ABSTRACT
The Cracow-Cze˛stochowa Upland is the largest karst area in Poland. Within its borders is a fissure-karstic aquifer associated with the Upper Jurassic carbonate rocks. This paper presents directions of infiltration water chemical evolution, especially variability of Ca and Mg concentrations in precipitation (rain and snow), cave waters of the vadose zone as well as waters of the phreatic zone (springs and wells) sampled at the Cracow Upland. The processes of carbonate leaching based on hydrogeochemical modeling are described, taking into account the chemical and mineral composition of the Upper Jurassic limestones. The study was carried out at the research areas of Pr dnik catchment between 1995 and 2006 and on the Zakrzówek horst between 1996 and 1997.
