HyTheC - Multidisciplinary approach to conceptual modelling of hydrothermal systems in Croatia

2021 ◽  
Author(s):  
Mirja Pavić ◽  
Staša Borović ◽  
Maja Briški ◽  
Tihomir Frangen ◽  
Kosta Urumović
Keyword(s):  
Thermal Water ◽  
Pannonian Basin ◽  
Structural Characteristics ◽  
Hydrothermal Systems ◽  
Data Availability ◽  
System Level ◽  
Thermal Waters ◽  
Geophysical Research ◽  
Research Project ◽  
Systems Research

<p>The increase in thermal water utilisation is foreseen by many European and Croatian strategic documents regulating energetics, tourism, environmental protection and sustainable development. Croatian Geological Survey wishes to establish a multidisciplinary group for hydrothermal systems research which will contribute to responsible geothermal development in our country through a 5-year research project HyTheC which started in 2020.</p><p>Pannonian part of Croatia has favourable geothermal characteristics and natural thermal water springs emerge at two dozen localities, with temperatures up to 65 °C. These waters have been used for millennia, and in the past fifty years they are a basis for the development of tourism and health care centres which use the thermal water resource for heating, therapy and recreation (Borović & Marković, 2015). As their water demand increased, higher quantities were abstracted and additional intake structures and wells were constructed.</p><p>Thermal springs are part of hydrothermal systems which include: recharge areas in the mountainous hinterlands of the springs; geothermal aquifers - in Croatia mostly fractured and karstified Mesozoic carbonate rocks (Borović et al., 2016) - in which water resides and gets heated due to heat flow from the Earth; and discharge areas in places with favourable structural characteristics of higher permeability. The continuous functioning of such systems depends on a delicate balance between groundwater flow velocities, precipitation/dissolution processes and structural framework.</p><p>In order to maintain that balance and use thermal water resources in a sustainable manner, a system-level understanding is required. Multidisciplinary methodology (structural geology, hydrogeology, geothermal, hydrogeochemical and geophysical research and remote sensing) will be used to construct conceptual models of systems, perform 3D geological modelling, hydrogeological and thermal parametrisation of the geological units involved in the thermal fluid flow, and conduct numerical simulations of system functioning in undisturbed conditions and with different extraction scenarios.</p><p>This methodology will be tested in three pilot areas in Croatia where thermal water is being utilized (Daruvar, Hrvatsko zagorje and Topusko). These three areas have significantly different levels of initial data availability and it shall therefore be determined which methodology and order of application of different methods should be applied while researching the systems with considerable existing data, medium amount of data and very scarce data, respectively.</p><p>Keywords : hydrothermal system, natural thermal spring, multidisciplinary research, Croatia</p><p>References</p><p>Borović, S. & Marković, T. 2015 : Utilization and tourism valorisation of geothermal waters in Croatia. Renewable and Sustainable Energy Reviews, 44, pp. 52-63.</p><p>Borović, S., Marković, T., Larva, O., Brkić, Ž. & Mraz, V. 2016 : Mineral and Thermal Waters in the Croatian Part of the Pannonian Basin. U: Papić, P., ur., Mineral and Thermal Waters of Southeastern Europe. Cham: Springer, pp. 31-45.</p><p> </p><p>ACKNOWLEDGMENT</p><p>The Installation Research project HyTheC (UIP-2019-04-1218) is funded by the Croatian Science Foundation.</p>

scholarly journals Geothermal potential, chemical characteristic and utilization of groundwater in Serbia

2021 ◽  
Author(s):  
Tanja Petrović Pantić ◽  
Katarina Atanasković Samolov ◽  
Jana Štrbački ◽  
Milan Tomić
Keyword(s):  
Geothermal Energy ◽  
Thermal Water ◽  
Pannonian Basin ◽  
Local Population ◽  
Hydrochemical Facies ◽  
Energy Utilization ◽  
Thermal Waters ◽  
Groundwater Temperature ◽  
Geothermal Resources ◽  
Geothermal Potential

