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Irrigation - Engineering

Q1:

According to Lacey, depth of scour in a river depends upon the straightness of the reach. If D is the depth of scour in regime flow in a right angled bend, it is

A 1.25 D

B 1.50 D

C 1.75 D

D 2.00 D

ANS:D - 2.00 D

Greatly constricted section =>1.00.
Straight Channel =>1.27.
Moderate channel => 1.50.
Sever bend =>1.75.
Right-angled bend => 2.00.