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Assessment of NO3 − contamination in a karstic aquifer, with the use of geochemical data and spatial analysis

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Abstract

Kopaida plain is a cultivated region of Eastern Greece, with specific characteristic related with the paleogeographic evolution and the changes in land use. The present article examines the contamination that derives from nitrates, in terms of contaminant levels, definition of sources and spatial distribution of contaminant plume. For this purpose, 50 water samples were collected from the karstic aquifer and analyzed for 15 parameters including major ions, trace elements, physicochemical parameters, and stable isotopes. The assessment of the above parameter values along with the notes derived by the statistical process revealed the existence of nitrate contamination which has been spatial defined with the aid of spatial interpolation techniques. The correlation of NO3 − concentrations with the stable isotope values, defined the infiltration conditions and showed contaminant transport. Nitrate values revealed the potential environmental threat for local people, as 10% of the samples exceeded the parametric value of 50 ppm and 54% of them are above 25 ppm, indicating no optimal quality conditions. The origin of nitrate contamination seems to derive exclusively from the application of N-fertilizers, since the rest of potential sources were not verified by analytical data and field works.

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  1. Echmes Ltd., Environmental Consultants, Illisia, 115 28, Athens, Greece

    Evangelos P. Tziritis

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  1. Evangelos P. Tziritis
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Tziritis, E.P. Assessment of NO3 − contamination in a karstic aquifer, with the use of geochemical data and spatial analysis. Environ Earth Sci 60, 1381–1390 (2010). https://doi.org/10.1007/s12665-009-0274-3

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  • DOI: https://doi.org/10.1007/s12665-009-0274-3

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