Hydrogeochemistry in transboundary thermal water management

Abstract This study gives a brief and general overview of the hydrogeology and hydrogeochemistry of the transboundary geothermal resources in the western part of the Pannonian Basin, carried out within the framework of a joint Hungarian, Slovenian, Slovakian and Austrian project (TRANSENERGY). Chemical and isotope data were used to describe the different flow systems, to calculate the groundwater ages along both the flow paths and the main discharge zones, and to help calibrate the hydrogeological flow and transport models used as input for a sustainable transboundary thermal water management scheme.