APFIVE Urban Stormwater Runoff Formula
The volume of runoff, V, in cubic meters, from an urban area during a storm is approximated by the formula $$V = A \cdot R \cdot C$$, where A is the area in m², R is the rainfall intensity in m/s, and C is the runoff coefficient. All of the following statements about this model are true EXCEPT:
A
The formula accounts for the combined effects of area, rainfall intensity, and surface characteristics via the runoff coefficient.
B
For a storm with the above parameters on a fully paved area, the runoff volume is zero for an area of 10,000 m².
C
The total runoff volume is directly proportional to the area affected.
D
A runoff coefficient less than 1 indicates that some of the rainfall infiltrates the ground.
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