Irrigation Engineering
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

Q = 1.71 BD
Q = 1.71 BD3/2
Q = 1.71 BD1/2
Q = 1/71 BD2/3

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Irrigation Engineering
Which one of the following statements is correct?

All listed here
The canal system runs on ridges, gets divided into smaller channels and spreads its water on the land
The canal system and the drainage system are complementary
The drainage system runs along the lowest line, collects drainage water from the slopes and joins the main stream

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