Irrigation Engineering
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

2.00 D
1.75 D
1.50 D
1.25 D

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Irrigation Engineering
A counter berm is

A horizontal benching provided on the outside slope
A vertical benching provided on the inner edge of the bank
A horizontal benching provided on the inside slope
A vertical benching provided on the outer edge of the bank

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