A "barrage" is a type of dam or barrier built across a river or waterway to control water flow. It can help manage water levels, prevent flooding, and generate hydroelectric power. Barrages often have gates that can be opened or closed to regulate the amount of water passing through. In addition to controlling water, barrages can also create a reservoir, which can be used for irrigation or recreational activities. They are important structures in water management and are often found in areas where rivers are prone to seasonal changes in flow, such as those influenced by climate or weather patterns.