Naslov
Multidisciplinary Approach to Conceptual Modelling of Topusko Hydrothermal System, Croatia

Autori
Pavić, Mirja ; Borović, Staša ; Pola, Marco ; Briški, Maja ; Kosović, Ivan ; Frangen, Tihomir ; Urumović, Kosta ; Matoš, Bojan ; Pavičić, Ivan

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
13th European Geothermal PhD Days / - , 2022, 19-19

Skup
13th Euroepan Geothermal PhD Days (EGPD 2022)

Mjesto i datum
Aachen, Njemačka, 27.04.2022. - 29.04.2022

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
hydrothermal system, multidisciplinary research, natural thermal springs, Topusko

Sažetak
Topusko hydrothermal system is located at the junction of two major tectonic units: the southwestern margin of the Pannonian Basin System (PBS) and the Dinarides. The PBS is known for its high geothermal gradient and surface heat flow. Thus, the north-eastern part of Croatia has favorable geothermal characteristics (average geothermal gradient 49 °C/km ; average surface heat flow 76 mW/m2), where natural thermal water springs, with temperatures up to 65 °C, emerge at two dozen localities. In the past fifty years, these waters served as a basis for developing tourism and health care centers. In the last forty years thermal water has also been used for heating in the city of Topusko. Thermal springs are part of hydrothermal systems, including recharge areas in the mountainous hinterlands of the springs, geothermal aquifers – in Croatia mostly Mesozoic carbonate rocks, and discharge areas in places with favorable structural characteristics of higher permeability. Refining of the available conceptual model will be based on multidisciplinary research which is currently underway. Hydrogeological, geothermal, hydrogeochemical, structural, and geophysical investigations and remote sensing will be used to construct an improved conceptual model. Its physical validity will be tested through numerical simulations supported by 3D geological reconstructions and local hydrogeological and thermal parameterization of the hydrostratigraphic units. Sustainable use of natural thermal springs cannot be planned or ensured without understanding at the system level. Having good conceptual and numerical models enables the delineation and protection of recharge areas and the determination of sustainable pumping rates. Preliminary results of ongoing research will be presented: geochemical characterization of thermal water, stabile and radioactive isotope signatures, geothermometry, as well as the identification of fault damage zones in the spring area using electrical resistivity tomography.

Izvorni jezik
Engleski

Znanstvena područja
Rudarstvo, nafta i geološko inženjerstvo

POVEZANOST RADA