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• W1663893079 abstract "Identification of groundwater quality similarities may help to reduce the number of monitoring stations required in water bodies. This research was carried out to identify groundwater quality similarity using a multivariate statistical technique called cluster analysis in the Baixo Acarau Irrigation District (DIBAU) in Ceara, Brazil. Ten shallow wells randomly located in the DIBAU were regularly monitored for a period of 27 months (Dec/2003-Nov/2005, Nov/2006, Mar and Apr/2007). Samples were analyzed for pH, Ca2+, Mg2+, Na+, K+, Cl-, CO32-, HCO3-, SO42-, PO43-, NH4+, NO3-, electric conductivity (EC) and sodium adsorption ratio (SAR). Descriptive statistics, hierarchal cluster analysis, and the t-test (1%) were evaluated using SPSS 16.0. The water in all but two wells was classified as acidic, and the average pH was lower than five. Phosphorus concentrations were always above the recommended limit for human consumption (0.1 mg L-1). Moreover, the results show that the groundwater quality was used to define four clusters that were independent of the geographic position of the wells. EC values, sodium and chloride concentrations in the water samples distinguished two wells (P1 and P7) from the others, and pH, Mg2+ and SAR distinguished these two wells, one from the other." @default.
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• W1663893079 date "2011-09-14" @default.
• W1663893079 modified "2023-09-28" @default.
• W1663893079 title "IDENTIFICATION OF GROUNDWATER QUALITY SIMILARITY USING MULTIVARIABLE ANALYSIS" @default.
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