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Advantages of dams are a lot as following. 1  agriculture-it stores and provides water for agriculture. 2  electricity generation-to rotate wings of turbine we are still using the water energy in terms of kinetic and static or water pressure energy.
Water pushes against the dam, but the buttresses are inflexible and prevent the dam from falling over. Buttress or hollow gravity dams were originally built to retain water for irrigation or mining in areas of scarce or expensive resources but cheap labour.A buttress dam is a good choice in wide valleys where solid rock is rare.ater pushes against the dam, but the buttresses are inflexible and prevent the dam from falling over. Buttress or hollow gravity dams were originally built to retain water for irrigation or mining in areas of scarce or expensive resources but cheap labour.