ASSESSMENT OF WATER QUALITY AND MAJOR THREATS TO MORNA RESERVOIR IN WESTERN GHATS (M.S.) INDIAM.R. ABDARAbstract Morna reservoir, a small inland reservoir located in Sangli district Maharashtra state, India is constructed over Morna River in the basin of Krishna. The physico- chemical characteristics, trophic status, planktonic analysis of Morna Reservoir have been studied from April 2007 to March 2009. The nutrients including Silicate (2.5 to 8.25 mgL-1), Sulphates (1.7 to 8.8 mg L-1), nitrates (0.011 to 0.034 mgL-1 ), Phosphates (0.022 to 0.055 mgL-1), and potassium (3.25 to 5.7 mg L-1) are in sufficient quantities which favored the growth of plankton. The presence of Cyanophyceae, Bacillariophyceae, Euglenophyceae and some species of zooplankton like rotifers, cladocerans, copepods and ostracods were recorded during the study period. The value calculated for the Simpsons index of diversity of phytoplankton (0.688) and zooplankton (0.629) indicated a diversity of zooplankton in the reservoir is under category of mesotrophic water body slightly inclined towards eutrophication. Therefore, the conservation and management of this water body is urgently required.
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