Thomas Hermans
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View article: A geological and geophysical database for the assessment of offshore freshened groundwater resources
A geological and geophysical database for the assessment of offshore freshened groundwater resources Open
Fresh groundwater resources in coastal regions are vital for modern society, but are under considerable pressure due to population growth, seasonal peaks in demand, pollution and climate change. In recent years, interest in offshore freshe…
View article: Estimation of Groundwater Recharge in the Volcanic Aquifers in a Tropical Climate, Southwestern Ethiopia: Insights from Water Table Fluctuation and Chloride Mass Balance Methods
Estimation of Groundwater Recharge in the Volcanic Aquifers in a Tropical Climate, Southwestern Ethiopia: Insights from Water Table Fluctuation and Chloride Mass Balance Methods Open
The sustainable use and management of groundwater resources is a challenging issue due to population growth and climate change. Accurate quantification of groundwater recharge is a basic requirement for effective groundwater resource manag…
View article: Impact of the Tigray War on Water Infrastructures and Essential Hydrosystems in Selected Battle Corridors
Impact of the Tigray War on Water Infrastructures and Essential Hydrosystems in Selected Battle Corridors Open
Armed conflicts continue to severely impact human populations and essential infrastructure, particularly water supply systems. This study examines the Yechilla area, a high-intensity battle corridor during the Tigray (between 12°15′26″ 14°…
View article: Enhanced Markov-Type Categorical Prediction with Geophysical Soft Constraints for Hydrostratigraphic Modeling
Enhanced Markov-Type Categorical Prediction with Geophysical Soft Constraints for Hydrostratigraphic Modeling Open
Accurately characterizing hydrostratigraphic structures is essential for reliable groundwater flow and transport modeling. Due to limited borehole coverage and geological complexity, uncertainty analysis plays a vital role in supporting ro…
View article: Towards Sustainability in Dry land Oases: Water Challenges and Quality
Towards Sustainability in Dry land Oases: Water Challenges and Quality Open
Drâa river basin (DRB) is a large arid area encompassing most important oases in the southern Morocco. Climate change, population growth and recently intensive agriculture activity have led to the overexploitation of limited groundwater re…
View article: Simultaneous spectral induced polarization and X-ray µCT imaging to investigate pore-scale dynamics and geoelectrical responses in porous media
Simultaneous spectral induced polarization and X-ray µCT imaging to investigate pore-scale dynamics and geoelectrical responses in porous media Open
Understanding the interplay between pore-scale fluid distribution and bulk electrical properties is critical to improving petrophysical models of partially saturated porous media. This study introduces and evaluates a novel experimental se…
View article: Field evidence for non-linear IP effects in a volcanic hydrothermal system using reciprocal data.
Field evidence for non-linear IP effects in a volcanic hydrothermal system using reciprocal data. Open
In electrical geophysical methods it is often assumed that the resistivity or chargeability, behaves linearly with the applied electrical current. However, non-linearity has been reported in Induced Polarization (IP) and can be caused by o…
View article: Stochastic inversion of transient electromagnetic data to derive aquifer geometry and associated uncertainties
Stochastic inversion of transient electromagnetic data to derive aquifer geometry and associated uncertainties Open
SUMMARY Understanding processes in the Critical Zone requires reliable information about the vadose-zone aquifer, its geometry, and spatial variability. Commonly, such information is obtained from boreholes, yet large areas might render th…
View article: Unsupervised data selection for focused time-lapse inversion in electrical resistivity tomography monitoring
Unsupervised data selection for focused time-lapse inversion in electrical resistivity tomography monitoring Open
Time-lapse electrical resistivity tomography (TLERT) is a popular technique to monitor subsurface processes. Inversions and interpretation often remain challenging because of noisy data and the superposition of several processes influencin…
View article: Subsurface hydrothermal alteration mapping in the Reykjanes Geothermal area using a combined geoelectrical approach.
