Flow of the river is its master variable which affects many other variables like water quality, sedimentation, biodiversity,
etc. Dams profoundly affect this natural flow. Unfortunately, in India there are very few studies which systematically
analyse impacts of a dam on a river and its biodiversity in the pre and post dam situation. This is especially true for dams
built in 1960s, 70s and 80s. We have limited database and nearly no biodiversity studies of river richness prior to and after