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 Line Slope
V = Flow Velocity
n = Manning's Roughness Coefficient
R = Hydraulic Radius
S = Line Slope
\(S=(\frac {V×n}{1.49×R^{0.66}})^2\)
Known data: flow velocity;manning roughness coefficient; hydraulic radius;what is the line slope?
Input data: flow velocity: 3 ft / sec; manning roughness coefficient: 2; hydraulic radius: 1 ft;
Output: line slope: 16.2155;
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