engleski

Multidisciplinary approach to conceptual modelling of hydrothermal systems, Topusko - Croatia.

Natural thermal water springs, with temperatures up to 65 °C, emerge at two dozen localities in the Pannonian part of Croatia which has favourable geothermal characteristics. These waters have been used for millennia, and in the past fifty years they were a basis for the development of tourism and health care centres [1]. As their water demand increased, higher quantities were abstracted and additional intake structures and wells were constructed. A system-level understanding of the factors controlling these resources is necessary for their sustainable utilization. These thermal springs are generally part of intermediate scale hydrothermal systems which include: recharge areas in the mountainous hinterlands of the springs ; geothermal aquifers mostly hosted in Mesozoic carbonate rocks [2] ; and discharge areas in places with favourable structural characteristics increasing the local permeability field. In the scope of HyTheC project, funded by the Croatian Science Foundation, a multidisciplinary approach is used for the characterization of Daruvar, Hrvatsko zagorje, and Topusko hydrothermal systems in central and northern Croatia. Structural, hydrogeological, geothermal, hydrogeochemical, and geophysical investigations and remote sensing will be used to construct conceptual models. Their physical validity will be tested through numerical simulations supported by 3D geological reconstructions and local hydrogeological and thermal parameterisation of the hydrostratigraphic units. The emphasis is placed on the Topusko hydrothermal system with very scarce initial data. The available conceptual model will be refined based on researches which are currently underway.

hydrothermal system, natural thermal spring, multidisciplinary research, Croatia

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