Question: A rectangular sharp-crested weir with end contractions is (1.5 mathrm{~m}) long. How high should the weir crest be placed in a channel to maintain an

A rectangular sharp-crested weir with end contractions is $1.5 \mathrm{~m}$ long. How high should the weir crest be placed in a channel to maintain an upstream depth of $2.5 \mathrm{~m}$ for $0.5 \mathrm{~m}^{3} / \mathrm{s}$ flow rate?

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