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→Calculate the remaining dimensions
* Step 7: Multiply the depth of each separate component by the porosity and then sum the total to find the 1 dimensional storage (in mm).
* Step 7: Multiply the depth of each separate component by the porosity and then sum the total to find the 1 dimensional storage (in mm).
* Step 8: Calculate the required total storage (S<sub>T</sub>, m<sup>3</sup>):
* Step 8: Calculate the required total storage (S<sub>T</sub>, m<sup>3</sup>):
<math>S_{T}=RVC_T\times A_c\times 10</math>
<math>S_{T}=RVC_T\times A_i\times 10</math>
{{Plainlist|1=Where:
{{Plainlist|1=Where:
*''RVC<sub>T</sub>'' is the runoff volume control target (mm),
*''RVC<sub>T</sub>'' is the runoff volume control target (mm),
*''A<sub>c</sub>'' is the catchment area (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 9. Divide required storage (m<sup>3</sup>) by the 1 dimensional storage (in m) to find the required footprint area (''A<sub>p</sub>'') for the bioretention in m<sup>2</sup>.
* Step 9. Divide required storage (m<sup>3</sup>) by the 1 dimensional storage (in m) to find the required footprint area (''A<sub>p</sub>'') for the bioretention in m<sup>2</sup>.