Major hydel projects entail large-scale ecological disaster and human displacement . For regional and remote area development, the ministry of non-conventional energy sources (MNES) is promoting small hydro projects (SHP) of up to three mw. The ministry has conducted a nation-wide survey state-wise and has identified a total potential for 2,039,67 mw in 25 states and the Union Territory of Andaman and Nicobar Islands.