Effects of groundwater level fluctuation on its chemical composition in karst soils of Lithuania |
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| Authors: | Aurelija Rudzianskaite Povilas Sukys |
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| Institution: | (1) Water Management Institute of Lithuanian University of Agriculture, Parko 6, Vilainiai, 58102, Kedainiai District, Lithuania;(2) Kaunas University of Technology, Donelaicio 73, Kaunas, 44029, Lithuania |
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| Abstract: | Groundwater regime and mineralization process in moraine sandy loam and peat soils of the active sulphatic karst zone (karst
processes develop in the Upper Devonian gypsum–dolomites) in Lithuania and the dependence of chemical compounds concentrations
on water level fluctuations are reviewed. According to ion sum, groundwater mineralization in peat soil is 1.1–1.3 times higher
than in loam soil. Based on this result, lower levels of groundwater predetermine a more intensive mineralization process.
A stronger correlation was determined between groundwater levels and concentrations of chemical compounds (Ca2+, Mg2+, SO4
2− and HCO3
−) enhancing groundwater mineralization. In mineral soil (sandy loam) nitrate (NO3)− concentration is highly influenced by changing stages of groundwater level as well as by nearby sinkholes. |
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| Keywords: | Groundwater level Chemical compounds concentrations Karst |
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