A5036821893- Geophysical and Geoelectrical Methods
- Geophysical Methods and Applications
- Seismic Waves and Analysis
- Landslides and related hazards
- Climate change and permafrost
- Cryospheric studies and observations
- Seismic Imaging and Inversion Techniques
- Geochemistry and Geologic Mapping
- Geology and Paleoclimatology Research
- NMR spectroscopy and applications
- Earthquake Detection and Analysis
- Mineral Processing and Grinding
- Methane Hydrates and Related Phenomena
- Karst Systems and Hydrogeology
- Groundwater flow and contamination studies
- Soil Moisture and Remote Sensing
- Geological Modeling and Analysis
- Enhanced Oil Recovery Techniques
- Soil erosion and sediment transport
- Geological Formations and Processes Exploration
- Smart Materials for Construction
- Seismology and Earthquake Studies
- Non-Destructive Testing Techniques
- Geological formations and processes
- Hydrocarbon exploration and reservoir analysis
TU Wien
2016-2025
GeoInformation (United Kingdom)
2021-2024
Halliburton (United Kingdom)
2024
University of Vienna
2020-2023
Universidad Nacional Autónoma de México
2020
Technische Universität Braunschweig
2020
University of Bonn
2010-2014
Forschungszentrum Jülich
2012
University of Toronto
2002
ABSTRACT Over the last 15 years significant advancements in induced polarization (IP) research have taken place, particularly with respect to spectral IP (SIP), concerning understanding of mechanisms phenomenon, conduction accurate and broadband laboratory measurements, modelling inversion data for imaging purposes increasing application method near‐surface investigations. We summarize here current state science SIP applications describe which aspects still represent open issues should be...
Changes of rock and ice temperature inside permafrost walls crucially affect their stability. Permafrost rocks at the Zugspitze were involved in a 0.3–0.4 km 3 rockfall 3.7 ka B.P. whose deposits are now inhabited by several thousands people. A 107 year climate record summit (2962 m asl) shows sharp increase 1991–2007. This article applies electrical resistivity tomography (ERT) to gain insight into spatial thaw refreezing behavior presents first approach calibrating ERT with frozen...
[1] Experiments at the Department of Energy's Integrated Field Research Challenge (IFRC) site near Rifle, Colorado, have demonstrated ability to remove uranium from groundwater by stimulating growth and activity Geobacter species through acetate amendment. Prolonging these strains in order optimize bioremediation has prompted development minimally invasive spatially extensive monitoring methods diagnostic their situ end products metabolism. Here we demonstrate use complex resistivity imaging...
Abstract. Hydrological observatories bear a lot of resemblance to the more traditional research catchment concept, but tend differ in providing long-term facilities that transcend lifetime individual projects, are strongly geared towards performing interdisciplinary research, and often designed as networks assist collaborative science. This paper illustrates how experimental monitoring set-up an observatory, 66 ha Open Air Laboratory (HOAL) Petzenkirchen, Lower Austria, has been established...
Abstract. Mountain permafrost is sensitive to climate change and expected gradually degrade in response the ongoing atmospheric warming trend. Long-term monitoring of thermal state a key task, but problematic where temperatures are close 0 ∘C because energy exchange then dominantly related latent heat effects associated with phase (ice–water), rather than ground or cooling. Consequently, it difficult detect significant spatio-temporal variations properties (e.g. ice–water ratio) that occur...
Induced polarization (IP) imaging is being increasingly used in near-surface geophysical studies, particularly for hydrogeologic and environmental applications. However, the analysis of IP data error has received little attention, even though importance an adequate parameterization been demonstrated electrical resistivity imaging. Based on sets measured frequency range from 1 Hz to kHz, we proposed a model quantification phase errors measurements. The analyzed were collected experimental...
ABSTRACT Tomographic measurements of the spectral induced polarization (SIP) response aquifer sediments were conducted at U.S. Department Energy’s (DOE) Integrated Field Research Challenge site (IFRC) in Rifle, Colorado (USA), where biostimulation research is ongoing with purpose to immobilize uranium tailings‐contaminated groundwater. The aims SIP surveys (a) collect data over a sufficiently broad bandwidth so as determine characteristic frequency (at which strongest takes places), (b)...
