A barrage is a type of dam or barrier built across a river or waterway to control water flow and levels. It can help manage water for irrigation, flood control, and navigation. Barrages often have gates that can be opened or closed to regulate the amount of water passing through, allowing for better management of water resources. In addition to controlling water levels, barrages can also create a reservoir, which can be used for various purposes, including recreational activities and habitat for wildlife. They play a crucial role in managing water supply in regions where water scarcity is a concern.