Hidrogeológiai célú geofizikai térké pezés egy tihanyi maar-tó környezetében

The lakes of the Tihany Peninsula are located in maar structures which were formed by the phreatomagmatic volcanism of the region dating 7.96 Ma B.P. (Sacchi, Horváth 2002). Interaction between groundwater and the lakes has not previously been examined. In order to understand the complex hydrogeology of the Tihany Peninsula, geophysical radio-magnetotelluric (RMT) measurements were carried out to determine the electrical resistivity and geometry of shallow formations, and were coupled with hydrogeological observations. Maar lake sediments, maar structure filling pyroclastic deposits and tephra ring formations were able to be distinguished according to the resulting resistivity values. Electrical resistivity values were converted to hydraulic conductivity for each formation. The results of the study improved to clarify the hydrostratigraphic conditions of the area and hydrologic knowledge of the peninsula, and could also be applied to other maar regions.