onlinechannel_03:   Discharge in a partially full circular culvert
 Formulas

r = D/2
θ = 2cos-1[1 - (y/r)]
A = 0.5r2(θ - sinθ)
P = rθ
R = A/P
Q = (C/n) AR2/3S1/2
V = Q/A
INPUT DATA:

Select:      

Pipe diameter D:       

Flow depth y:       

Bottom slope S:       

Manning's n:     

INTERMEDIATE CALCS:

Constant C:   

Flow area A:   

Wetted perimeter P:   

Hydraulic radius R:   

Relative depth y/D:   

Froude number [based on y]:   

OUTPUT:

Discharge Q:   

Flow velocity V:   

            

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