Article
Engineering, Geological
Lanxin Dai, Xuanmei Fan, Dan Wang, Fanyu Zhang, Ali P. Yunus, Srikrishnan Siva Subramanian, J. David Rogers, Hans-Balder Havenith
Summary: Electrical resistivity tomography was used to study the late Pleistocene Diexi gigantic landslide dam. The high resistivity zones near the periphery and low resistivity zones in the middle of the dam body were found. Field investigation revealed a connection between low resistivity zones and a ditched gully, suggesting that seepage from the gully accelerated the erosion of the dam.
Article
Geochemistry & Geophysics
L. Gross, A. Soueid Ahmed, A. Revil
Summary: The development of new technologies and a better understanding of induced polarization physics have enabled the application of this geophysical method in volcanology and geothermal resources assessment. A new method for directly inverting primary and secondary electric fields at independent stations has been proposed to improve data quality and avoid issues. This approach offers advantages in complex geological settings, large-scale applications, and versatility in different terrains.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Peng Shao, Yanjun Shang, Muhammad Hasan, Xuetao Yi, He Meng
Summary: The study highlights the importance of using geophysical methods (ERT, IP, and SP) for investigating hard rock sites. Geophysical methods have advantages over traditional borehole tests, providing wider area coverage. Integration of different geophysical methods can lead to more accurate interpretations of subsurface structures and groundwater flow.
APPLIED SCIENCES-BASEL
(2021)
Article
Geosciences, Multidisciplinary
Syed Ahatsham Haider, Matloob Hussain, Aamir Ali, Muhammad Faheem Abbasi, Saad Wani
Summary: Landslides can cause significant damage to landscapes, infrastructure, and human lives globally. The Himalayas are particularly vulnerable to landslide hazards due to their active tectonics and diverse climatic conditions. The Danna-Sahotar Landslide in Muzaffarabad, Pakistan, serves as an example of the devastating impact of landslides on infrastructure and settlements. By utilizing unmanned aerial vehicle photogrammetry and electrical resistivity tomography techniques, a comprehensive understanding of the landslide was achieved, highlighting its multiple failure mechanisms and the role of hydrogeology in reducing stability.
Article
Geochemistry & Geophysics
P-A Duvillard, F. Magnin, A. Revil, A. Legay, L. Ravanel, F. Abdulsamad, A. Coperey
Summary: Knowledge of the thermal state of steep alpine rock faces is crucial for assessing geohazards related to permafrost degradation. This study uses a new petrophysical model with electrical conductivity and normalized chargeability data to infer permafrost distribution, finding that only the NW face of the rock ridge is frozen. By modeling bedrock temperature across the ridge and confirming permafrost presence, a low-cost approach to monitoring temperature distribution in Alpine rock walls is provided in response to climate change.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
Sina Saneiyan, Dimitrios Ntarlagiannis, Frederick Colwell
Summary: Soil stabilization processes improve soil engineering properties, with bio-mediated methods offering environmentally friendly alternatives. Spectral induced polarization (SIP) is sensitive to MICP processes and can effectively monitor soil improvement progress, providing valuable information for successful applications.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geosciences, Multidisciplinary
Lige Bai, Zhijun Huo, Zhaofa Zeng, Hui Liu, Jiawei Tan, Tianqi Wang
Summary: Combining time-lapse electrical resistivity (ERT) and self-potential (SP) methods for monitoring groundwater flow provides a direct and reliable approach, with results matching well with in-situ hydrological data.
JOURNAL OF APPLIED GEOPHYSICS
(2021)
Article
Geochemistry & Geophysics
A. Revil, Y. Qi, A. Ghorbani, M. Gresse, D. M. Thomas
Summary: An induced polarization survey was conducted at Kilauea volcano in Hawaii, with data inversion producing a chargeability tomogram for interpreting the low-frequency polarization spectra of volcanic rocks. Results showed a dimensionless ratio of chargeability to conductivity of R = 0.10 +/- 0.02 at Kilauea, indicating control by alteration products of volcanic rocks. Temperature and alteration degree play a key role in controlling normalized chargeability and electrical conductivity, enabling their use as non-intrusive temperature sensors.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
Chak-Hau Michael Tso, Marco Iglesias, Paul Wilkinson, Oliver Kuras, Jonathan Chambers, Andrew Binley
Summary: Electrical resistivity tomography (ERT) is widely used in imaging the Earth's subsurface, but traditional smoothness-constrained inversion may not effectively resolve sharp interfaces. The proposed EM-based framework offers a computationally efficient alternative for estimating resistivity models and uncertainty.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geography, Physical
Julia Luhn, Margherita J. Stumvoll-Schmaltz, Adrian Flores Orozco, Thomas Glade
Summary: In this study, ERT and DPM methods were applied to investigate the Hofermuhle landslide in Lower Austria, aiming to understand the sub-surface conditions and landslide mechanisms. The results showed significant variations near the surface and more stability at deeper layers, presumably with less disturbance. The slip surface was found to be at the bedrock surface, surrounded by highly disturbed clay-rich materials.
