Assessment of Water Quality Index of the Kolong River of Nagaon District of Assam, India
Journal Title: International Journal of engineering Research and Applications - Year 2018, Vol 8, Issue 6
Abstract
The objective of the study is to analyze the Water Quality Index (WQI) and analysis of variations of Water Quality Index parameters along the Kolong River,Nagaon, Assam, after the breaching of Hatimura dyke in 2017. WQI provides a single number that expresses overall water quality at a certain location and time based on several water quality parameters.The objective of a WQI is to turn complex water quality data into information that is understandable and useable by the public.Kolong River flows through the heart of the Nagaon urban area dividing the town into Nagaon and Haiborgaon in Assam.The blockage of the river flow was adopted as a flood control measure to protect its riparian areas, especially the Nagaon town, from flood hazard. So, Hatimura dyke was constructed across the river‟s take-off point near Hatimura in 1964. The river, once a blooming distributary of the mighty Brahmaputra, had high navigability and rich riparian biodiversity with agriculturally productive watershed. However, the present status of Kolong River is highly wretched as a consequence of the post-dam effects thus leaving it as stagnant pools of polluted waterwith negligible socioeconomic and ecological value. But in August 2017, due to heavy flood the Hatimura dyke was breached and the breach allowed floodwaters to flow in through Kolongriver. In this study, river samples were collected and analyzed from twelve different study sites during March 2018 to April 2018, i.e. in pre monsoon period covering the entire river to study the after effect of floodwater in the Kolong river. The physico-chemical parameter of water such as Iron, Nitrate, Manganese, Fluoride,pH, Turbidity, Alkalinity, Total Hardness, Chloride, Dissolve oxygen, Total Dissolve Solids, Ammonia and Bacteria were analyzed. The calculation of Water Quality Index was done by using Weighted Arithmetic Index Method. The WQI value of these samples ranges from 58.87-216.53, which shows that water in all the sites are unsuitable for drinking. Thus, river needs proper treatment to conserve this water body from future contamination and pollutions.
Authors and Affiliations
Bhaswati Dutta, Bibhash Sarma
Keywords
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- EP ID EP394419
- DOI 10.9790/9622-0806042938.
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