Calculate Hydraulic Radius



App description

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.

Calculation formula

Calculate Hydraulic Radius

R = Hydraulic Radius

V = Flow Velocity

n = Manning s Roughness Coefficient

S = Line Slope

\(R=(\frac {V×n}{1.49×S^{0.5}})^\frac{1}{0.66}\)

Usage example

Known data: flow velocity; manning roughness coefficient; line slope; what is the hydraulic radius?

Input data: flow velocity: 2 ft / sec; manning roughness coefficient: 1; line slope: 3;

Output:hydraulic radius: 0.679590 ft;

 

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