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Calculate Stormwater Time of Concentration for Overland Flow:

*Shallow concentrated flow

Calculation:

Designer/Checker:

Input:

Metric Units

Intercept coefficient (k)

Length of overland flow (Lo - ft or m)

Average slope of drainage area (S - %)

Output:

Time of Concentration (Tc) = Lo/(3.28kS^0.5) =

Metric: Tc = Lo/(1kS^0.5) =