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Curb Gutter Flow Rate Calculation

I want to calculate
Manning's Coefficient(n) =
Roadway Cross Slope(Sx) =
Longitudinal Slope(S) =
Flow Width(T) = ft
Gutter Flow Rate(Q) = ft3/s
 



 
   
  
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Curb Gutter Flow Rate:

Gutter Flow Rate:


Manning's Coefficient:


Roadway Cross Slope:


Longitudinal Slope:


Flow Width:


where,
Q = Gutter Flow Rate,
n = Manning's Coefficient,
Sx = Roadway Cross Slope,
S = Longitudinal Slope,
T = Flow Width.