Hydraulics2D

Open Channel Flow: Uniform Flow - Theory & Concepts

Open-channel geometry, uniform-flow resistance, normal depth, and hydraulically efficient sections.

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Uniform Open-Channel Flow: Manning Equation

Discharge, Q10.0 m³/s

Energy slope, S0.0010

Manning roughness, n0.015

Bottom width, b2.0 m

Normal depth, yₙ = 2.891 m

Mean velocity

1.729 m/s

Hydraulic radius

0.743 m

Hydraulic depth

2.891 m

Froude number

0.325

Subcritical

Q=\frac{1}{n}AR^{2/3}S^{1/2}

Uniform flow assumes a prismatic reach, steady discharge, hydrostatic pressure distribution, and energy slope approximately equal to bed slope. Manning n is empirical and must match lining condition, vegetation, irregularity, and scale.

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Uniform Open-Channel Flow: Manning Equation

Normal depth, yₙ = 2.891 m

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