KSZTAŁTOWANIE SIĘ WARUNKÓW HYDROGEOLOGICZNYCH SZCZELINOWOWO-KRASOWEGO KOMPLEKSU WODONOŚNEGO TRIA SU W REJONIE TARNOWSKICH GÓR (z 10 fig.)

Abstract

HYDROGEOLOGY OF TRIASSIC KARST-FRACTURED AQUIFER IN TARNOWSKIE GÓRY AREA (with 10 Figs.)

Abstract. In the range of Tarnowskie Góry urbanized area the main usable aquifer is the Triassic carbonate complex. This complex is over lain by shallow Quaternary aquifer. This karst-fractured-porous complex is intersected by number of old shafts, galleries of the abandoned Pb–Ag and Fe ore mines. There are also quarries of dolomites. Urban and industrial impact has led to a parallel expansion of groundwater abstraction and to significant modifications of groundwater flow system and water budget. The new sources of groundwater recharge and discharge are in duced or existed sources are intensified. Downward leakage of shallow Quaternary groundwater is a significant component of recharge to the carbonate aquifer. This has been induced by heavy abstraction of groundwater by wells and galleries. Seepage of municipal and industrial waste waters and uncontrolled industrial disposals have produced substantial deterioration in the groundwater quality of the two aquifers. Groundwater of carbonate aquifer is contaminated with elevated concentrations of nitrates, sulphates, chloride and boron and with chlorinated hydrocarbon solvents; trichloroethen and tetrachloroethen. As a consequence, a number of wells are abandoned and some of another ones may be closed in the future.