AIH Fundamentals of Hydrology Examination

Practice session

A rectangular concrete stormwater channel has a bottom width of 4.0 m and carries water at a uniform depth of 1.0 m. The bed slope is S = 0.0009 and Manning's roughness coefficient is n = 0.015. Using Manning's equation in SI units (V = (1/n) × R^(2/3) × S^(1/2)), what is the flow velocity?

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