SIMILARITY OF GROUNDWATER QUALITY OF THE RIO NEGRO WATERSHED, MS
DOI:
https://doi.org/10.5902/2179460X13129Abstract
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, HCO3 -1, Cl-1, SO4-2, pH, As+3, Cd+2, Cr+6, Cu+2, Fe3+3, Mn+2, Mo+6, Pb+2, alkalinity , hardness , dry residue , C.E, PO4-3, NO3-1, NO2-1. 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 .
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