Volume No. 2 Issue No.: 2 Page No.: 142-154 October-December 200

 

COMPARATIVE STUDY OF DIFFERENT WATER QUALITY INDICES FOR NETRAVATHI RIVER (INDIA)

 

Santosh M.Avvannavar*1, S.Shrihari and Virupaksha K.2

1. Center for Sustainable Technologies, Indian Institute of Science, Bangalore, (India)
2. Faculty of Civil Engineering, NITK, Surathkal, Srinivasnagar, Mangalore, (India)

 

Received on : July 7, 2007

 

ABSTRACT

 

A Comparison of different water quality indices (WQIs) for the river Netravathi has been made using six water quality parameters at various stations located in Dakshina Kannada district, Karnataka, South India. Rating curves were drawn based on the tolerance limits of inland waters and health point of view. Different WQI methods such as weighted, un-weighted Arithmetic indices and Solway index 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. Comparative studies would show the difference in the water quality indices based for the same data. It was observed that the influence of human activity was manifested on most of the water quality 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.

 

Keywords : Water Quality Index, DO, BOD, Turbidity, BOD, Total Coliform, TDS.

 

 

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