what is the difference between weir and a barrage
Answer Posted / pavan
WEIR: an impervious barrier which is constructed across a
river to raise the water level on the upstream side is known
as a weir. Here the water level is raised up to the required
height and the surplus water is allowed to flow over the
weir. Generally it is constructed across an inundation river.
BARRAGE: when adjustable gates are installed over a weir to
maintain the water surface at different levels at different
times is known as a barrage. The water level is adjusted by
operating the gates or shutters. The gates are placed at
different tiers and these are operated by cables from the
cabin. The gates are supported on piers at both ends. The
distance between the pier to pier is known as Bay.
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