Papers by Judit Mádl-Szőnyi
Scientia et securitas, Jun 18, 2024
Bookmarks Related papers MentionsView impact
Journal of Hydrology, Jul 1, 2022
Bookmarks Related papers MentionsView impact
<p>For recent decades, the groundwater level has been decreasing in the area of the... more <p>For recent decades, the groundwater level has been decreasing in the area of the Danube-Tisza Interfluve, Hungary, mainly due to climate change. The average depth of water table is between 5-7 m in the elevated Interfluve area. The shallow eolian and fluvial aquifers of the region can be used to store water between the surface and water table for later extraction or for ecological benefit. Therefore, Managed Aquifer Recharge (MAR) systems could play an essential role in improving the stored water and the water balance in the Danube-Tisza Interfluve.</p> <p>The aim of the research was to carry out a geophysical survey and a complex data processing in order to analyse the characteristics of near-surface sediments of Kerekegyháza town (Danube-Tisza Interfluve, Hungary) for MAR implementation. For a detailed understanding of the shallow geological environment in Kerekegyháza, we used three main data systems and previous interpretations. Stratigraphic information was collected and examined from (1) hydrogeological reports. In addition, (2) archived vertical electric sounding (VES) measurements were reprocessed. Furthermore, (3) two-dimensional electric resistivity tomography (ERT) was performed. Summarizing the lithological and electric resistivity data, 4 geological sections and a complex 3D data system were compiled.</p> <p>Interpreting the preliminary information, a simplified three-layered (uncovered aquifer – aquitard – covered aquifer) geological model was set up in the pilot area. Based on the stratigraphic information and the electric resistivity values, the geological setting is more heterogeneous than the simplified model. Hence the determined layers are not horizontally continuous, except for the uncovered dry sand or quicksand aquifer with 0-3 m thickness. Below that, presumably clay lenses cause rapid lateral variations in the grain size and the resistivity. However, the correspondence between the electrical and lithological divisions is not evident due to the different resolutions of the applied methods. The ERT results suggest that the pattern of heterogeneity shows spatial variation, which requires further research to explain the exact geological causes. The most significant reservoir in the area of the town is the covered sand formation with ~15 m thickness, detected by all applied methods.</p> <p>The results can provide background for planning the appropriate technique of Managed Aquifer Recharge in the town of Kerekegyháza, mitigating further groundwater subsidence. In addition, its application for further cities in the elevated region of the Danube-Tisza Interfluve can contribute to more sustainable management with available water resources.</p> <p><em>The research was funded by the National Multidisciplinary Laboratory for Climate Change, RRF-2.3.1-21-2022-00014 project.</em></p>
Bookmarks Related papers MentionsView impact
Proceedings, Oct 5, 2015
Reservoir, heat and fluid should be investigated for the study area during reconnaissance phase o... more Reservoir, heat and fluid should be investigated for the study area during reconnaissance phase of a fluid-based geothermal exploration. Without proper borehole information the determination and evaluation of reservoir, especially heat and fluid are quite complicated. In turn, springs, which are natural discharge points of flow systems, can reflect the subsurface flow and temperature conditions, therefore they can provide information about the groundwater flow pattern and temperature conditions. Namely, characteristics of springs and their areal distribution can be indicative for gravity–driven groundwater flow systems, as well as geothermal potential via their outflowing water volume and temperature. Geothermal potential of the Transdanubian Range, Hungary was examined based on the results of multidimensional data analysis of natural springs. The modifying effect of geological build–up and basin geometry on groundwater flow and heat pattern, with special emphasis of heat accumulation for geothermal utilization, was analyzed by numerical simulations. The geothermal interpretation of the previous studies, statistical data analysis and numerical simulation led to the conclusion that siliciclastic cover is responsible for heat accumulation in carbonates therefore position of unconfined and confined parts is decisive in geothermal heat utilization in carbonates.
Bookmarks Related papers MentionsView impact
Proceedings, May 6, 2015
ABSTRACT The goal of this study was to find correlation between springs, as natural discharge fea... more ABSTRACT The goal of this study was to find correlation between springs, as natural discharge features and their flow systems by numerical simulation in case of thick carbonate regions. The scenario modelling could prove the existence and operation of gravity-driven flow based on two different scenarios. The differences in the effect of the water table, basin geometry and geology caused different flow pattern. The flow is dominantly lateral in the flow domain. The smoothed differences of the water table could cause mainly local but also intermediate flow systems depending on the depth of the basin. The structures did not caused such a significant effect on flow pattern. However the geometry of the basin and the existence of low permeability strata could efficiently restrict the flow. The folded structure in case of a relatively shallower basin modified the flow pattern. In case of a deeper basin and confined situation complex flow patterns could evolve under confining strata. The position of the erosion basin determines the discharge places at the boundary of unconfined and confined system. The effect of temperature is not so sufficient. Those parts of the basin can preserve heat where the low permeability strata limit the effectiveness of gravity-driven flow.
