Pre-Impact Studies of the 2000 MW Lower Subansiri Dam on Certain Aquatic Environmental Aspects of Downstream of the River Subansiri with Special Reference to Plankton and Fishes

Pre-impact studies of the 2000 MW lower Subansiri dam have been carried out from January 2006 to December 2006 on certain hydrobiological aspects of downstream of the river Subansiri viz., physicochemical parameters, phytoplankton, zooplankton and freshwater fish diversity. The water quality is suitable for planktonic and fish diversity. In thedownstreamof proposed dam, a total of 199 taxa have been recorded and identified which include 48 species of algae, 23 species of zooplankton, and 128 species of freshwater fishes belonging to 9 orders, 27 families and 78 genera.