A5018402520- Landslides and related hazards
- Cryospheric studies and observations
- Rock Mechanics and Modeling
- Geotechnical Engineering and Analysis
- Winter Sports Injuries and Performance
- Seismic Imaging and Inversion Techniques
- Geotechnical and Geomechanical Engineering
- Groundwater flow and contamination studies
- Hydraulic Fracturing and Reservoir Analysis
- Climate change and permafrost
- Seismology and Earthquake Studies
- earthquake and tectonic studies
- Tunneling and Rock Mechanics
- Drilling and Well Engineering
- Geophysical Methods and Applications
- Geology and Paleoclimatology Research
- Seismic Waves and Analysis
- Soil and Unsaturated Flow
- Planetary Science and Exploration
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Karst Systems and Hydrogeology
- Grouting, Rheology, and Soil Mechanics
- Image Processing and 3D Reconstruction
- Tree Root and Stability Studies
- Geotechnical Engineering and Underground Structures
ETH Zurich
2015-2024
École Polytechnique Fédérale de Lausanne
2007-2022
GNS Science
2022
Chemnitzer Werkstoffmechanik GmbH (Germany)
2017
Johannes Gutenberg University Mainz
2013
Czech Academy of Sciences, Institute of Geology
1999
Mapping landslides using automated methods is a challenging task, which still largely done human efforts. Today, the availability of high-resolution EO data products increasing exponentially, and one targets to exploit this source for rapid generation landslide inventory. Conventional like pixel-based object-based machine learning strategies have been studied extensively in last decade. In addition, recent advances CNN (convolutional neural network), type deep-learning method, has widely...
Abstract. In this contribution, we present a review of scientific research results that address seismo-hydromechanically coupled processes relevant for the development sustainable heat exchanger in low-permeability crystalline rock and introduce design situ Stimulation Circulation (ISC) experiment at Grimsel Test Site dedicated to studying such under controlled conditions. The shows on reservoir stimulation deep geothermal energy exploitation has been largely based laboratory observations,...
[1] Seismic data analysis is a powerful tool for remote characterization of rock slope failures. Here we develop quantitative estimates fundamental rockslide properties (e.g., volume) based solely on from an existing regional seismic network. We assembled set twenty known rockslides in the central Alps (with volumes between 1,000 and 2,000,000 m3) analyzed their corresponding seismograms. Common signal characteristics include emergent onsets, slowly decaying tails, triangular spectrogram...
Abstract Cycles of glaciation impose mechanical stresses on underlying bedrock as glaciers advance, erode, and retreat. Fracture initiation propagation constitute rock mass damage act preparatory factors for slope failures; however, the mechanics paraglacial remain poorly characterized. Using conceptual numerical models closely based Aletsch Glacier region Switzerland, we explore how in situ stress changes associated with fluctuating ice thickness can drive progressive failure preparing...
We evaluate the dynamic response of large (around five million cubic meters) unstable rock slope at Randa, Switzerland, based on ground-motion recordings during small earthquakes. Seismic measurements revealed strong polarization wavefield in direction maximum displacement with spectral amplification factors ∼5 within area. Results further highlighted resonant frequencies both mass and individual blocks it. Block vibration was confirmed by phase analysis situ from two bounding tension...
Abstract Data from continuously recording permanent seismic networks can contain information about rockslide occurrence and timing complementary to eyewitness observations thus aid in construction of robust event catalogs. However, detecting infrequent signals within large volumes continuous waveform data remains challenging often requires demanding manual intervention. We adapted an automatic classification method using hidden Markov models detect two stations central Switzerland. first...
Abstract A comprehensive worldwide permeability data set has been compiled consisting of 29,000 in situ permeabilities from 221 publications and reports delineating the distribution crystalline rocks into depths 2000 meters below ground surface (mbgs). We analyze influence technical factors (measurement method, scale effects, preferential sampling, hydraulic anisotropy) geological (lithology, current stress regime, seismotectonic activity, long‐term tectonogeological history) on with depth,...
Abstract Rapid mapping of event landslides is crucial to identify the areas affected by damages as well for effective disaster response. Traditionally, such maps are generated with visual interpretation remote sensing imagery (manned/unmanned airborne systems or spaceborne sensors) and/or using pixel-based and object-based methods exploiting data-intensive machine learning algorithms. Recent works have explored use convolutional neural networks (CNN), a deep algorithm, from data. These...