Abstract In order to collect and unify data about all geothermal resources in Serbia, a database is formed. The database allows us to perceive the geothermal resources of Serbia and their potential for utilization. Based on the data available in the geothermal database, the estimated temperatures of reservoirs, heat power, and geothermal energy utilization were calculated. The database contains 293 objects (springs, boreholes) registered at 160 locations with groundwater temperature in the range between 20°C and 111°C. The maximum expected temperature of the reservoir is 146°C (according to the SiO2 geothermometer). Some thermal water is cooled while mixed with cold, shallow water. Geothermal resources are mostly used for balneology and recreation, and less for heating, water supply, bottling, fish and animal farms, agriculture, and technical water. 26% of all geothermal resources is used by the local population or has not been used at all. The annual utilization of geothermal energy for direct heat is 1507 TJ/yr, and the estimated capacity of geothermal energy in Serbia is 111 MWt. The results of analytical work were presented in the form of maps with a geological and hydrogeological background. Thermal waters are mostly registrated in the area of Tertiary magmatism. The three geothermal potential areas are identified: Pannonian basin-Vojvodina Province, Mačva-Srem and area from Jošanička Banja to Vranjska Banja (southern Serbia). Based on chemical analyses, four hydrochemical facies are distinguished. Thermal water mainly belongs to NaHCO3 or CaMgHCO3 hydrochemical facies, usually depending on the primary aquifer: karst, karst-fissured, intergranular or fissured.

scholarly journals Analysis of Hydrothermal Systems Beneath Tayukeng through Long-Term Geochemical Signals of Hydrothermal Fluids in Tatun Volcano Group, Taiwan

2021 ◽  
Vol 18 (14) ◽  
pp. 7411
Author(s):  
Hsin-Fu Yeh ◽  
Hung-Hsiang Hsu
Keyword(s):  
Surface Temperature ◽  
Hydrothermal System ◽  
Hydrothermal Fluid ◽  
Thermal Water ◽  
Hydrothermal Systems ◽  
Hydrothermal Fluids ◽  
Geochemical Variations ◽  
Northern Taiwan

The Tatun Volcano Group (TVG) is located in northern Taiwan and consists of many springs and fumaroles. The Tayukeng (TYK) area is the most active fumarole site in the TVG. In this study, we analyzed the long-term geochemical variations of hydrothermal fluids and proposed a mechanism responsible for the variation in TYK. There are two different aquifers beneath the TYK area: a shallow SO42−-rich aquifer and a deeper aquifer rich in Cl−. TYK thermal water was mainly supplied by the shallow SO42−-rich aquifer; therefore, the thermal water showed high SO42− concentrations. After 2015, the inflow of deep thermal water increased, causing the Cl− concentrations of the TYK to increase. Notably, the inferred reservoir temperatures based on quartz geothermometry increased; however, the surface temperature of the spring decreased. We inferred that the enthalpy was lost during transportation to the surface. Therefore, the surface temperature of the spring does not increase with an increased inflow of deep hydrothermal fluid. The results can serve as a reference for understanding the complex evolution of the magma-hydrothermal system in the TVG.

Potentials of transboundary thermal water resources in the western part of the Pannonian basin

Geothermics ◽  
2015 ◽  
Vol 55 ◽  
pp. 88-98 ◽  
Author(s):  
Nina Rman ◽  
Nóra Gál ◽  
Daniel Marcin ◽  
Julia Weilbold ◽  
Gerhard Schubert ◽  
...  
Keyword(s):  
Water Resources ◽  
Thermal Water ◽  
Pannonian Basin

Mercury concentrations in thermal waters of the Bolshoi Semyachik hydrothermal system, Russia, Kamchatka.

