Irrigation Engineering
The main cause of meandering is

presence of an excessive bed slope in the river
degradation
the extra turbulence generated by the excess of river sediment during floods
None of these

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Irrigation Engineering
A counter berm is

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

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