Variations in water quality characteristics of Serlui river as impacted by Serlui-B hydel project in Kolasib district, Mizoram

Sangeeta Sunar¹

1. Department of Environmental Science, Mizoram University, Aizawl, India.

Correspondence should be addressed to: sangeetasunar90@gmail.com.

Section:Research Paper, Product Type: Isroset-Journal
Vol.3 , Issue.6 , pp.39-47, Jun-2017

Online published on Jun 30, 2017

Copyright © Sangeeta Sunar . This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
 

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Abstract :
The Serlui river is one of the most important natural resource systems in Kolasib district, Mizoram, India. The present study was conducted for a period of one year i.e., from March 2015 to February 2016 to assess the impact of Serlui-B Hydel Project on the water quality of Serlui river, as river water is directly used for drinking and various other domestic purposes by the local people settled in vicinity. Altogether, three sampling sites were selected for detailed investigation along the river from upstream to downstream along the hydel project. The water samples were collected at monthly interval for analysis of various parameters namely, Temperature (22.2˚C-34.3˚C), pH (6.1-7.7), Electrical Conductivity (81µS-154µS), Dissolved Oxygen (5.7-8.1mgL-1), Biological Oxygen Demand (0.6-2.2mgL-1), Acidity (31-68 mgL-1 CaCO3), Total Alkalinity (18-70mgL-1 CaCO3), Chloride (21-145.67mgL-1CaCO3), Phosphate-P (0.017-0.210mgL-1) and Nitrate-N (0.14-0.60mgL-1). The findings reveal that intensity of pollutants increased from Site 1 (Upstream- Control Site) to Site 3 (Downstream), indicating impact of hydel project on river water quality. It is revealed that values are within the prescribed limits as given by various scientific agencies, except Phosphate-P. But long term use of such water may lead to adverse effects on human beings as well as aquatic life. Thus, there is an ample scope of proper treatment of water before use.

Key-Words / Index Term :
Pollutants, Serlui-B hydel project, Serlui river, Water quality standards, Water treatment

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