abstract_textpThis study describes various groundwater flow systems in mountainous areas where both crystalline and hard sedimentary rock formations can be found. The research was conducted in the Sudeten Mountains, in the Kamienczyk catchment area, which covers 7.85 km(2) (south-western Poland). The water circulation system and the role of tectonic zones were identified and described following an analysis of the water inflow in river systems and sources, as well as measurements of groundwater tables in wells. The modulus of spring runoff equalled 3.81 L.s(-1)/km(2), while the modulus of underground runoff amounted to 6.24-7.17L.s(-1)/km(2). The total discharge index equalled 15.80 L.s(-1)/km(2). Considering the results of the study, it can be concluded that for both the basins Kamienczyk and Kamionka groundwater runoff constituted 60-70 of all precipitation registered in the areas under study. The remaining 30-40 either evaporates or constitutes part of indirect and regional discharge. Areas drained by river sources are usually quite small, that is 0.1 - 0.5 km(2). In the nine years of periodic observations, the average temperature of spring water was in the range of 7.2-7.7 degrees C and the variations were very low. The study results demonstrate that the depth of circulation of the water taking part in spring water discharge is between 35 to 55 m below ground level. The temperature of water in wells in Cretaceous sedimentary rocks, which ranges from 7.8 to 11 degrees C, is suggestive, given the mixing pattern of water inflow from the depths of 150-200 m./p/abstract_text
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