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Water approaches a sharp-crested rectangular weir through a channel that is 2 m wide. The depth...

Water approaches a sharp-crested rectangular weir through a channel that is 2 m wide. The depth of flow in the channel is 1 m. The weir crest is 0.6 m above the base of the channel and has a crest width of 0.8 m. It is located in the centre of the channel.

Assuming a coefficient of discharge of 0.61, and ignoring side contractions, determine the discharge over the weir:

a) Assuming the approach velocity is zero
b) Including the approach velocity (iterative procedure)
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