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Geothermal potential of Krapinsko-Zagorska County - Croatia

Favourable geothermal properties which are characteristic of the major part of the Pannonian basin also extend into its south-western margin where Croatia is situated. The Krapinsko –Zagorska County is situated in the Pannonian part of Croatia, in its north-western part, and there are lot of natural thermal springs which are used mainly in balneology and less in other purposes (district heating, individual space heating of communal buildings and in the agriculture sector). The modes of utilization vary according to water temperatures, e.g. waters of the lowest temperatures are used for the public water supply, bottling and fish farming, while waters of the highest temperatures are utilized for water and space heating. Since the production of energy for heating households, industry, buildings etc. in the county territory depends on the import gas from Russia it is advisable to endorse geothermal energy into its energy mix, especially into the heating sector which accounts for 40% of primary energy consumption and for a significant share of CO2 emissions. During the DARLINGe project which is supported by the Danube Transnational Program, will be boost the challenge of the sustainable utilization of the existing thermal groundwater resources in the county area. The most important localities in the county territory where thermal waters occur or they were drilled are: Harina Zlaka, Kumrovec, Stubičke Toplice, Krapinske Toplice, Tuheljske Toplice, Jezerčica, Šemničke Toplice and Gotalovec. According to the water temperature, thermal waters in the county territory are range from subthermal to hyperthermal (22 – 45 oC). According to the major ionic composition, water from Stubičke toplice belong to a CaMgNa- HCO3SO4 mixed type ; while the rest of thermal waters belong to the CaMg-HCO3 type The most diversified use is accounted for in Stubičke toplice: recreation, balneotherapy, water and space heating, greenhouse heating and sanitary water.

thermal groundwater, water temperature, utilization, Krapinsko-Zagorska County

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