A<sub>i</sub>'' is the impervious area within the catchment (Ha), and
*''A<sub>i</sub>'' is the impervious area within the catchment (Ha), and
* 10 is the units correction between m<sup>3</sup> and mm.Ha.}}
* 10 is the units correction between m<sup>3</sup> and mm.Ha.}}
* Step 12. Divide required storage (m<sup>3</sup>) by the active storage depth of the practice, d<sub>a</sub> (in m) to find the required footprint area (''A<sub>p</sub>'') for the bioretention in m<sup>2</sup>.
* Step 12. Divide required storage (m<sup>3</sup>) by the active storage depth of the practice, d<sub>a</sub> (in m) to find the required storage reservoir footprint area (''A<sub>p</sub>'') for the bioretention in m<sup>2</sup>.
* Step 13. Calculate the peak [[flow through perforated pipe|flow rate through the perforated pipe]],
* Step 13. Calculate the peak [[flow through perforated pipe|flow rate through the perforated pipe]],
* Step 14. Calculate the peak [[flow through media|flow rate through the filter media]],
* Step 14. Calculate the peak [[flow through media|flow rate through the filter media]],