Free Online Manning Irregular Channel Calculator

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Irregular Channel Manning Uniform Flow Calculator

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Birimleri ayarla: [Hide this line]
Inputs
X
X
Sonuçlar:
Q by sum of regions with composite n per Chow 6-17 equal velocities Q by sum of regions with composite n per Chow 6-17 equal velocities X
Cross section points +/- (or Copy/Paste using data area)
Point Segment Region
Sta

Elev
n
for seg-
ment
Rh, Q
region
boundary
(Bank)
Bot.
shear
τ
T
Pw
A
Rh
Comp.
n
v
Hv
Fr Q

Points data
(comma or tab separated)

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Notes

Q Methods
Q by sum of conveyances underestimates the frictional contribution from steep segments. Q by composite n overestimates the effect of wide shallow (overbank) friction on flow in deeper areas (main channel).
D50 Values
The Strickler D50 is the size (for a straight and clean channel) implied by the roughness entered. The other D50 results are required to resist erosion per 1) Maricopa County and Robinson Rock Chutes, 2) Maynord, Ruff, and Abt (1989), and 3) Searcy (1967)
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