Integrated evaluation of urban groundwater hydrogeochemistry in context of fractal behaviour of groundwater level fluctuations |
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| Authors: | Andrea Farsang Ildikó Fejes Tivadar M Tóth |
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| Institution: | 1. Department of Physical Geography and Geoinformatics, University of Szeged, Szeged, Hungary;2. Department of Mineralogy, Geochemistry and Petrology, University of Szeged, Szeged, Hungary |
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| Abstract: | The present study was carried out as part of a complex survey of urban groundwater quality and quantity in Szeged, southeast Hungary. The concentrations of 12 inorganic contaminants in 28 shallow groundwater monitoring wells were determined over a 2-year period (2010–2012). The evaluation of concentrations indicates remarkable contamination all over the city. Discriminant analysis (DA) was used to evaluate the spatial changes of groundwater quality. The groundwater levels were measured over a 14-year period (2000–2013). The fractal properties of water level fluctuations time series characterizing the groundwater system and Tisza River were investigated using rescaled range (R/S) analysis. The resulting Hurst exponents clearly showed the persistency and thus long memory effects of both the groundwater and the river flow. Comparison of the results of DA with the results of R/S analysis thus implies that the geological conditions and the changing groundwater quantities are not related to groundwater quality. EDITOR A. CastellarinASSOCIATE EDITOR A. Fiori |
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| Keywords: | shallow groundwater R/S analysis Hurst exponent contamination principal component analysis discriminant analysis |
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