A diversion headwork (barrage) is constructed across a river to:
Choose the correct answer
Store large volumes of water for the entire year
Raise river water level and divert required discharge into canal; does not provide significant storage
Measure the river discharge only
Prevent all flooding downstream
Correct Answer
B. Raise river water level and divert required discharge into canal; does not provide significant storage
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Diversion headwork (weir/barrage): raises water level in river to divert required flow into canal. Components: weir/barrage, divide wall, silt excluder, under-sluices, fish ladder, canal head regulator. Unlike a storage dam, it does NOT store significant water — it only diverts flow into the canal system.
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