Calculate Stormwater Time of Concentration for Overland Flow

Rainfall Intensity (I)

Length of Overland Flow (Lo)

Manning roughness coefficient (n)

Average Slope of Drainage Area (S)

Time of Concentration (Tc)

min

I - Rainfall Intensity
Lo - Length of Overland Flow
n - Manning roughness coefficient
S - Average Slope of Drainage Area
Tc - Time of Concentration