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Calculate Channel Flow (Q) for Any Channel:
 
Calculation:
Designer/Checker:
   
Input:  
   

 
 
Cross section area of channel flow (A - sf or sm)
Hydraulic radius of channel (R = A/WP - ft or m)
Slope of energy grade line, rise/run, (S - ft/ft or m/m)
Manning's Roughness Coefficient (n)
   

     
   
   
Output:  
 
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Discharge, Q =
or metric: Q = (1.00A/n)*(R^2/3)*(S^1/2)
 
 
 
 


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