2021 ◽  
Author(s):  
Anton Nuzhdaev
Keyword(s):  
Hydrothermal System ◽  
Kamchatka Peninsula ◽  
Hydrothermal Systems ◽  
Thermal Waters ◽  
Hydrothermal Solutions ◽  
Average Value ◽  
Thermal Fields ◽  
Gas Jets ◽  
First Time ◽  
Hydrothermal Fields

<p>The study of mercury receipt within volcanic activity zones and large hydrothermal systems recently causes the big interest connected with attempts of an estimation of volumes of natural mercury receipt on a daily surface.</p><p>The hydrothermal system connected with volcanic massif Big Semyachik is one of the largest on the territory of Kamchatka peninsula. On the surface, the hydrothermal system is manifested by three large hydrothermal fields - the Verhnee Field, the parychay Dolina, and the Northern Crater of the Central Semyachik, the heat export from which is estimated at 300 MW (Vakin, 1976). On the surface of the thermal fields hot thermal waters and powerful steam-gas jets are unloaded.  At the same time, due to the inaccessibility of thermal fields remain poorly studied, and in particular, there is no information on the concentrations of mercury in hydrothermal solutions.</p><p>During fieldwork in 2020 all types of thermal waters were sampled, chemical types of waters were established, concentrations of mercury in hydrothermal solutions: for hot thermal waters the average value of mercury was - 0.44 mcg / L, and in steam-gas jets - the average value of mercury was - 4.60 mcg / L.</p><p>Thus, in the course of the work the data on concentrations of mercury in hydrothermal solutions of one of the largest hydrothermal systems of Kamchatka were received for the first time.</p><p> </p>

scholarly journals FDI in the Post-Soviet Space Three Decades after the Disintegration of the Soviet Union

2021 ◽  
Vol 14 (5) ◽  
pp. 30-60
Author(s):  
K. Kalotay ◽  
A. Sulstarova
Keyword(s):  
Soviet Union ◽  
Transition Economies ◽  
Structural Characteristics ◽  
Academic Research ◽  
Data Availability ◽  
Outward Fdi ◽  
Starting Point ◽  
Soviet Space ◽  
Post Soviet Space

The former Soviet Union disintegrated three decades ago. That momentous 1991 was not only the starting point for independence of the countries of the post-Soviet space but also the starting point for their transformation from centrally planned economy to capitalism, often with local specificities. At the moment of writing this article aiming at analysing the long-term, structural characteristics of inward and outward foreign direct investment (FDI), these 12 economies are facing new COVID-19-related challenges, different from the problems of transformation undertaken in the past decades. After a brief literature survey, in which the main issues raised by academic research are highlighted, the article analyses the long-term trends and the main characteristics (geographical and sectoral) of FDI, with special reference to greenfield project announcements from 2003 on (the starting year of data availability). It also explores how much economic development was based on either attracting inward or promoting outward FDI or both. The performance of the 12 post-Soviet economies is controlled against the performance of other transition economies such as the Baltic States, South-East Europe and/or the Visegrad Group. The article concludes that indeed efforts towards using inward or outward FDI for development has been modest, even if in inflows one can observe some convergence with the other transition economies, which have been relying more wittingly using FDI for their development.

System Level Knowledge Representation for Metacognition in Neuroscience

2021 ◽  
Author(s):  
Paola Di Malo
Keyword(s):  
Knowledge Representation ◽  
Data Availability ◽  
System Level ◽  
Levels Of Abstraction

Epistemic and methodological convergence, combined with increased data availability and higher levels of abstraction are leading to greater complexity in neuroscience. This book tackles the challenges relating to complexity and metacognition leveraging a knowledge representation approach.

Applied Multi-Case Research in a Mixed-Method Research Project

2009 ◽  
pp. 120-139 ◽  
Author(s):  
Slinger Jansen
Keyword(s):  
Information System ◽  
Information Systems ◽  
Mixed Method ◽  
Research Area ◽  
Mixed Method Research ◽  
Research Project ◽  
Case Research ◽  
Systems Research ◽  
Information Systems Research

Even though information systems is a maturing research area, information systems case study reports generally lack extensive method descriptions, validity defense, and are rarely conducted within a multicase research project. This reduces the ability to build theory in information systems research using case study reports. In this chapter we offer guidelines, examples, and improvements for multicase studies. If information system researchers stick to these guidelines, case study reports and papers will get published more often, improving the rapidly maturing research area of information systems.

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