Irrigation - Engineering

Q1:

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 BD1/2

B Q = 1.71 BD

C Q = 1.71 BD3/2

D Q = 1/71 BD2/3

E none of these.

ANS:C - Q = 1.71 BD3/2

Q = 1.7CdB(H)3/2.