Bookmarks Related papers MentionsView impact
EGU General Assembly Conference Abstracts, Apr 1, 2019
Bookmarks Related papers MentionsView impact
Marine and Petroleum Geology, Dec 1, 2016
Bookmarks Related papers MentionsView impact
EGU General Assembly Conference Abstracts, Apr 1, 2019
Bookmarks Related papers MentionsView impact
EGU General Assembly Conference Abstracts, Apr 1, 2019
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Water, Jul 28, 2020
Bookmarks Related papers MentionsView impact
Water, Mar 7, 2023
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
The theory of regional groundwater flow is sixty years old in 2023, which has made it possible to... more The theory of regional groundwater flow is sixty years old in 2023, which has made it possible to evaluate groundwater flow systems and evolution in sedimentary basins. Recently, the approach has been extended to different environments in the Earth's crust. By applying regional groundwater flow theory, we can solve groundwater issues on a larger scale than for single aquifers. Application of the concept contributes to all practical aspects of groundwater topics, including the UN’s Sustainable Development Goals for water.However, the developed terms related to groundwater flow evaluation need to be more strictly defined and clarified for interpreting complex hydrogeological flow systems. The presentation summarizes the results of discussions among RGFC-IAH board members on this topic and tries to provide some necessary frameworks for the future application of the concept.At regional scales, groundwater flow evaluation should include the concept of aquifer systems. The term artesi...
Bookmarks Related papers MentionsView impact
<p>For recent decades, the groundwater level has been decreasing in the area of the... more <p>For recent decades, the groundwater level has been decreasing in the area of the Danube-Tisza Interfluve, Hungary, mainly due to climate change. The average depth of water table is between 5-7 m in the elevated Interfluve area. The shallow eolian and fluvial aquifers of the region can be used to store water between the surface and water table for later extraction or for ecological benefit. Therefore, Managed Aquifer Recharge (MAR) systems could play an essential role in improving the stored water and the water balance in the Danube-Tisza Interfluve.</p> <p>The aim of the research was to carry out a geophysical survey and a complex data processing in order to analyse the characteristics of near-surface sediments of Kerekegyháza town (Danube-Tisza Interfluve, Hungary) for MAR implementation. For a detailed understanding of the shallow geological environment in Kerekegyháza, we used three main data systems and previous interpretations. Stratigraphic information was collected and examined from (1) hydrogeological reports. In addition, (2) archived vertical electric sounding (VES) measurements were reprocessed. Furthermore, (3) two-dimensional electric resistivity tomography (ERT) was performed. Summarizing the lithological and electric resistivity data, 4 geological sections and a complex 3D data system were compiled.</p> <p>Interpreting the preliminary information, a simplified three-layered (uncovered aquifer – aquitard – covered aquifer) geological model was set up in the pilot area. Based on the stratigraphic information and the electric resistivity values, the geological setting is more heterogeneous than the simplified model. Hence the determined layers are not horizontally continuous, except for the uncovered dry sand or quicksand aquifer with 0-3 m thickness. Below that, presumably clay lenses cause rapid lateral variations in the grain size and the resistivity. However, the correspondence between the electrical and lithological divisions is not evident due to the different resolutions of the applied methods. The ERT results suggest that the pattern of heterogeneity shows spatial variation, which requires further research to explain the exact geological causes. The most significant reservoir in the area of the town is the covered sand formation with ~15 m thickness, detected by all applied methods.</p> <p>The results can provide background for planning the appropriate technique of Managed Aquifer Recharge in the town of Kerekegyháza, mitigating further groundwater subsidence. In addition, its application for further cities in the elevated region of the Danube-Tisza Interfluve can contribute to more sustainable management with available water resources.</p> <p><em>The research was funded by the National Multidisciplinary Laboratory for Climate Change, RRF-2.3.1-21-2022-00014 project.</em></p>
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Journal of Hydrology
Bookmarks Related papers MentionsView impact
EGU General Assembly Conference Abstracts, Apr 1, 2018
Bookmarks Related papers MentionsView impact
Water, 2022
The ‘Dynamic System Approach for Geofluids and their Resources’ was developed to harmonize resear... more The ‘Dynamic System Approach for Geofluids and their Resources’ was developed to harmonize research and the sustainable exploration of geofluids (e.g., groundwater, geothermal and hydrothermal fluids) and the related geo-resources (groundwater, geothermal energy and hydrothermal minerals). The conception is based on the basin-scale groundwater flow systems, which behave as a geologic agent, mobilize, transport and deposit matter and heat, whilst it can be evaluated quantitatively and in a distributed manner. Evaluation of these systems combined, for instance, with numerical, stochastic and isotope methods can jointly manage all types of geofluids, the related resources and the environmental consequences of their exploration and utilization. This paper describes the fundamental concepts of the approach and displays the proposed workflow and guidelines for practical applications such as groundwater vulnerability assessment, managed aquifer recharge, geothermal energy utilization, and ...
Bookmarks Related papers MentionsView impact
Uploads
Papers by Judit Mádl-Szőnyi