HYDRO-CHEMICAL ANALYSIS AND EVALUATION OF LAKE WATER QUALITY IN AND AROUND MALURPATTANA USING GIS TECHNIQUES, CHANNAPATTANA TALUK, RAMANAGARA DISTRICT, KARNATAKA, INDIA

Lakes play an important role in urban ecosystem and also serve as an important part of ecological balance. Lakes serve as a source of water for irrigation, drinking and domestic purpose for urban and rural population. The selected area for water quality assessment is the area in and around Malurpatna Lake. As this is a drought area there is no natural source of water for these lakes, lakes get their water from nearby Iglur dam. In the study area SAR is observed in excellent group, Percentage of sodium observed 5 samples are in good category and 15 samples in permissible category, for P.I values 14 samples were marginally safe and about 6 samples were not suitable for domestic purposes. The RSC values 17 of them came under safe category with, 1 sample was marginally safe, and 2 samples namely Averahalli and Honganuru Lake were not suitable for domestic purposes.