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→Calculate the remaining dimensions
* Step 7: Calculate the required total storage (in m<sup>3</sup>):
* Step 7: Calculate the required total storage (in m<sup>3</sup>):
<math>Storage=RVC_T\times Catchment area\times0.095</math>
<math>Storage=RVC_T\times A_c\times0.095</math>
{{Plainlist|1=Where:
{{Plainlist|1=Where:
*''RVC<sub>T</sub>''' = Runoff volume control target (mm), and
*''RVC<sub>T</sub>''' is the Runoff volume control target (mm), and
* Area (Ha)
* ''A<sub>c</sub>'' is the catchment area (Ha)
* 0.095 is the product of a typical runoff coefficient for impermeable surfaces (0.95) and the units correction between m<sup>3</sup> and mm.Ha.}}
* 0.095 is the product of a typical runoff coefficient for impermeable surfaces (0.95) and the units correction between m<sup>3</sup> and mm.Ha.}}