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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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        Abstract - Issue Mar 2013, 34 (2)                                                                                                             Back

nstantaneous and historical temperature effects on a-pinene

Evaluation of the physico-chemical characteristics

of river Varuna at Varanasi, India


S.R. Barai* and Satish Kumar

P.G. Department of Zoology, Udai Pratap Autonomous College, Varanasi 221 002, India

*Corresponding Author email :




Publication Data

Paper received:

30 April 2011


Revised received:

29 October 2011


Re-revised received:

19 January 2012



26 July 2012



In present investigation an attempt was made to assess variation in physico-chemical characteristics of river Varuna at Varanasi. The water samples were collected monthly from five sites during January to December 2009 and analyzed for physico-chemical properties. The investigation showed variation in temperature (18.5-32.5oC), transparency (13.5-77.0cm), pH (8.0-8.8), alkalinity (96-486 mgl-1), free CO2 (1.6-64 mg l-1), DO (0.12-8.4 mg l-1), BOD (3.6-116.5 mg l-1), COD (5.9-225.4 mg l-1), chloride (11-80mg l-1), nitrate (0.036-0.996 mgl-1) and phosphate (0.06-1.36 mg l-1). From the investigation it is clear that there was marked variation in different parameters at different sites during the different months of the year. The site-5 was found to be highly polluted (BOD 116.5 mg l-1) whereas the site-1 (BOD 3.6 mg l-1) was the least polluted.


Key words

River Varuna, Physico-chemical parameters, River pollution


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