Irrigation Engineering
If there are two canals taking off from each flank of a river, then there will be

one divide wall and two undersluices
one divide wall and one undersluice
two divide walls and one undersluice
two divide walls and two undersluices

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Irrigation Engineering
A river is said to be of

Aggrading type if it builds up its bed to a certain slope
Degrading type if it cuts its bed to a certain slope
Meandering type if it flows in sinuous curve
All of these

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