# 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}]