Wouter Deleersnyder
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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: 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: 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: An evaluation of computational methods in electromagnetic geophysics and their potential for groundwater system imaging
An evaluation of computational methods in electromagnetic geophysics and their potential for groundwater system imaging Open
Finding effective methods for locating groundwater resources and ensuring safe drinking water is more crucial than ever, especially in the face of climate change and growing population pressures. Electromagnetic imaging techniques can sign…
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: 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: Joining simplified physics models with coarse grids to speed-up intractable 3D time-domain simulations
Joining simplified physics models with coarse grids to speed-up intractable 3D time-domain simulations Open
Full 3D modelling of time-domain electromagnetic data requires tremendous computational resources. Consequently, simplified physics models prevail in geophysics, using a much faster but approximate (1D) forward model. We propose to join th…
View article: A multidimensional AI-trained correction to the 1D approximate model for Airborne TDEM sensing
A multidimensional AI-trained correction to the 1D approximate model for Airborne TDEM sensing Open
The computational resources required to solve the full 3D inversion of time -domain electromagnetic data are immense. To overcome the time-consuming 3D simulations, we construct a surrogate model, more precisely, a data -driven statistical…
View article: Assessing and Improving the Robustness of Bayesian Evidential Learning in One Dimension for Inverting Time-Domain Electromagnetic Data: Introducing a New Threshold Procedure
Assessing and Improving the Robustness of Bayesian Evidential Learning in One Dimension for Inverting Time-Domain Electromagnetic Data: Introducing a New Threshold Procedure Open
Understanding the subsurface is of prime importance for many geological and hydrogeological applications. Geophysical methods offer an economical alternative for investigating the subsurface compared to costly borehole investigations. Howe…
View article: An efficient workflow for airborne electromagnetic data processing for advanced applications.
An efficient workflow for airborne electromagnetic data processing for advanced applications. Open
Airborne electromagnetics made its first successful entry into mineral exploration applications, mainly by interpreting anomalies in the data. Airborne EM methods will increasingly be used for more advanced large-scale applications, such a…
View article: Geoelectrical and electromagnetic imaging methods applied to groundwater systems: recent advances and future potentials
Geoelectrical and electromagnetic imaging methods applied to groundwater systems: recent advances and future potentials Open
The impacts of climate change, combined with population growth, necessitate practical and effective solutions for locating groundwater resources and ensuring drinking water quality. Our contribution explores recent advances in geoelectrica…
View article: Assessing and improving the robustness of Bayesian evidential learning in one dimension for inverting TDEM data: introducing a new threshold procedure
Assessing and improving the robustness of Bayesian evidential learning in one dimension for inverting TDEM data: introducing a new threshold procedure Open
Understanding the subsurface is of prime importance for many geological and hydro-geological applications. Geophysical methods offer an economical alternative for in-vestigating the subsurface compared to costly borehole investigation meth…
View article: Validation of the Wavelet-Based Deterministic Inversion Ensemble Approach with Markov-Chain Monte Carlo
Validation of the Wavelet-Based Deterministic Inversion Ensemble Approach with Markov-Chain Monte Carlo Open
status: Published
View article: Exploring Interactions between Groundwater Extraction and Shallow Geothermal Energy to Use the Subsurface Optimally and Sustainably
Exploring Interactions between Groundwater Extraction and Shallow Geothermal Energy to Use the Subsurface Optimally and Sustainably Open
status: Published
View article: Integrating Geophysical Inversion with Markov-Type Categorical Prediction for Improved Geological Modelling
Integrating Geophysical Inversion with Markov-Type Categorical Prediction for Improved Geological Modelling Open
status: Published
View article: A multidimensional AI-trained correction to the 1D approximate model for Airborne TDEM sensing
A multidimensional AI-trained correction to the 1D approximate model for Airborne TDEM sensing Open
The computational resources required to solve the full 3D inversion of time-domain electromagnetic data are immense. To overcome the time-consuming 3D simulations, we construct a surrogate model, more precisely, a data-driven statistical m…
View article: Dataset: Multidimensional surrogate modelling for Airborne TDEM data
Dataset: Multidimensional surrogate modelling for Airborne TDEM data Open
DataHF contains the synthetic data for a SkyTEM 304 TDEM system, flying at 40 m height for a two-layered model with an interface at an angle, described in parameters.csv, via 3D simulations. DataLF contains the 1D data (without angle) with…
View article: Dataset: Multidimensional surrogate modelling for Airborne TDEM data
Dataset: Multidimensional surrogate modelling for Airborne TDEM data Open
DataHF contains the synthetic data for a SkyTEM 304 TDEM system, flying at 40 m height for a two-layered model with an interface at an angle, described in parameters.csv, via 3D simulations. DataLF contains the 1D data (without angle) with…
View article: Analyzing the ability of BEL1D for inverting TEM data.
