onlinesideditch.php:   Normal depth in a roadside ditch using the Manning equation


Definition sketch
Formulas:


z = 0.5 (z1 + z2)
A = y(zy)
P = y(1 + z12)1/2 + y(1 + z22)1/2
T = 2zy
R = A/P
D = A/T
Q = (k/n) AR2/3S1/2
V = Q/A
F = V/(gD)1/2

INPUT DATA:

Select:    

Discharge Q:      

Side slope z1:      

Side slope z2:      

Bottom slope S:      

Manning´s n coefficient:      

INTERMEDIATE CALCULATIONS:

Units:   

Gravitational acceleration g:

Constant k:    0

Wetted perimeter P:    0

Top width T:    0

Flow area A:    0

Hydraulic radius R:    0

Hydraulic depth D:    0

Normal depth yn:    0

Mean velocity Vn:    0

Froude number Fn:    0

OUTPUT:

Flow depth
d =    0

Partial width
a =    0

Partial width
c =    0


            

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