Assessment And Characterization Of Water Quality Of Imphal River Using Hydrogeochemical And Multivariate Methods, Manipur

IJEP 41(8): 884-892 : Vol. 41 Issue. 8 (August 2021)

Wazir Alam*, S. Keisham, R. J. Laishram, Y. Gyanendra and N. Nesa

Manipur University, Department of Forestry and Environmental Science, Canchipur, Impha l- 795 003, Manipur, India


Water quality and hydrogeochemical assessment of Imphal river water within Imphal city were carried out for pre-monsoon and post-monsoon seasons. Significant downstream variations in water quality parameters were observed for pH, temperature, EC, oxidation reduction potential (ORP), turbidity, total hardness, DO, NO3, PO43-, SO42- and more distinct changes were observed during the post-monsoon season. Geochemical evaluation indicates Na+-K+-Cl-HCO3 and Na+-K+-Cl-HCO3-SO42- type of water during pre-monsoon and post-monsoon, respectively. Statistical investigation indicates the factors controlling the Imphal river water quality as well as identifies the source of variation among the samples. Factor analyses were carried out for 4 factors that account for around 82.34% and 77.79% of the variability of the data during pre-monsoon and post-monsoon, respectively. Irrigation water quality was evaluated using an irrigational water quality index that exhibits overall satisfactory to good quality water.


Hydrochemistry, Multivariate analysis, Water quality index, Ecohydrology, Irrigational water, Urban runoff, Sewage disposal


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