Guwahati: Small dams will not be sustainable in the North East region. Versatile projects with very safe designs of medium to big dams on the tributaries of the Brahmaputra will be an inevitable option in the days to come.
Explaining Prof Sarma view, who is currently adviser to the governments of Himachal Pradesh, Bihar, Uttar Pradesh, Haryana, Rajasthan, Kerala and Orissa, moreover the Central Government, on water resources development and management, said that heavy residue ingress from the watersheds results in fast silting up of the storage reservoirs of the region.
As well, small dams have small storage space for flood control, irrigation and hydel power generation. Then, they cannot be used for multi-use projects.
Small dams are feasible only in stable geological areas like the European countries, where well-preserved watershed areas are available.
As per prerequisite, dams can be reinforcing to oppose earthquakes by providing wider dam base with a praise downstream face slope and by vertical pre-stressing of the dam, he said.