1: Paleozoic shales (impervious base), 2: Karstified Triassic limestones(main karst aquifers), 3: Porphyrites (complete side-barrier), 4: Ultramafics (side-barrier or low-permeable cover), 5: The Diabase-Chert Formation(same as ultramafics), 6: Cretaceous flysh and flysh-like sediments (low permeable cover), 7: Cretaceous limestones (karst aquifer), 8: Neogene sediments (low-permeable cover), 9: Karstic spring, 10 and 11: Directions of karst groundwater flow.