The chemistry of groundwater: A geoindicator of environmental change across the Polish-Lithuanian border |
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| Authors: | J Giedraitiene J Satkunas M Graniczny S Doktor |
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| Institution: | 1.Geological Survey of Lithuania, Konarskio?35, Vilnius, 2600, Lithuania,;2.Polish Geological Institute, Rakowiecka 4, 00–975 Warszawa, Poland, |
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| Abstract: | Groundwater monitoring in the Polish-Lithuanian cross-border area was launched in 1994, utilizing 24 monitoring stations. Of these, 20 are installed in aquifers in Quaternary tills, which are the main source of fresh water for centralized use and single households. Hydro-chemical sampling has been performed twice a year (spring and autumn) over a seven-year period, with determination of main chemical compounds. Hydrochemical differences on both sides of the border appear to be related to the type of land use. The groundwater quality on the Lithuanian side may have been influenced by anthropogenic factors operating prior to 1991 in the Soviet-type collective farms. The main trends over the monitoring period involve increase in SO42+and Cl- ions on both sides of the border. The data demonstrate the importance of cross-border monitoring and exemplify groundwater chemistry as a direct geoindicator of the state of the environment. |
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