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Uniform Flow — the Manning Equation
Inside this lesson
- Describe uniform flow and explain why the bed, water surface, and energy grade line are parallel at the bed slope S_0
- Apply the Manning equation V = (1/n)R_h^(2/3)S_0^(1/2) (SI) and Q = (1/n)A R_h^(2/3)S_0^(1/2)
- State typical values of Manning's n and explain why its uncertainty propagates into the answer
- Compute velocity and discharge for a rectangular or wide channel of given geometry
- Outline the iterative solution for normal depth given a discharge
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Educational content covering topics typical of a first- and second-year mechanical engineering curriculum. Not a substitute for accredited coursework, and not suitable for real fluid-system design without review by a licensed professional engineer.