The injection of microscale zerovalent iron (mZVI) particles for groundwater remediation has received much interest in recent years. However, to date, monitoring mZVI particle is based on chemical analysis and soil samples thus might be limited its spatiotemporal resolution. To overcome this deficiency, study, we investigate the application complex electrical conductivity imaging, a geophysical method, monitor high-pressure field-scale application. resulting images revealed an increase...
ABSTRACT This paper provides an update on the fast‐evolving field of induced polarization method applied to biogeophysics. It emphasizes recent advances in understanding signals stemming from biological materials and their activity, points out new developments applications, identifies existing knowledge gaps. The focus this review is application study living organisms: soil microorganisms plants (both roots stems). We first discuss observed links between signal microbial cell structure,...
Abstract Water‐saturated porous media exhibit a low‐frequency (<1 MHz) dispersion of the electrical conductivity caused by polarization double layer (EDL) coating charged solid‐liquid interface. We develop mathematical framework describing field‐induced perturbations ion densities in Stern and diffuse EDL for two different geometrical configurations solid liquid phase. For spherical grains immersed an electrolyte we derive improved analytical description combining suitable models diffuse‐...
Applications of time-lapse inversion electrical resistivity tomography allow monitoring variations in the subsurface that play a key role variety contexts. The data provides successive images properties showing medium evolution. Image quality is highly dependent on weighting determined from error estimates. However, quantification errors has not yet been addressed. We have developed methodology for based analysis discrepancy between normal and reciprocal readings acquired at different times....
We have developed an extension of the theory and mathematical description commonly used Wong model electrode polarization. The full solution Poisson-Nernst-Planck system is provided, including three additional unknown coefficients, which describe microscale polarization response at surface a perfectly conducting particle. involves two simultaneously acting mechanisms. first related to dynamic charging diffuse layers induced over poles particles, relaxes on time scale proportional particle...
Abstract In floodplain environments, a naturally reduced zone (NRZ) is considered to be common biogeochemical hot spot, having distinct microbial and geochemical characteristics. Although important for understanding their role in mediating processes, mapping the subsurface distribution of NRZs over dimensions challenging, as conventional wellbore data are typically spatially limited heterogeneous. this study, we present an innovative methodology probabilistic within three‐dimensional (3‐D)...
The characterization of contaminated sites is a serious issue that requires number techniques to be deployed in the field reconstruct geometry, hydraulic properties and state contamination shallow subsurface, often at hundreds meter scale with metric resolution. Among have been proposed complement direct investigations (composed drilling, sampling, laboratory characterization) are geophysical methods, which can provide extensive spatial coverage both laterally depth required However, methods...
There is growing interest in the use of spectral induced polarization (SIP) surveys to characterize near-surface environment. Few attempts have been made perform field SIP a 3D configuration; when done, they are typically conducted using series parallel 2D electrode lines with collinear measurements. However, such measurements limited resolution between which critical case heterogeneous subsurface conditions, as landfills. To overcome this, we investigate here enhanced through true...
The spectral induced polarization (SIP) method has emerged as a well-suited laboratory technique to characterize hydrogeologic and biogeochemical parameters in soil samples. However, field applications of the SIP imaging are still rare, which can be attributed particular care required minimize contamination data by electromagnetic coupling. To date, procedures rely on use two different cables separating current potential dipoles improve quality readings, although this increases efforts might...
The disposal of municipal solid waste (MSW) in landfills is the prevalent method management at global scale. However, production landfill gases due to methanogenic fermentation wet MSW a possible threat human health and accounts for substantial contribution greenhouse gas emissions. Accordingly, information regarding water content critical as it an important factor triggering methane landfills. In this study, we propose petrophysical joint inversion scheme quantitatively solve (WC) based on...
Abstract. Degrading permafrost in rock glaciers has been reported from several sites the European Alps. Changes ground temperature and ice content are expected to affect hydrogeological properties of turn modify runoff regime groundwater recharge high-mountain environments. In this study, we investigate use an emerging geophysical method studies understand active Gran Sometta glacier, which consists a two-lobe tongue (a white black) whose lobes differ their geologies. We present application...
The use of open-source processing tools represents a strategic resource for the scientific community. Open Science philosophy (https://www.unesco.org/en/open-science) promotes transparency, reproducibility and accessibility to data source codes. This not only ensures continuous collaborative development, but also increases quality proposed solutions.Characterizing near surface based on geophysical methods is considerable interest many disciplines, reliability provided results tied available...