Article
Environmental Sciences
Yin-Chun Hung, Tung-Tsan Chen, Tsai-Fu Tsai, Hao-Xi Chen
Summary: Leakage is a serious problem in reservoir operation, affecting impoundment efficiency. The study on Qionglin Reservoir found no serious leakage, but improper development in the catchment area was identified as the main reason for its failure to impound water.
Article
Engineering, Geological
Soumya Darshan Panda, Saurabh Kumar, Sarada Prasad Pradhan, Jaspreet Singh, Abhishek Kralia, Mahesh Thakur
Summary: This study investigates the impact of groundwater table fluctuation on slope instability in the Himalayan region of India. Through a comprehensive approach, the researchers conducted model building, simulation, and field validation to quantify and demonstrate the effect. The findings highlight the importance of groundwater fluctuation modeling in the study of deep-seated landslides.
Article
Geosciences, Multidisciplinary
A. Revil, Y. Qi, S. Barde-Cabusson, M. Gresse
Summary: Induced polarization is utilized to image the feeder dike of a monogenetic dome, revealing pronounced alterations around the magmatic feeding conduit. Through 3D tomography of electrical conductivity and normalized chargeability, the structure of the monogenetic dome is successfully visualized, providing important insights into its formation process.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Yin-Chun Hung, Yu-Xiang Zhao, Wei-Chen Hung
Summary: This study evaluates the feasibility of using Electrical Resistivity Tomography (ERT) to detect and discuss the location, size, and depth of underground tunnels on Kinmen Island. The results show that 2D-ERT can clearly show the tunnel location and shape, and deep learning techniques can enhance the interpretation ability and resolution of the ERT measurement results.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Environmental
Faheem Ullah, Li-Jun Su, Elena S. Kazantseva, Mehtab Alam
Summary: This article discusses the application of electrical resistivity tomography in identifying landslide reactivation hazards. The absence of borehole data and the nonlinearities in subsurface dissimilarities make geological interpretation from field data complex. Performing an electrical resistivity survey proved to be a more cost-effective and safe method for assessing landslide stability compared to drilling multiple boreholes. By comparing field and synthetic data, the study accurately interpreted the final electrical resistivity results and found high subsurface saturated conditions that make existing earthflow debris susceptible to movement. The application of theoretical models in detecting landslide-prone zones in vast areas effectively identifies high-risk regions that may not initially appear different from their surroundings.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Engineering, Geological
K. Sattler, D. Elwood, M. T. Hendry, D. Huntley, J. Holmes, P. B. Wilkinson, J. Chambers, S. Donohue, P. I. Meldrum, R. Macciotta, P. T. Bobrowsky
Summary: The study found that seasonal and multiyear changes in atmospheric factors cause fluctuations in matric suction in the vadose zone, with moisture ingress contributing to increasing landslide displacement rates. Water content in the unsaturated zone is particularly important, especially in semi-arid to arid climates.
Article
Engineering, Geological
J. S. Whiteley, A. Watlet, S. Uhlemann, P. Wilkinson, J. P. Boyd, C. Jordan, J. M. Kendall, J. E. Chambers
Summary: The study demonstrates the rapid construction of a landslide subsurface model by integrating multiple geophysical data sources and utilizing machine learning techniques, showing the feasibility of application in time-critical situations.
ENGINEERING GEOLOGY
(2021)
Article
Engineering, Geological
Jimmy Boyd, Jonathan Chambers, Paul Wilkinson, Maria Peppa, Arnaud Watlet, Matt Kirkham, Lee Jones, Russel Swift, Phil Meldrum, Sebastian Uhlemann, Andrew Binley
Summary: The study presented an approach for processing long-term geoelectrical monitoring data from an active slow-moving landslide, addressing challenges such as sensor array movements and terrain distortions due to slope movements. It utilized digital terrain models acquired by UAV-based photogrammetry or terrestrial laser ranging systems, and applied a baseline constraint within the inversion scheme to effectively model time-series electrical resistivity images incorporating slope movements. The workflow could be adaptable for other studies focused on geophysical/geotechnical monitoring of unstable slopes.
