Physico-chemical assessment of ground water qualities of some areas of Imphal East district of Manipur during post-monsoon-4th phase
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Fifteen ground water samples (represented by S-1 to S-15) were collected from different locations of Imphal East district of Manipur during post-monsoon of 2014. They were analyzed for physico-chemical parameters like temperature, pH, TDS (total dissolved solids), electrical conductivity (EC), total alkalinity (TA) (and hence CO32- and HCO3-), total hardness (TH), Ca2+, Mg2+, Na+, K+ and Cl−. Only ground waters represented by S-14 (of Achanbigei Makha Leikai) and S-15 (of Achanbigei Mayai Leikai) are found to be fit for drinking purpose from physico-chemical analysis point of view. However, ground waters represented by S-1 to S-13 may also be used for drinking purpose in absence of alternate sources and further it is necessary to treat them so as to keep high values of total alkalinity (for S-1 to S-13) and total hardness value for S-3 within acceptable limit (200 mg/L) of BIS standard for drinking water. All the fifteen ground waters are fit for other domestic purposes also. Besides these, all the fifteen ground waters (S-1 to S-15) are fit for irrigation purpose also.
Further, strong positive correlations exist between TDS and each of electrical conductivity and total alkalinity for the ground waters (S-1 to S-15). Again correlation co-efficient data reveals that presence of NaHCO3 and KHCO3 in such ground waters, attribute to high values of both TDS (and hence EC) and total alkalinity (TA). Further, strong correlations of Ca2+ and Mg2+ with TH (total hardness), indicate the direct proportionality of total hardness values to concentrations of Ca2+ and Mg2+ ions for the different ground waters (S-1 to S-15).
Physico-chemical parameters, drinking, irrigation, , post-monsoon, BIS and correlation co-efficient.