Manning equation online calculation
Calculation of the roughness coefficient, flow rate, hydraulic radius, and slope of the line
Select the appropriate unit and enter a value and click on "Calculate". The result will be displayed.
Calculate Flow Velocity
V = Flow Velocity
R = Hydraulic Radius
S = Line Slope
n = Manning's Roughness Coefficient
\(V=\frac {1.49×R^{0.66}×S^{0.5}}{n}\)
Known data: hydraulic radius;line slope; manning roughness coefficient; what is the flow velocity?
Input data: hydraulic radius: 2 ft; line slope: 3; manning roughness coefficient: 1;
Output:flow velocity: 4.07781 ft / sec
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