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Line 49: − * Catchment impervious area, A<sub>i</sub> (m<sup>2) +
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Before you begin you will need to know the following;<br>
Before you begin you will need to know the following;<br>
* Catchment area (i.e. contributing drainage area), A<sub>c</sub> (m<sup>2)
* Catchment area (i.e. contributing drainage area), A<sub>c</sub> (m<sup>2)
* Catchment runoff coefficient, C
* Catchment runoff coefficient, C
* Catchment impervious area, A<sub>i</sub> (m<sup>2)
* Design storm intensity, i (mm/h)
* Design storm intensity, i (mm/h)
* Design storm duration, D (h)
* Design storm duration, D (h)