Article
Engineering, Geological
Yong Kong, Mingfu Guan
Summary: This study performs hydro-mechanical simulations of slit dams and provides design diagrams to quantitatively link flow properties and design indices. The results show nonlinear correlations between design indices and flow properties, and spillway width affects retention efficiency.
ENGINEERING GEOLOGY
(2023)
Article
Engineering, Geological
Dongri Song, Gordon G. D. Zhou, Xiao Qing Chen, Jie Li, Anli Wang, Peng Peng, Kai Xi Xue
Summary: The study proposes general equations for landslide debris impact and considers various factors influencing fluid flow and the movement of flexible barriers in the models. Comparison between model predictions and experimental results shows good agreement for the vertical jet model, while discrepancies with the momentum jump model mainly stem from inappropriate characterization of unsteady flow properties.
ENGINEERING GEOLOGY
(2021)
Article
Engineering, Geological
Margaret M. Darrow, Victoria A. Nelson, Michael Grilliot, Joseph Wartman, Aaron Jacobs, James F. Baichtal, Cindy Buxton
Summary: In early December 2020, an extreme weather event consisting of an atmospheric river and rain-on-snow caused flooding and mass movement in Haines, Alaska. The event, which was considered a one-in-500-year occurrence, triggered a devastating landslide that resulted in casualties and property damage. The study highlights the importance of identifying pre-existing landslide features and potential source areas for future landslides. With projections of increased similar events in Southeast Alaska due to warmer and wetter winters, the development of an AR scale combined with geological information is recommended for better warning systems.
Article
Environmental Sciences
Radek Tichavsky, Andrea Fabianova, Aristeidis Koutroulis, Vilem Spalovsky
Summary: The eastern Mediterranean, particularly the Helmos Mountains in Greece, is a hotspot for geomorphic hazards. This study conducted dendrogeomorphic research to investigate the occurrence of debris flows and snow avalanches. The findings revealed that the abundance of snow, temperature fluctuations, and rain-to-snow transitions are the key factors influencing geomorphic activity in the study region.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Geosciences, Multidisciplinary
Karel Silhan
Summary: The study compiled a chronology of snow avalanches and debris flows on the southern coast of the Crimean Mountains, distinguishing between these two natural hazard processes using methods like dendrogeomorphic analysis. The research proved highly effective in confirming over 85% of known events and discussing possible triggers for these events.
Article
Geosciences, Multidisciplinary
Chao Kang, Dongxing Ren, Xiaofeng Gao, Chuntan Han, Yuxi Wang
Summary: This paper systematically studies the kinematic characteristics of a rock avalanche and a debris flow triggered by the 2008 Wenchuan earthquake, using a numerical approach. The rock avalanche traveled far and fast, while the erosion of the debris flow mainly occurred after dam failure. The failure of check dams is identified as the main reason for the destructive consequence of the debris flow, providing valuable insights for mitigation project design.
Article
Geosciences, Multidisciplinary
Radek Tichavsky
Summary: Dendrogeomorphology is widely used for dating geomorphic activity using tree-ring records, particularly in forested landscapes affected by natural hazards. However, the climate background in these studies often lacks balance and requires attention and a comprehensive review of the methods and data used. This study reviewed 121 papers analyzing landslide, debris flow, and snow avalanche reconstructions, evaluating the spatial distribution of study sites, uncertainties in data processing, interpretation, and statistical analysis.
EARTH-SCIENCE REVIEWS
(2023)
Article
Nanoscience & Nanotechnology
Yu-Zhen Yin, Yan Lu, Tai-Ping Zhang, Wei-Zhong Han
Summary: High-temperature nanoindentation was used to study the unique dislocation behaviors in a refractory HfNbTiZr high-entropy alloy. An anomalous nanoindentation avalanche occurs once the load exceeds the elastic limit of the alloy. The depth of the plastic zone under indentation is deeper in the sample with avalanches and increases with the testing temperature. A large fraction of mixed dislocations is formed after nanoindentation, rather than the typical screw dislocations found in other refractory metals. The nanoindentation avalanche is caused by the sudden movement of sluggish dislocations, which have low mobility due to local chemical fluctuations and lattice distortions. These findings indicate a weak temperature-dependence of dislocation mobility in body-centered cubic high-entropy alloys.
SCRIPTA MATERIALIA
(2023)
Article
Optics
Liquan Guo, Haijiao Jiang, Qishuai Lu, Jinlong Huang, Yamin Zheng, Yifan Zhang, Yongchen Zhuang, Lei Huang
Summary: The secondary mirror of an optical telescope is affected by ambient temperature, causing temperature-induced distortion on the surface shape. A hybrid ball-hinged secondary mirror assembly (HSMA) is proposed to adapt to a wide range of temperatures. Simulation investigation shows minimal and negligible surface distortions of the secondary mirror over a wide temperature range.
Article
Geosciences, Multidisciplinary
Qian Chen, Dongri Song, Xiaoqing Chen, Wei Zhong
Summary: This study investigates the mechanisms and sources of flow resistance in debris flow through a systematic analysis of field observation data from 93 debris-flow events in Jiangjia Ravine, Yunnan Province, China. It is found that the fluid viscous effect and particle collisions are the main sources of flow resistance in liquefied flows. By incorporating these physical mechanisms into Manning's formula, a modified Manning's coefficient is derived, which provides a more reasonable basis for mobility analysis and risk assessment of debris flow.