Subsurface hydrothermal alteration mapping in the Reykjanes Geothermal area using a combined geoelectrical approach. Open
The dynamic behavior of volcanic hydrothermal systems (VHS) and associated hydrothermal eruptions remains largely unknown, processes in VHS such as the circulation of hydrothermal fluids and formation of caprock give rise to a range of geo…
View article: Decision-making under uncertainty for shallow geothermal systems in complex subsurface settings: application to a low-transmissivity aquifer
Decision-making under uncertainty for shallow geothermal systems in complex subsurface settings: application to a low-transmissivity aquifer Open
Excess thermal energy can be stored in the subsurface and recovered when needed to heat and cool buildings sustainably. Aquifer thermal energy storage systems (ATES) are gaining popularity worldwide. Most operational systems are located in…
View article: Advances in agrogeophysics: geophysical monitoring of the fresh–saline water interface in an agricultural field in the Belgian polders
Advances in agrogeophysics: geophysical monitoring of the fresh–saline water interface in an agricultural field in the Belgian polders Open
Polders are coastal low-lying areas reclaimed on the sea mainly for agriculture. They are constantly drained by pumps, ditches and subsurface drains. In West-Flanders, Belgium they are composed of a shallow freshwater lens on top of denser…
View article: A Novel Experimental Set-up for Simultaneous Acquisitions of Spectral Induced Polarization and X-ray µCT Data in 3D Porous Media
A Novel Experimental Set-up for Simultaneous Acquisitions of Spectral Induced Polarization and X-ray µCT Data in 3D Porous Media Open
Understanding multi-phase pore-scale dynamics and their impact on bulk electrical properties is essential when monitoring reactive flow and transport processes  in many applications. This study introduces a novel experimental setup co…
View article: Improved 3D Geological Modelling with Geophysical Data and Markov-Type Categorical Prediction
Improved 3D Geological Modelling with Geophysical Data and Markov-Type Categorical Prediction Open
Airborne electromagnetics (AEM) is a key tool for 3D subsurface imaging, enabling fast, efficient collection of large datasets for hydrogeological studies (Deleersnyder et al., 2023; Madsen et al., 2022). Combined with geostatistical model…
View article: Interdisciplinary Pathways for Sustainable Management of Geological Resources: A Case Study in Flanders
Interdisciplinary Pathways for Sustainable Management of Geological Resources: A Case Study in Flanders Open
The subsurface is often overlooked in the field sustainable natural resources management, even though it provides us with supporting, provisioning, regulating and cultural geosystem services. Additionally, the subsurface can contribute to …
View article: Aquifer Thermal Energy Storage within a groundwater protection area: Possible interactions between competing subsurface activities
Aquifer Thermal Energy Storage within a groundwater protection area: Possible interactions between competing subsurface activities Open
This study investigates the interaction between groundwater extraction and Aquifer Thermal Energy Storage (ATES) systems, aiming to optimize subsurface resource use sustainably. As demands on the subsurface grow, energy storage and groundw…
View article: Quantifying Groundwater Contaminant Source Uncertainty in Fracture Networks Combining Falsification and Bayesian Evidential Learning
Quantifying Groundwater Contaminant Source Uncertainty in Fracture Networks Combining Falsification and Bayesian Evidential Learning Open
Identifying contaminant sources is crucial for managing groundwater contamination, particularly in complex fracture networks. Traditional methods for source identification often face limitations such as sensitivity to data perturbations, r…
View article: Efficiency and heat transport processes of low-temperature aquifer thermal energy storage systems: new insights from global sensitivity analyses
Efficiency and heat transport processes of low-temperature aquifer thermal energy storage systems: new insights from global sensitivity analyses Open
Aquifer thermal energy storage (ATES) has great potential to mitigate CO 2 emissions associated with the heating and cooling of buildings and offers wide applicability. Thick productive aquifer layers have been targeted first, as these are…
View article: Quantitative imaging of the fresh/saltwater interface with airborne electromagnetics: examining different sources of uncertainty
Quantitative imaging of the fresh/saltwater interface with airborne electromagnetics: examining different sources of uncertainty Open
Knowing the distribution between fresh and saline groundwater is imperative for sustainable and integrated management of water resources in coastal areas. The airborne electromagnetic (AEM) method is increasingly used for hydrogeological m…
View article: Efficiency and heat transport processes of low-temperature aquifer thermal energy storage systems: new insights from global sensitivity analyses
Efficiency and heat transport processes of low-temperature aquifer thermal energy storage systems: new insights from global sensitivity analyses Open
Aquifer Thermal Energy Storage (ATES) has great potential to mitigate CO2 emissions associated with the heating and cooling of buildings and offers wide applicability. Thick productive aquifer layers have been targeted first, as these are …
View article: Quantifying Climate Change Variability for the Better Management of Water Resources: The Case of Kobo Valley, Danakil Basin, Ethiopia
Quantifying Climate Change Variability for the Better Management of Water Resources: The Case of Kobo Valley, Danakil Basin, Ethiopia Open
Alterations in the hydrological cycle due to climate change are one of the key threats to the future accessibility of natural resources. This study used 12 GCM climate models from CMIP6 to evaluate future climate change scenarios by applyi…
View article: Towards Sustainability in Dry land Oases: Water Challenges and Quality
Towards Sustainability in Dry land Oases: Water Challenges and Quality Open
Drâa river basin (DRB) is a large arid area encompassing most important oases in the south of Morocco. Climate change, population growth and recently intensive agriculture activity have led to the overexploitation of limited groundwater re…
View article: Thermo-Hydro-Mechanical Modeling of Geothermal Energy Systems in Deep Mines: Uncertainty Quantification and Design Optimization
Thermo-Hydro-Mechanical Modeling of Geothermal Energy Systems in Deep Mines: Uncertainty Quantification and Design Optimization Open
Exploiting geothermal energy using existing deep mining systems streamlines the development of geothermal systems while addressing the cooling needs of deep mines. However, the combined effects of low-temperature and high-pressure injectio…