Managed aquifer recharge (MAR) is an increasingly popular technique; however, the significance of groundwater flow dynamics rarely examined in detail regarding MAR systems. In general, a high hydraulic gradient not favoured for implementation, as it causes higher water loss and mixing with native groundwater. However, during groundwater-dependent ecosystem (GDE) rehabilitation, these gradient-driven processes can be taken advantage of. The aim this research to test hypothesis by evaluating...

Abstract Groundwater flow and heat distribution was investigated in the regional karstic-fissured aquifer-aquitard system near Lake Bled Slovenian, eastern Julian Alps. The area features thermal springs with temperatures of 19–23 °C which are exploited by abstraction wells. occurrence low-temperature geothermal systems, common Alps, associated specific hydrogeological conditions, such as vertical hydraulic connectivity between different geological formations, relatively large elevation...

Abstract. Water table topography, temperature and solute content of groundwater all influence regional flow. Two-dimensional synthetic numerical calculations were performed to investigate the dynamic interaction between topography-driven forced convection buoyancy-controlled free thermohaline convection. In combined topothermohaline model, recharge flow-through zones are dominated primarily by flow, which drifts warm upwellings towards discharge zone. Beneath zone, a dome with high...

The Buda Thermal Karst is characterised by three geographically and geologically separated discharge areas along the Danube in Hills (Erőss et al, 2012 etc.). These contain lukewarm, lukewarm - warm springs, respectively. This research aims to find an answer question of separation differences these their significance geothermal exploration under confined Pest side.Along with datasets used previous numerical simulations (Szijártó 2021 etc.), Supervisory Authority...

Water shortage is a common challenge worldwide, and the Hungarian Great Plain no exception. Climate change human impacts (canal construction, afforestation, overpumping) have been causing severe water level declines in area since 1960’s. retention solutions are needed to preserve natural vegetation wet ecosystems ensure sustainable agriculture region. can be achieved many ways, but consideration of subsurface environment inevitable. The Nature-Based MAR solution based on...

The diversity of biofilm bacterial communities associated with cave walls the Buda Thermal Karst System (BTKS) located in Hungary was studied by scanning electron microscopy and molecular cloning based on 16S rRNA genes. Samples from two sites, Molnár János (MJB) Rudas-Török spring (RTB), respectively, were analyzed compared. presence iron precipitates typical at both study despite fact that cell morphological structure biofilms observed SEM characteristically different. Clones BTKS found to...

Our recent knowledge about the role of different fluid driving forces in response groundwater flow systems to climate change is still limited. This current study aimed evaluate possible spatial and temporal changes complex, gravity- overpressure-driven induced by look for general trends characteristics field using 2D transient simulations. Results showed significant large-scale subsurface dynamics due recharge reduction. Local gravity-driven are most vulnerable atmospheric processes, while...

The theoretical examination of the combined effect water table configuration and heat transfer is relevant to improve understanding deep groundwater systems, not only in siliciclastic sedimentary basins, but also fractured rocks or karstified carbonates. Numerical model calculations have been carried out investigate interaction topography-driven forced buoyancy-driven free thermal convection a synthetic, two-dimensional model. Effects numerous parameters were systematically studied order...

This study proposes a concept and presents workflow to examine potential reasons for low injectivity of sandstone aquifers. Injection related problems are major challenge the sustainable utilization geothermal waters. In order completely understand avoid reinjection problems, problem sources acting on different scales should be taken into consideration. Thus, in workflow, possible considered regional, reservoir local scale categorized 1) effect regional hydraulics (potential presence...

Salinization of groundwater has endangered e.g. drinking water supply, agricultural cultivation, groundwater-dependent ecosystems, geothermal energy thermal and hydrocarbon well production to a rising degree. In order investigate the problem coupled topography- salinity-driven flow on basin-scale, systematic simulation set been carried out in synthetic numerical model. Detailed sensitivity analysis was completed reveal effect salinity, permeability, permeability heterogeneity anisotropy,...

Springs are sources of freshwater supply. Furthermore, they can also deliver valuable insight into the hydrogeologic processes a mountainous region, natural conservation area or remote study site with no wells. In order to assess appearance, peculiarities, quality, stability, longevity and resilience springs related ecosystems, need be regarded in context basin-scale groundwater flow systems. The application spring data evaluation on basin scale was demonstrated via carbonate system...

The hummocky Balaton Highland is located in western Hungary and part of the Transdanubian Mountains, most extensive carbonate aquifer system Hungary. study region also encompasses Lake Balaton, biggest lake central Europe, which to south Highland. surface water–groundwater interaction Highland–Lake groundwater contribution are revisited this paper. Hydrostratigraphic classification was performed first; then, flow directions by hydraulic head distribution were analysed, baseflow indices...

Following the exposure of a biofilm sample from hydrothermal spring cave (Gellért Hill, Budapest, Hungary) to gamma radiation, strain designated FeSTC15-38T was isolated and studied by polyphasic taxonomic methods. The spherical-shaped cells stained Gram-negative, were aerobic non-motile. pH range for growth 6.0-9.0, with an optimum at 7.0. temperature 20-37 °C, 28 °C. Phylogenetic analysis based on 16S rRNA gene sequence isolate indicated that organism belongs genus Deinococcus. highest...