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Calculate Headwater Inlet Control Culvert With Unsubmerged Inlet:
 
Calculation:
Designer/Checker:
 
Input:
 

 
Culvert cross-sectional area (A - sf or sm)
Design flow/discharge per culvert barrel (Q - cfs or cms)
Slope of culvert barrel (S - ft/ft or m/m)
Interior height of culvert barrel (D - ft or m)
Inlet control constant from table (K)
Inlet control constant from table (M)

     
   
   
Output:  
 
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Headwater, HW =
 
 
 
 
 




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