Abstract. The increased interest in subsurface development (e.g., unconventional hydrocarbon, engineered geothermal systems (EGSs), waste disposal) and the associated (triggered or induced) seismicity calls for a better understanding of hydro-seismo-mechanical coupling fractured rock masses. Being able to bridge knowledge gap between laboratory reservoir scales, controllable meso-scale situ experiments are deemed indispensable. In an effort access instrument masses hectometer size, Bedretto...
[1] Thermo-elastic rock slope deformation is often considered to be of relatively minor importance and limited shallow depths subject seasonal warming cooling. In this study, we demonstrate how thermomechanical (TM) effects can drive at greater below the annual thermal active layer. Here in Part 1 two companion papers, present 2D numerical models a simplified surface temperature cycles. The geometry discontinuity sets are loosely based on Randa instability detail 2. Results show that...
Abstract Bedrock stresses induced through exhumation and tectonic processes play a key role in the topographic evolution of alpine valleys. Using finite difference model combining effects tectonics, erosion, long‐term bedrock strength, we assess development near‐surface situ predict behavior response to glacial erosion an Alpine Valley (the Matter Valley, southern Switzerland). Initial are derived from regional history, which is characterized by ongoing transtensional or extensional strain...
[1] Deformation monitoring between 2004 and 2011 at the rock slope instability above Randa (Switzerland) has revealed an intriguing seasonal trend. Relative dislocation rates across active fractures increase when near-surface temperatures drop in fall decrease after snowmelt as rise. This temporal pattern was observed with different systems ground surface depths up to 68 m, represents behavior of entire instability. In this paper, second two companion pieces, we interpret deformation trend...
Crustal stresses beneath evolving alpine landscapes result from a combination of tectonic strain, bedrock exhumation, and topography. The stress field is regulated by elastic material properties the brittle strength critically stressed elements, particularly those within preexisting faults intact rock. Combining Byerlee's law for crustal with recently developed trilinear fracture envelope, we propose an extension crust concept to constrain in situ through microcrack generation extensional...
Abstract Cycles of glaciation alter the temperature field in proximal alpine valley flanks, driving rock slope damage through thermomechanical stresses. Here we extend simplified assumptions glacial debuttressing to quantitatively examine how paraglacial bedrock changes, acting concert with changing ice loads during Late Pleistocene and Holocene cycles, create adjacent slopes prepare future instabilities. When contact temperate glacier ice, walls maintain near isothermal ~0 °C surface...
Abstract This paper presents a detailed analysis of dramatic rock slope acceleration that occurred in fall 2016 at the Moosfluh Landslide, located glacier tongue Great Aletsch Glacier (Switzerland). The was unanticipated and exposed valley bottom an adjacent damned lake to high risk. active deep‐seated gravitational deformation (DSGSD) controlled primarily by deep block‐flexural toppling. In 2013, highly accurate displacement monitoring system developed installed surroundings Glacier,...
<p>Landslide hazard has always been a significant source of economic losses and fatalities in the mountainous regions. Knowledge spatial extent past present landslide activity, compiled form inventory map, is essential for effective risk management. High-resolution data acquired by Earth observation (EO) satellites are often used to map landslides identifying morphological expressions that can be associated with and/or recent deformation. This slow difficult process as it...
Abstract Past exploration missions have revealed that the lunar topography is eroded through mass wasting processes such as rockfalls and other types of landslides, similar to Earth. We analyzed an archive more than 2 million high-resolution images using AI big data-driven approach created first global map 136.610 rockfall events. Using this map, we show primarily driven by impacts impact-induced fracture networks. further identify a large number currently unknown clusters, potentially...
Slope movements of the deep-seated Campo Vallemaggia landslide in southern Swiss Alps have been reported for over 200 years. Surface and borehole investigations unstable mass reveal an up to 300 m deep complex structure incorporating 800 million cubic metres disturbed metamorphic rocks divided into blocks along primary fault zones. An average slide velocity approximately 5 cm/year can be calculated from various monitoring data recorded between 1892 1995. Block primarily involve mechanisms...
We leverage on optical and radar remote sensing data acquired from the European Space Agency (ESA) Sentinels to monitor surface deformation evolution a large very active instability located in Swiss Alps, i.e., Moosfluh rock slope. In late summer 2016, sudden acceleration was reported at this location, with velocity rates passing maximum values of 0.2 cm/day 80 cm/day. A dense pattern uphill-facing scarps tension cracks formed within fall activity started become pronounced. This mass may...