SEASONAL VARIATIONS IN CERTAIN PHYSICO-CHEMICAL PARAMETERS OF IMPHAL, IRIL AND THOUBAL RIVERS FROM MANIPUR RIVER SYSTEM, INDIAM. Romeo Singh and Asha Gupta
Assessment of physico-chemical parameters were carried out during April 2008 to March 2009 from three rivers namely the Imphal, Iril and Thoubal rivers. One site from each of the three rivers were selected. The sites selected were site-1 Sanjenthong (Imphal River), site-2 Sawombung bridge (Iril River) and site-3 Thoubal bridge (Thoubal River). All the three sites were subjected to various anthropogenic activities of man, passing through the residential areas and are located in the urban environment. Analyses of periodically collected river water was made with references to various physico- chemical parameters like pH, Temperature, secchi transparency, depth, water current, TDS, conductivity, Dissolved Oxygen, Free CO2, Total alkalinity, Chloride, Total hardness, Ca and Mg hardness, NO3-N, PO4-P and K. From the values of all these parameters, it was observed that, there was a fluctuating behavior throughout the said period. The highest degree of pollution were found at site-3 of Thoubal River followed by site-1 of Imphal River and site-2 of Iril river. The present investigation indicates high progressive pollution levels in the 3 rivers during monsoon than in summer and winter season.
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