onlinechannel04.php:   Critical slope in a prismatic channel

Definition sketch for a prismatic channel

Q = (k/n) AR2/3S1/2
A = y(b + zy)
P = b + 2y(1 + z2)1/2
T = b + 2zy
R = A/P
D = A/T
V = Q/A
F = V/(gD)1/2
Sc = gn2(Pc/Tc)/(k2Rc1/3)



Flow discharge Q:  

Bottom width b:  

Side slope z:  

Bottom slope S:  

Manning's n:  


Normal flow depth yn:    0

Normal flow area An:    0

Normal wetted perimeter Pn:    0

Normal top width Tn:    0

Normal hydraulic radius Rn:    0

Normal hydraulic depth Dn:    0

Normal flow velocity Vn:    0

Normal Froude number Fn:    0

Units constant k:    0

Gravitational acceleration g:    0


Critical flow depth yc:    0

Critical flow area Ac:    0

Critical wetted perimeter Pc:    0

Critical top width Tc:    0

Critical hydraulic radius Rc:    0

Critical hydraulic depth Dc:    0

Critical flow velocity Vc:    0

Critical Froude number Fc:    0

Critical slope Sc:    0


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