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The discharge over a rectangular weir, considering the velocity of approach, is (whereH1 = H + Ha = Total height of water above the weir, H = Height of water over the crest of the weir, and Ha = Height of water due to velocity of approach)

A. (2/3) Cd × L.√2g [H1 - Ha]

B. (2/3) Cd × L. √2g [H1 3/2 - Ha 3/2]

C. (2/3) Cd × L.√2g [H1 2 - Ha 2]

D. (2/3) Cd × L. √2g [H1 5/2 - Ha 5/2]

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