ABSTRACT
A 3-year geochemical study of groundwater has been undertaken in the main aquifers of Slovenia. Sampling locations include springs, groundwater observation boreholes, piezometers and wells, and surface waters. The chemical composition of Ca2+, Mg2+ content and their molar ratios in groundwater were studied in 175 water samples. The objective was to evaluate groundwater Ca2+ and Mg2+ content in various lithological rock types in the aquifers. Based on the Ca2+/Mg2+ molar ratio in groundwater it was possible to estimate the prevailing carbonate rock in the recharge area, and by calculating the saturation indexes of calcite and dolomite to determine the chemical equilibrium status between carbonate minerals and groundwater.
