A trapezoidal grassed waterway is constructed along a longitudinal gradient of

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A trapezoidal grassed waterway is constructed along a longitudinal gradient of 4%. If the cross-sectional area of flow is 1.52 m2, wetted perimeter is 12.5 m and Manning's n for the waterway is 0.04 m-1/3 s, the flow through the waterway in m3 s-1 is

Options:

A . 1.9

B . 2.1

C . 2.3

D . 2.5

Answer: Option A

-NA-

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