Article
Geosciences, Multidisciplinary
M. H. Loke, P. B. Wilkinson, J. E. Chambers, S. Uhlemann, T. Dijkstra, T. Dahlin
Summary: This study uses the 4-D resistivity smoothness-constrained inversion method to monitor time-lapse resistivity and proposes barrier function and transformation methods to reduce artifacts. The hybrid technique proves to completely eliminate residual artifacts left by the barrier method and produces inversion results closer to the true model.
JOURNAL OF APPLIED GEOPHYSICS
(2022)
Article
Geography, Physical
Simon Blondel, Sebastian Uhlemann, Cornelia Inauen, Arnaud Watlet, Hansruedi Maurer, Colm Jordan, Jonathan Lee, Jonathan Chambers
Summary: This study combines geological fieldwork and geophysical data to investigate the parameters influencing the morphology and behavior of a retreating coastal cliff. The findings contribute to the development of a 3D geological and geophysical model, providing important input for coastal recession and erosion models.
EARTH SURFACE PROCESSES AND LANDFORMS
(2022)
Article
Engineering, Geological
Jessica Holmes, Jonathan Chambers, Paul Wilkinson, Philip Meldrum, Mihai Cimpoiasu, James Boyd, David Huntley, Paul Williamson, David Gunn, Ben Dashwood, Jim Whiteley, Arnaud Watlet, Matthew Kirkham, Kelvin Sattler, David Elwood, Vinayagamoothy Sivakumar, Shane Donohue
Summary: This study focuses on monitoring a landslide in the Thompson River Valley transportation corridor using a novel Electrical Resistivity Tomography (ERT) monitoring system, providing insights into the impact of moisture on slope stability.
ENGINEERING GEOLOGY
(2022)
Review
Geochemistry & Geophysics
Adrien Dimech, LiZhen Cheng, Michel Chouteau, Jonathan Chambers, Sebastian Uhlemann, Paul Wilkinson, Philip Meldrum, Benjamin Mary, Gabriel Fabien-Ouellet, Anne Isabelle
Summary: Mining operations generate large amounts of wastes that require monitoring to manage environmental risks. Time-lapse electrical resistivity tomography (TL-ERT) is a promising non-invasive monitoring technique that provides large-scale subsurface information. The purpose of this review is to understand the current state of research on TL-ERT, create a reference library, and identify future research needs. The review describes the theoretical basis and applications of TL-ERT for mining waste characterization and monitoring. It also discusses potential challenges and future research perspectives.
SURVEYS IN GEOPHYSICS
(2022)
Article
Environmental Sciences
Krisztina Kelevitz, Alessandro Novellino, Arnaud Watlet, James Boyd, James Whiteley, Jonathan Chambers, Colm Jordan, Tim Wright, Andrew Hooper, Juliet Biggs
Summary: This paper presents a case study of using ESA's Sentinel-1 InSAR data to study the behavior and seasonal variations of the Hollin Hill landslide in the UK. The study shows that InSAR data provides valuable information about landslide movement and behavior. The installation of corner reflectors improves the accuracy of InSAR measurements and allows tracking of the most recent landslide movement.
Article
Engineering, Geological
Jessica Holmes, Jonathan Chambers, Paul Wilkinson, Ben Dashwood, David Gunn, Mihai Cimpoiasu, Matthew Kirkham, Sebastian Uhlemann, Philip Meldrum, Oliver Kuras, David Huntley, Simon Abbott, Vinayagamoothy Sivakumar, Shane Donohue
Summary: The instability of slopes, embankments, and cuttings on railway networks is increasingly common worldwide. This study examines the use of a novel near-real-time Electrical Resistivity Tomography (ERT) monitoring system to assess the stability of a railway cutting in Leicestershire, UK. The findings show that seasonal changes in subsurface moisture content and soil suction, exacerbated by the presence of trees, can lead to shrink-swell behavior and reduced shear strength, resulting in instability. It is suggested that grassed slopes are beneficial for stability on slopes with expansive soils.
ENGINEERING GEOLOGY
(2022)
Article
Geochemistry & Geophysics
John Ball, Jonathan Chambers, Paul Wilkinson, Andrew Binley
Summary: Electrical resistivity tomography (ERT) is widely used in monitoring river embankment conditions, but 2D surveys are sensitive to anomalous resistivity features near the survey line, leading to 3D effects. This study found that changing water levels and salinities in tidal environments can cause 3D effects in ERT monitoring. Synthetic modeling showed that these effects are enhanced in brackish waters and with larger electrode spacing. Proper geoelectrical measurement design is crucial to minimize artifacts in ERT data for tidal embankment characterization.
