If D is the depth of water upstream of the throat above its sill, B is the width of the throat, to achieve critical flow in an open venturi flume, the theoretical maximum flow Q, is
A
Q = 1.71 $${\text{B}}{{\text{D}}^{\frac{1}{2}}}$$
B
Q = 1.71 BD
C
Q = 1.71 $${\text{B}}{{\text{D}}^{\frac{3}{2}}}$$
D
Q = 1.71 $${\text{B}}{{\text{D}}^{\frac{2}{3}}}$$
Correct Answer: Q = 1.71 $${\text{B}}{{\text{D}}^{\frac{3}{2}}}$$
