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

If D is the depth of water upstream of the throat above its sill, B is

1.	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 BD 1/2
B.	Q = 1.71 BD
C.	Q = 1.71 BD 3/2
D.	Q = 1/71 BD 2/3
Answer» D. Q = 1/71 BD 2/3