NEAR SURFACE GEOPHYSICS
(2023)
Article
Geosciences, Multidisciplinary
P. B. Wilkinson, J. E. Chambers, P. I. Meldrum, O. Kuras, C. M. Inauen, R. T. Swift, G. Curioni, S. Uhlemann, J. Graham, N. Atherton
Summary: This study tests and compares different methods for regularizing the time-lapse geoelectrical inverse problem, and finds that 4D inversion of the full data set performs the best, while windowed 4D inversion is also applicable in near real-time applications.
FRONTIERS IN EARTH SCIENCE
(2022)
Editorial Material
Geosciences, Multidisciplinary
Christof Kneisel, Sebastian Uhlemann, Jonathan Chambers
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Engineering, Civil
Jim Whiteley, Cornelia Inauen, Paul Wilkinson, Philip Meldrum, Russell Swift, Oliver Kuras, Jonathan Chambers
Summary: Electrical resistivity tomography (ERT) monitoring was used to assess spatiotemporal variation in moisture content on a risk-prone slope above a highway. Results showed complex subsurface moisture dynamics in the partially slipped area as compared to the stable slope. ERT data was used to evaluate the volume of unstable ground and was validated using other data analysis techniques. This study highlights the importance of understanding subsurface processes at the slope-scale for long-term slope management.
TRANSPORTATION GEOTECHNICS
(2023)
Proceedings Paper
Computer Science, Artificial Intelligence
Ferda Ofli, Umair Qazi, Muhammad Imran, Julien Roch, Catherine Pennington, Vanessa Banks, Remy Bossu
Summary: This paper presents an online system that utilizes artificial intelligence techniques to analyze social media data in real time and automatically identify landslide-related information. The system reduces information overload, identifies landslide images, infers geolocation, and categorizes user types. The system has been deployed online and continuously provides time-critical information to partners.
WEB ENGINEERING (ICWE 2022)
(2022)
Article
Geosciences, Multidisciplinary
Jim S. Whiteley, Arnaud Watlet, J. Michael Kendall, Jonathan E. Chambers
Summary: Geophysical imaging plays a crucial role in enhancing the design and monitoring components of local landslide early warning systems. By utilizing laboratory-based petrophysical transforms, geophysical data can contribute to future slope failure forecasting and modeling, integrating with other remote sensing methods and monitoring techniques across different scales. As data acquisition resolutions continue to improve, geophysical monitoring should be considered as a valuable technology for stakeholders implementing LoLEWS.
NATURAL HAZARDS AND EARTH SYSTEM SCIENCES
(2021)
Article
Geography, Physical
A. Securo, C. Del Gobbo, L. Rettig, S. Pillon, A. De Luca, D. Fontana, E. Benedetti Fasil, R. R. Colucci
Summary: Small glaciers in temperate mountain regions have experienced significant reduction and unprecedented melt rates in recent years. Some glaciers have transitioned from clean ice to debris-covered or even rock glaciers. This study examines the surface elevation change of the Popera Alto glacier in the Sesto Dolomites using LiDAR and Structure from Motion surveys, and analyzes its evolution in terms of surface cover and geomorphic processes. The glacier has lost an average of 0.35 m water equivalent per year over the past 16 years, with active modification of its surface cover by geomorphic processes. The role of debris and local topography feedback has allowed the resilience of the glacier, leading to a marked difference between the current environmental equilibrium line altitude (envELA) and the effective ELA (effELA) of the glacier.
Article
Geography, Physical
Zhenzhen Yan, Yaolin Shi, Lili Kang, Xiangtao Fan
Summary: This study proposes a quantitative regional deformation model based on global positioning system (GPS) data to quantitatively analyze the morphological evolution of rivers in the Three Rivers Region. It finds that tectonic deformation phases significantly control regional landscape development and drainage features.
Article
Geography, Physical
Said Mukhtar Ahmad, Nitheshnirmal Sadhasivam, Mona Lisa, Luigi Lombardo, Mustafa Kemal Emil, Amira Zaki, Cees J. Van Westen, Islam Fadel, Hakan Tanyas
Summary: In this study, we investigated a large slow-moving landslide in Northern Pakistan, using Interferometric Synthetic Aperture Radar (InSAR) analysis. Our results showed that the crown of the landslide is moving faster than the surrounding regions, while the footslope experienced high deformations. We discussed the possible roles of meteorologic and anthropogenic factors in causing these deformations.
