Abstract
This study was carried out to estimate the water quality index of Kanwar wetland, which is one of the largest natural, inland wetlands in the Gangetic plain and supports water demands of a larger population. We have identified seventeen water parameters and monitored them in three stretches, i.e., upper, middle and lower, of the wetland for 3 years from 2014 to 2016. We developed a rating scale on the basis of previously reported guidelines and the tolerance limits given by various standardization agencies for the surface water. Further, the weightage was given to each parameter as per their importance in the range of 1–5, and finally water quality index value was calculated by the weighted arithmetic method. The water quality index values (73–79) are of class-II-type water that requires preliminary treatment before human use. All water quality parameters varied significantly across the wetland stretches during the study years. In year 2014, water quality index value was the lowest and showed maximum extent uniformity, but during the years 2015 and 2016 it increased and the uniformity reduced across the wetland stretches, which is an indication of deteriorating quality of water.
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Acknowledgements
The authors are thankful to the Ministry of Environment and Forest, Government of Bihar, India, for granting the permission to conduct the work in the Kanwar wetland. We are obliged to one and all whoever has helped by any way to successfully conduct the work and to the Pondicherry University, India, for providing laboratory facilities and financial aids.
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Singh, A.K., Sathya, M., Verma, S. et al. Spatiotemporal variation of water quality index in Kanwar wetland, Begusarai, India. Sustain. Water Resour. Manag. 6, 44 (2020). https://doi.org/10.1007/s40899-020-00401-y
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DOI: https://doi.org/10.1007/s40899-020-00401-y