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- W1901722785 abstract "To investigate the similarity in spatial and temporal scale of water quality of the Black River wetland micro -basin we used cluster analysis and factor analysis . Simple water samples were collected at 12 points (georeferenced) in 2004 . The following parameters were evaluated: Ca +2 , Mg +2 , Na +1 +K +1 , HCO 3 -1 , Cl -1 , SO 4 -2 , pH, As +3 , Cd +2 , Cr +6 , Cu +2 , Fe 3 +3 , Mn +2 , Mo +6 , Pb +2 , alkalinity , hardness , dry residue , C.E, PO 4 -3 , NO 3 -1 , NO 2 -1 . Data reduction by principal component analysis yielded three components with eigenvalues, which explain up to 92.4 % of total variance , with the first component with 48.6 % , the second component with 23.6 % , the third component with 20.2 % . The variability of the components can be used to indicate the hydrodynamic process that controls the quality of water without loss of significant features . The hierarchical cluster analysis formed three distinct groups, determining the types and concentrations of salts analyzed . The water quality of the watershed is mainly influenced by two factors : point sources of pollutants and climatic seasonality ." @default.
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- W1901722785 date "2014-11-14" @default.
- W1901722785 modified "2023-10-01" @default.
- W1901722785 title "SIMILARIDADE DA QUALIDADE DAS ÁGUAS SUBTERRÂNEAS DA BACIA DO RIO NEGRO, MS" @default.
- W1901722785 doi "https://doi.org/10.5902/2179460x13129" @default.
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