Effluent water is flowing in a near-level 1.5 m-wide concrete sluiceway at 0.65 m/s and a depth of 2.2 m upstream of a sluice gate. The sluice gate is opened 0.25 m above the channel invert. (a) Compute the specific energy of the flow approaching the sluice gate. (b) Assuming negligible losses across the sluice gate, what is the flow velocity if the flow depth downstream of the sluice gate is 0.229 m? (c) Compute the Froude number for the flow immediately downstream of the sluice gate. What is the flow condition?

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Spillway design

A spillway is the overflow portion of the dam that carries the surplus discharge flow from the reservoir to the downstream, that is, it carries the flood water safely downstream, which is enough to be stored in that reservoir. Therefore, it acts as a safety valve for the dam because many failures of the dam arise due to the incorrect design of the spillway.