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A vertical sluice gate in a long rectangular channel 5 m wide is lowered to produce...

A vertical sluice gate in a long rectangular channel 5 m wide is lowered to produce an opening of 1.0 m. Assuming that the free flow conditions exist at the vena contracta downstream of the gate verify that the flow in the vena contracta is supercritical when the discharge is 15 m3/s and determine the depth just upstream of the gate, Cv = 0.98; Cc = 0.6. Take the upstream velocity energy coefficient to be 1 and that at the vena contracta to be 1.2. (ans. 2.09 m)

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