Analyzing the ability of BEL1D for inverting TEM data. Open
Understanding the subsurface is of prime importance for many geological and hydrogeological applications. Geophysical methods offer an economical alternative for investigating the subsurface compared to costly boreholes investigation metho…
View article: Machine learning assisted fast forward 3D modelling for time-domain electromagnetic induction data – lessons from a simplified case
Machine learning assisted fast forward 3D modelling for time-domain electromagnetic induction data – lessons from a simplified case Open
In (time-domain) Electromagnetic Induction (EMI) surveys, an image of the electrical conductivity of the subsurface is obtained non-invasively. An accurate interpretation of the data is computationally expensive as it requires a full (high…
View article: The quantitative meaning of resistivity data in a coastal setting: a Belgian case study
The quantitative meaning of resistivity data in a coastal setting: a Belgian case study Open
In coastal areas, the natural groundwater flow is affected by human activities, such as managed aquifer recharge (MAR) and groundwater extraction. They can induce saltwater intrusion and impact the fresh submarine groundwater discharge (FS…
View article: Flexible quasi-2D inversion of time-domain AEM data, using a wavelet-based complexity measure
Flexible quasi-2D inversion of time-domain AEM data, using a wavelet-based complexity measure Open
SUMMARY Regularization methods improve the stability of ill-posed inverse problems by introducing some a priori characteristics for the solution such as smoothness or sharpness. In this contribution, we propose a multidimensional scale-dep…
View article: Determining the optimal focusing parameter in sparse promoting inversions of EMI surveys
Determining the optimal focusing parameter in sparse promoting inversions of EMI surveys Open
If the magnetic field caused by a magnetic dipole is measured, the electrical conductivity of the subsurface can be determined by solving the inverse problem. For this problem a form of regularisation is required as the forward model is ba…
View article: Novel Airborne EM Image Appraisal Tool for Imperfect Forward Modeling
Novel Airborne EM Image Appraisal Tool for Imperfect Forward Modeling Open
Full 3D inversion of time-domain Airborne ElectroMagnetic (AEM) data requires specialists’ expertise and a tremendous amount of computational resources, not readily available to everyone. Consequently, quasi-2D/3D inversion methods are pre…
View article: Novel Airborne EM Image Appraisal Tool for Imperfect Forward Modelling
Novel Airborne EM Image Appraisal Tool for Imperfect Forward Modelling Open
Full 3D inversion of time-domain Airborne ElectroMagnetic (AEM) data requires specialists' expertise and a tremendous amount of computational resources, not readily available to everyone. Consequently, quasi-2D/3D inversion methods are pre…
View article: Flexible quasi-2D inversion of time-domain AEM data, using a wavelet-based complexity measure
Flexible quasi-2D inversion of time-domain AEM data, using a wavelet-based complexity measure Open
Regularization methods improve the stability of ill-posed inverse problems by introducing some a priori characteristics for the solution such as smoothness or sharpness. In this contribution, we propose a multidimensional, scale-dependent …
View article: Multidimensional forward modelling of EM induction data within a salinization context – is it worth the extra cost?
Multidimensional forward modelling of EM induction data within a salinization context – is it worth the extra cost? Open
<p>In (time-domain) Electromagnetic Induction (EMI) surveys, an image of the electrical conductivity of the subsurface is obtained non-invasively. The electrical conductivity serves as a proxy for salinity via petrophysical laws. The…
View article: Effect of Groundwater Extraction and Artificial Recharge on the Geophysical Footprints of Fresh Submarine Groundwater Discharge in the Western Belgian Coastal Area
Effect of Groundwater Extraction and Artificial Recharge on the Geophysical Footprints of Fresh Submarine Groundwater Discharge in the Western Belgian Coastal Area Open
Human activities, such as managed aquifer recharge (MAR) and groundwater pumping, are influencing the natural groundwater flow in coastal areas. This might induce saltwater intrusion and impact fresh submarine groundwater discharge (FSGD).…