Irrigation Engineering
Main purpose of mean water training for rivers is

To provide sufficient depth of water in navigable channels, during low water periods
Flood control
To preserve the channel in good shape by efficient disposal of suspended and bed load
All of these

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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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