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Calculate Underdrain System Discharge:
 
Calculation:
Designer/Checker:
 
Input:
 

(Note: All input Metric units are converted to English units for the equations below and then the output English units are converted back to Metric)
 
Underdrain lateral spacing (S - ft or m)
Length of the underdrain (L - ft or m)
Recovery time of the system (t - hr)
Depth from the natural ground elevation to the water table (c - ft or m)
 
   
   
   
Output:  
 
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Drainage coefficient, q =
Discharge, Qr=
 
 
 
 
 



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