 There are several other places around Nagarjunasagar that can be visited as a one-day trip from Hyderabad.The artificial lift irrigation based diversion of the river from its natural delta area into Nalgonda district caused erosion of the Fluorine rich volcanic rocks in Nalgonda and contaminated its groundwater supply.It also caused uncertain flows of water into the Krishna river delta area and a shrinkage of the natural wonder "The Kolleru Lake".