Article
Geography, Physical
Shuang Bian, Xibin Tan, Yiduo Liu, Suoya Fan, Junfeng Gong, Chao Zhou, Feng Shi, Michael A. Murphy
Summary: The Yarlung River's drainage divide is primarily moving north due to variations in precipitation across the Himalayas. The Gangdese drainage divide shows predominantly northward and southward migration, controlled by base-level rise and downstream influences. The presence of north-trending rifts separates the drainage divides into five zones, each with a distinct migration pattern.
Article
Geography, Physical
Joon-Young Park, Seok Yoon, Deuk-Hwan Lee, Seung-Rae Lee, Hwan-Hui Lim
Summary: This study developed a multiple-regression model to estimate site-specific average growth rates of debris flow events. The proposed model was validated through a case study and showed reasonable predictions of debris flow velocities and heights.
Article
Geography, Physical
Nicholas Reilly Mccarroll, Arnaud Temme
Summary: New geochronological data from hillslope boulder armor in the Flint Hills reveal the rates and timing of lateral retreat in the landscape. Surfaces of limestone boulders dating back to the Pleistocene era were found, and the ages of the hillslope armor increased with distance from the limestone bench. The estimated rate of lateral retreat in this landscape is 0.02 mm/yr.
Article
Geography, Physical
Xinbo Yao, Yuntao Tian
Summary: By studying the Longmenshan-Minshan drainage divide, we found that it has reached a dynamic steady state, indicating a balance between erosion and rock uplift. This study also reveals the process of formation and evolution of the divide and raises questions about the effectiveness of divide migration metrics.
Article
Geography, Physical
Junhui Yu, Pin Yan, Yanlin Wang, Guangjian Zhong, Changliang Chen
Summary: The seafloor mounds in the Chaoshan Depression of the South China Sea are identified as mud volcanoes, with fluids coming from underlying mud-fluid diapirs. The hydrocarbon gases feeding the mud volcanoes and diapirs are reasoned to originate from deep Mesozoic source rocks, indicating significant Mesozoic hydrocarbon potential in the Chaoshan Depression.
Article
Geography, Physical
Marius Huber, Luc Scholtes, Jerome Lave
Summary: This paper investigates the relationships between hillslope stability and fabric anisotropy of brittle rock materials and the implications for landscape shaping. It explores the different stability modes and movement characteristics of anisotropic materials, and demonstrates the significant control of material anisotropy on landscape shaping.
Article
Geography, Physical
Shubhra Sharma, Anil D. Shukla
Summary: The study investigates the relationship between glacial dynamics and lake sedimentation during the mid-Holocene climate variability in the Southern Zanskar ranges. It utilizes geomorphological disposition, elemental geochemistry, and optical chronology of relict lake sediment to reconstruct the pattern of minor glacier responses to climate variability. The results indicate six centennial to millennial-scale climatic phases, with warmer phases represented by decreased mineralogical fine grain flux and increased coarse grain flux. The study highlights the potential of relict lake sediment and para/peri-glacial landforms in understanding glacial dynamics and climate change during the Holocene.
Article
Geography, Physical
Jean-Francois Bernier, Sydney W. Meury, Patrick Lajeunesse
Summary: In this study, an approach combining various data and observation methods was proposed to improve the monitoring of landfast ice dynamics and its geomorphic impact on sedimentary systems. The results demonstrate the ability of the approach to accurately measure interannual variations in landfast ice and constrain geomorphic changes. Additionally, the study found a strong relationship between the severity of freezing seasons and the response of landfast ice to hydrometeorological events, with different geomorphic responses observed under different winter conditions.
Article
Geography, Physical
Heping Shu, Fanyu Zhang
Summary: This study investigates the relationship between susceptibility of soil-water hazards and human activities, geoheritage sites in the Loess Plateau, China. Landslide and gully erosion susceptibility were obtained using gradient boosting and support vector machines, and a hazard matrix was formed to couple landslide and gully erosion susceptibility. The study found different trends in the magnification times of soil-water hazards chain under different scenarios.
Article
Geography, Physical
Guangqiang Qian, Zhuanling Yang, Xuegang Xing, Zhibao Dong, Youyuan Guo
Summary: Granule ripples are aeolian landforms armored against erosion by coarse grains. This study investigates their seasonal morphological evolution and migration in the Sanlongsha Dune Field. The findings show that wind events, especially those exceeding the threshold velocities of coarse grains, significantly influence the morphodynamics of granule ripples. The study highlights the importance of considering the reptation and saltation of coarse grains in future research on granule ripples.