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Calculate Stormwater Time of Concentration using Kirpich's Equation:
*Used widely in urban areas for both overland flow and channel flow and for agricultural watersheds up to 200 ac.
 
Calculation:
Designer/Checker:
   
Input:  
   
 
Length of flow path (L - ft or m)
Average slope of along flow path (S - ft/ft or m/m)

 
   
 
Output:
 
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Time of Concentration (Tc) =
 
 
 



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