Question: The depth downstream of a sluice gate in a rectangular wooden channel of width (5 mathrm{~m}) is (0.60 mathrm{~m}). If the flowrate is (18 mathrm{~m}^{3}

The depth downstream of a sluice gate in a rectangular wooden channel of width $5 \mathrm{~m}$ is $0.60 \mathrm{~m}$. If the flowrate is $18 \mathrm{~m}^{3} / \mathrm{s}$, determine the channel slope needed to maintain this depth. Will the depth increase or decrease in the flow direction if the slope is

(a) 0.02;

(b) 0.01?

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