what is a dam? How is it useful
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A wall built across a river to hold back the water and form reserva behind it. many dams are built for more than one purpose for example water in a single reservoir can be used for fishing to generate hydroelectric power and to support an irrigation system
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A dam is a barrier that stops or restrics the flow of water or underground stream .dams are important because they provide water for domestic , industry and irrigation purpose. dams often also provide hydroelectric power production and river navigation. dams and their reservoirs provide recreation areas for fishing and boating. they help people by reducing or preventing floods.
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