Mitja Janža

ORCID: 0000-0002-5471-7096
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About
Contact & Profiles
Research Areas
  • Marine and environmental studies
  • Geothermal Energy Systems and Applications
  • Landslides and related hazards
  • Groundwater flow and contamination studies
  • CO2 Sequestration and Geologic Interactions
  • Hydrology and Watershed Management Studies
  • Groundwater and Isotope Geochemistry
  • Groundwater and Watershed Analysis
  • Geological Formations and Processes Exploration
  • Geochemistry and Geologic Mapping
  • Hydrological Forecasting Using AI
  • Karst Systems and Hydrogeology
  • Reservoir Engineering and Simulation Methods
  • Water Quality Monitoring Technologies
  • Environmental Science and Water Management
  • Geotechnical Engineering and Analysis
  • Geological Modeling and Analysis
  • Flood Risk Assessment and Management
  • Image Processing and 3D Reconstruction
  • Cryospheric studies and observations
  • Forensic Toxicology and Drug Analysis
  • Historical Geography and Cartography
  • Climate variability and models
  • Hydrology and Drought Analysis
  • Underground infrastructure and sustainability

Geological Survey of Slovenia
2015-2025

Abstract. This study introduces a robust methodology for characterizing heterogeneity in alluvial aquifers by integrating borehole data, electrical resistivity tomography (ERT) and stochastic modeling. The approach was tested the Varaždin aquifer to simulate distribution of four hydrofacies identified from data: gravel (G), gravel, sandy clayey (Gsc), sand with silty (Sgcs), clay silt, (CSs). spatial modeled using combination geostatistical tools. Entropy factor analysis reveals lack...

10.5194/egusphere-2025-327 preprint EN cc-by 2025-02-06

This study investigates groundwater flow patterns in a landslide area above the settlement of Koroška Bela NW Slovenia using series tracer tests with sodium chloride (NaCl) and fluorescein (uranine). The experiments, combination pumping continuous observations, reveal two distinct horizons within body: prevailing shallower highly permeable gravel layers slower deep weathered low-permeability clastic layers. Uranine injections suggest longer retentions, indicating complex hydrogeological...

10.3390/app15052707 article EN cc-by Applied Sciences 2025-03-03

Shallow geothermal energy is one of the renewable sources that, when properly utilized, has a minimal impact on environment. The relatively high investment cost installing system can be reduced if local natural conditions are well defined. Knowledge soil properties and understanding heat transfer in environment essential. One way to evaluate thermal perform response test (TRT). main advantage method that it provides actual average conductivity vicinity well, taking into account...

10.5194/egusphere-egu25-17119 preprint EN 2025-03-15

Detecting the mechanism of landslides and evaluating their dynamics is challenging, especially concerning composite landslides. For this purpose, several investigation monitoring techniques should be implemented to obtain reliable information on landslide characteristics (e.g., geological hydrogeological conditions type processes), kinematics (displacement rate), potential triggering mechanisms change in groundwater table precipitation). The Urbas northwest Slovenia has been studied for...

10.3390/rs14143277 article EN cc-by Remote Sensing 2022-07-07

Groundwater represents the most important available freshwater reserves and is of critical importance to global water food security. Old environmental burdens that have led spread contaminants in groundwater limit its use, thus interventions mitigate contamination must often be carried out ensure a safe drinking supply. This study presents optimization well field management designs reduce desethylatrazine (DEA) concentration deep wells Brest Water Works (Central Slovenia). It investigates...

10.1016/j.scitotenv.2021.150811 article EN cc-by The Science of The Total Environment 2021-10-07

The assurance of drinking water supply is one the biggest emerging global challenges, especially in urban areas. In this respect, groundwater and its management environment are gaining importance. This paper presents modeling nitrogen load from leaky sewer system agriculture impact pressure on quality (nitrate concentration) aquifer located beneath City Ljubljana. estimated total model area 58 km2 334 ton/year, 38% arising 62% agriculture. was used as input into solute transport to simulate...

10.3390/w12041171 article EN Water 2020-04-19

10.1007/s12665-009-0406-9 article EN Environmental Earth Sciences 2009-12-18

This study investigated the occurrence and potential sources of residues drugs abuse in an urban aquifer beneath City Ljubljana using water analysis a solute transport model designed to predict nitrogen distribution. Samples were collected from three sources: 28 wastewater samples (24-h composites), 4 aquifer-recharging river (grab), 22 groundwater samples. The analysed for commonly (ab)used licit (nicotine alcohol), medications (morphine, methadone, codeine, ketamine), illicit...

