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Calculate Required Diameter for Pipe Outlet Control:
 
Calculation:
Designer/Checker:
 
Input:
 

 
Pre-development peak runoff rate (qpb - cfs or cms)
Water surface elevation at design volume (Es - ft or m)
Pipe centerline elevation (Ec - ft or m)
Trial diameter of pipe (D - in or mm)
Manning's roughness coefficient (n)
Length of pipe (L - ft or m)

   
   
   
Output:  
 
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Kp =
C =
Diameter, D =
 
 
 
 
 



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