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Sources of Major Ions and Their Temporal Variations in the River Nethravati, Southwest Coast of India

Balakrishna, K and Lalithakumari, S and Poojary, H and Braun, Jean-Jacques (2008) Sources of Major Ions and Their Temporal Variations in the River Nethravati, Southwest Coast of India. International Journal of Earth Sciences and Engineering. pp. 29-35. ISSN 0974-5904

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Abstract

Major ion chemistry of the Nethravati, a small west flowing river along the south west coast of India is studied for a period of one year to understand the different sources of major ions, their temporal variations and the role of anthropogenic impact on the river. Twelve monthly sampling trips to the study area are made, one in every month at Bantwal town (BC Road), which is the fresh water end member near the river mouth. The temporal variations of the major ions in the Nethravati River are studied and the possibility of pollution in the Nethravati River is explored. The concentration of NO3 is high during the peak flow due to agricultural runoff. The concentrations of Cl and SO4 is negligible indicating that there is little pollution in the river. Ternary diagrams indicate that the Nethravati river receives its major ions mainly from natural sources by chemical weathering of rocks in its catchment. When the major ions in the Nethravati River are compared with the major ions in other Indian rivers, it was observed that Nethravati river was more towards the silicate end member indicating dominance of silicate weatheringv its catchment.

Item Type: Article
Subjects: Engineering > MIT Manipal > Chemical
Engineering > MIT Manipal > Civil Engineering
Depositing User: MIT Library
Date Deposited: 29 Jun 2013 11:33
Last Modified: 29 Jun 2013 11:33
URI: http://eprints.manipal.edu/id/eprint/136417

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