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Calculate Critical Depth for a Trapezoidal Channel:
 
Calculation:
Designer/Checker:
   
Input:  
   

 
1st side slope, rise/run (s1 - ft/ft or m/m), enter 0.0 for vertical slope.
2nd side slope, rise/run (s2 - ft/ft or m/m), enter 0.0 for vertical slope.
Width of bottom of trapezoidal shaped channel (w - ft or m)
Flow volume (Q - cfs or cms)
   

     
   
   
Output:  
 
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Critical Depth (dc) =
 
 
 
 
 


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