SURFACE WATER (LAKES) QUALITY ASSESSMENT IN NAGPUR CITY (INDIA) BASED ON WATER QUALITY INDEX (WQI)

摘要

This paper is intended to be a study concerning with surface water (lakes) quality in Nagpur city (India) based on water quality index (WQI). In present study, water quality index (WQI) has been calculated for different surface water resources especially lakes, in Nagpur city, Maharashtra, (India), for the session January to December 2008; comprising of three seasons, summer, winter and rainy season. Sampling points were selected on the basis of their importance. Water quality index was calculated using water quality index calculator given by National Sanitation Foundation (NSF) information system. The calculated (WQI) for various studied lakes showed fair water quality in monsoon season which then changed to medium in winter and poor for summer season. Gorewada lake showed medium water quality rating in all season except monsoon season. Futala, Ambazari and Gandhisagar lake has also declined in aesthetic quality over past decade following invasion of aquatic weeds such as hydrilla and water primrose, so the reasons to import water quality change and measures to be taken up in terms of surface water (lakes) quality management are required.