Weirs and Barrages


Definition:“Its a low height Dam constructed across the river to increase the water level at upper stream and to control the discharge or flow of water into the ponds, irrigation land, reservoirs or to flood control, is called a weir”


Definition:“It is a type of low-head Dam over a river which stored water behind it at upper-stream to increase water level and consists of number of gates that regulate water to supply to irrigation land, for power generation (mechanical power to electrical), to divert water, to control flood, to maintain discharge, is called barrages.”

Basic Difference between Weirs & barrage
  • Barrage is comparatively a big structure compared to weir.
  • Barrage has regulators in the form of sluice gates which control flow of water while weirs doesn’t have any gates.
  • Barrages control discharge and increase level of water by means of sluice gates (regulators) while Weirs control water flow and increase level only by its fixed super-structures (normally Concretes + Stone Masonry) upto its fixed height.
  • Barrages can produce power generation by its tidal energy while weirs normally not do that.
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weirs and Barrages: Youtube

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