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Calculate Stormwater Time of Concentration using Kerby's Equation
Calculate Stormwater Time of Concentration using Kerby's Equation
Developed from data obtained in watersheds having water cources less than 1200 ft, slopes less than 1% and areas less than 10 ac.
Kerby's roughness coefficient (n)
Length of overland flow (Lo)
Slope of overland flow (S)
CALCULATE
RESET
Result
Time of Concentration (Tc)
min
n - Kerby's roughness coefficient
Lo - Length of overland flow
S - Slope of overland flow
Tc - Time of Concentration
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