Journal Articles
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Item Evaluation of water quality index for drinking purposes for river Netravathi, Mangalore, South India(2008) Avvannavar, S.M.; Shrihari, S.An attempt has been made to develop water quality index (WQI), using six water quality parameters Dissolved oxygen (DO), Biochemical oxygen Demand (BOD), Most Probable Number (MPN), Turbidity, Total Dissolved Solids (TDS) and pH measured at eight different stations along the river basin. Rating curves were drawn based on the tolerance limits of inland waters and health point of view. Bhargava WQI method and Harmonic Mean WQI method were used to find overall WQI along the stretch of the river basin. Five point rating scale was used to classify water quality in each of the study areas. It was found that the water quality of Netravathi varied from Excellent to Marginal range by Bhargava WQI method and Excellent to Poor range by Harmonic Mean WQI method. It was observed that the impact of human activity was severe on most of the parameters. The MPN values exceeded the tolerable limits at almost all the stations. It was observed that the main cause of deterioration in water quality was due to the lack of proper sanitation, unprotected river sites and high anthropogenic activities. © Springer Science+Business Media B.V. 2007.Item Feasibility of gurpur river at Malavoor as a sink for Bajpe town domestic waste disposal - A case study(2009) Babu Narayan, K.S.B.; Kumar, J.P.; Yaragal, S.C.; Shrihari, S.Mangalore is one of the fast growing cities in Karnataka with improved infrastructure taking place in recent days. In view of rapid development in and around Mangalore city, the sub urban or rural areas around the city have started developing at a rapid rate. One such place is Bajpe where the town is growing very fast due to the expansion of activity of Bajpe Airport and upcoming SEZ projects. An attempt has been made to find out the load on River Gurupur, if the Bajpe town domestic waste is assumed to be disposed to River Gurupur at Malavoor bridge point downstream without any treatment. Experiments were conducted to find the parameters used to find out the dissolved oxygen (DO) consumption and replenishment in teh river body using BOD-DO river quality model developed by Streeter-Phelps (1925). Model formulation, analysis and the results obtained are discussed in the paper. Copyright © Enviromedia.Item Global water quality indices for river Gurpur, Karnataka State, India(2010) Rajagopal, B.; Shrihari, S.; Dwarakish, G.S.Three water quality indices viz. Drinking Water Quality Index (DWQI), Health Water Quality Index (HWQI) and Acceptability Water Quality Index (AWQI) were developed by United Nations Environment Programme (UNEP) under the Global Environment Monitoring System (GEMS)/Water for global comparison of quality of water sources. In this paper these three global water quality indices were determined for River Gurpur, in Karnataka state of India. Gurpur is one of the important west flowing rivers of India and is the source for industrial needs of fast developing Mangalore city. River water samples were collected from Gurpur River at Gurpur Bridge on National Highway -13 near Mangalore monthly from November 2006 to October 2007. The samples were analyzed for sixteen physico-chemical and bacteriological parameters. The global water quality indices determined for river Gurpur can be designated as 'Fair' during the study period. The seasonal variation in global water quality indices ranged from 'Marginal' to 'Excellent'. © 2010 CAFET-INNOVA TECHNICAL SOCIETY. All rights reserved.