Dams are the structures constructed to divide and retain river water in a particular area. Large dams can ensure the storage of water not just for irrigation but also for generating electricity. Some famous dams in India are the Bhakra Nangal Dam, the Sardar Sarovar Dam and the Tehri Dam. Water from dams is distributed through canal systems that transport stored water to great distances. The disadvantages of dams are deforestation, sedimentation, erosion of river beds, and the disruption of animal and plant life. Also, they displace a large number of peasants and tribals without adequate compensation or rehabilitation. The construction of large dams swallows up huge amounts of public money without the generation of proportionate benefits.