10.1016/j.scitotenv.2023.164364 article EN cc-by-nc The Science of The Total Environment 2023-05-29

Shallow geothermal energy is a renewable source of energy. Using it provides benefits for climate, health and economy. A prerequisite its efficient sustainable use the knowledge potential as well barriers that limit use. The paper presents preliminary results research carried out within GeoPLASMA-CE project assessment shallow in area City Ljubljana. By compiling existing geological data field work, detailed map study was elaborated. spatial distribution thermal conductivity estimated with...

10.5474/geologija.2017.022 article EN cc-by Geologija 2017-12-21

The area above the settlement of Koroška Bela is highly prone to slope mass movements and poses a high risk for safety settlement. To get an insight into hydrogeological conditions processes which can affect in this area, investigations, including mapping, discharge measurements springs, performance infiltrometer slug tests were performed. results these investigations show complex heterogeneous conditions, predisposed by geological tectonic setting active cannot be uniformly described....

10.5474/geologija.2018.013 article EN cc-by Geologija 2018-12-21

Slope stability strongly depends on the prevailing hydrological and hydrogeological conditions. The amount intensity of precipitation changing groundwater levels are important landslide triggering factors. Environmental tracers, including chemical stable isotope compositions groundwater, were used to gain insight into dynamics Urbas landslide. is situated in a mountainous area with steep slopes high poses risk for safety Koroška Bela settlement that lies downstream. analyses oxygen-18 (18O)...

10.3390/w14060912 article EN Water 2022-03-15

Within the framework of »Water Management Plan for Danube River Basin and Adriatic Sea 2015-2021 (NUV II)«, a study on groundwater status karst aquifers which are habitats dependent ecosystems (GDEs) was carried out. Among them olms (Proteus anguinus), endemic species Dinaric karst. These have been included in Slovenian part Natura 2000 network, aims at protecting preserving rare, endangered animal plant habitat types. However, conservation some olm is unfavourable given that number...

10.14720/ns.18.1.35-42 article EN cc-by Natura Sloveniae 2016-06-30

Abstract Land degradation of alluvial plains is an environmental risk for groundwater contamination, stemming from the mobilization contaminants that can occur waste‐filled gravel pits. This be increased by river damming and consequential rises in levels. The presence characteristics former historical land should therefore considered when planning hydroelectric projects. aim this study was to assess hydrological impacts planned Sava River on groundwater, which drinking water source Slovenian...

10.1002/ldr.3168 article EN Land Degradation and Development 2018-09-18

Shallow geothermal energy is a renewable source of that can be used effectively with open loop systems. Knowledge hydrogeological conditions prerequisite for the successful implementation and operation such The article describes risk assessment system related to chemical composition groundwater in area City Ljubljana. Results study show Ljubljansko polje aquifer, geochemical characteristics do not represent possible operational problems an system. On contrary, barje aquifer indicates...

10.5474/geologija.2019.011 article EN cc-by Geologija 2019-12-24

Heterogeneity of the aquifers is one key factors that control transport processes in groundwater. It defined by spatial distribution hydofacies - sediments formed characteristic depositional environments and have typical hydrogeological properties. Due to (in time space) changing sedimetological conditions, hydrofacies nature often complex difficult define. The difficulty this procedure most limits reliability consequently applicability numerical models. For purposes improvement hydrological...

10.5474/geologija.2009.023 article EN Geologija 2009-12-31

Shallow geothermal energy (SGE) is a renewable that could contribute to the decarbonatization of heating and cooling sector. SGE predominantly harnessed through ground source heat pump (GSHP) systems. The choice which type GSHP system depends on various factors. Understanding these factors crucial for optimizing efficiency systems fostering their implementation. In this paper, we have analysed spatial distribution GSHPs in Slovenia. We identified 1073 groundwater 1122 ground-coupled with...

10.3390/resources13030039 article EN cc-by Resources 2024-03-08

To achieve sustainable and efficient use of shallow geothermal resources, it is important to understand the heat transfer in subsurface planned system. In City Municipality Murska Sobota, NE Slovenia, open-loop systems has increased recent years. Their high spatial density raises question potential mutual interference between systems. By compiling geological, hydrogeological, thermal data, obtained from monitoring network, fieldwork, knowledge regional hydrogeological conditions, we have...

10.5194/egusphere-egu24-9213 preprint EN 2024-03-08
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