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2023)
Article
Engineering, Geological
Yongshuang Zhang, Sanshao Ren, Junbo Bi, Jinqiu Li, Yang Gao, Ruian Wu, You Tian
Summary: This paper studies the formation and evolution process of high-position rockslide deposits using various technical methods and analyzes the potential instability range of the slope top rock mass. The simulation results show that the predicted rockslide-debris avalanche deposits cannot fully reach the gully outlet, with only a small amount of debris or boulders reaching the proposed railway station site.
ENGINEERING GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Renoj J. Thayyen, P. K. Mishra, Sanjay K. Jain, John Mohd Wani, Hemant Singh, Mritunjay K. Singh, Bankim Yadav
Summary: A catastrophic debris flow occurred in the Rishiganga and Dhauliganga rivers in Uttarakhand, India on 7 February 2021, causing significant loss of life and damage to hydropower projects. The disaster was triggered by the detachment of a right lobe of a hanging glacier and resulted in an ice-rock avalanche. The study also identified the role of weather conditions, precipitation, and land surface temperature in the event.
Article
Engineering, Environmental
Wenpei Wang, Yueping Yin, Yunjie Wei, Sainan Zhu, Junfeng Li, Huajun Meng, Ruixin Zhao
Summary: In August 2018, a high-position rockslide avalanche occurred in Da'anshan village, Fangshan district, Beijing, China, causing no casualties due to timely warning detection. The displaced material traveled a horizontal distance of about 260 m with a vertical drop of about 176 m and finally accumulated with a volume of about 24,000 m(3). This study provides a methodological reference for future simulation analysis of similar events.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Geography, Physical
Daniel Germain, Ludwig Stabile-Caille
Summary: The active talus slopes of the northern Gaspe Peninsula have a unique character due to the highly fissile lithology of the rockwalls and the diversity of mass-wasting processes. The regional geology, deglaciation patterns, and evolution towards a cold temperate morphoclimatic regime still influence the geomorphological dynamics of scree slopes today. At a local scale, the orientation of the main coastal valleys affects snow cover and freeze-thaw cycles, which in turn influence the dominant processes on the talus slopes.
EARTH SURFACE PROCESSES AND LANDFORMS
(2023)
Article
Engineering, Geological
Jianting Du, Jiantao Yu, Clarence Edward Choi
Summary: Submarine debris flows pose a threat to offshore development. Existing experimental studies do not accurately simulate actual bed conditions, and recent experiments have shown that bed roughness and permeability play an important role in flow dynamics.
Article
Geosciences, Multidisciplinary
Valentin Gueugneau, Karim Kelfoun, Timothy Druitt
BULLETIN OF VOLCANOLOGY
(2019)
Article
Geochemistry & Geophysics
Timothy H. Druitt, David M. Pyle, Tamsin A. Mather
Article
Geochemistry & Geophysics
Georges E. Vougioukalakis, Christopher S. Satow, Timothy H. Druitt
Article
Geosciences, Multidisciplinary
Israel Ramirez-Uribe, Claus Siebe, Sergio Salinas, Marie-Noelle Guilbaud, Paul Layer, Jeff Benowitz
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2019)
Article
Geography, Physical
Corentin Chedeville, Marie-Noelle Guilbaud, Claus Siebe
Article
Geochemistry & Geophysics
Swetha Venugopal, Severine Moune, Glyn Williams-Jones, Timothy Druitt, Nathalie Vigouroux, Alexander Wilson, James K. Russell
Article
Geochemistry & Geophysics
Marie-Noelle Guilbaud, Claus Siebe, Christine Rasoazanamparany, Elisabeth Widom, Sergio Salinas, Renato Castro Govea
JOURNAL OF PETROLOGY
(2019)
Article
Geography, Physical
Nayeli Perez-Rodriguez, Juan Morales, Marie-Noelle Guilbaud, Avto Goguitchaichvili, Ruben Cejudo-Ruiz, Maria del Sol Hernandez-Bernal
QUATERNARY GEOCHRONOLOGY
(2020)
Review
Geosciences, Multidisciplinary
David Karatson, Tamas Telbisz, Ralf Gertisser, Thomas Strasser, Paraskevi Nomikou, Timothy Druitt, Viktor Vereb, Xavier Quidelleur, Szabolcs Kosik
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2020)
Article
Multidisciplinary Sciences
Swetha Venugopal, Federica Schiavi, Severine Moune, Nathalie Bolfan-Casanova, Timothy Druitt, Glyn Williams-Jones
SCIENTIFIC REPORTS
(2020)
Article
Geochemistry & Geophysics
Sara Di Salvo, Riccardo Avanzinelli, Roberto Isaia, Alberto Zanetti, Tim Druitt, Lorella Francalanci
Article
Geosciences, Multidisciplinary
Marie-Noelle Guilbaud, Maria del Pilar Ortega-Larrocea, Silke Cram, Benjamin van Wyk de Vries
Summary: Conservation of geosites plays a crucial role in fostering sustainability and geotourism. Mexico City's Xitle volcano serves as a prime example of how geosites can contribute to environmental preservation, cultural heritage, and sustainable development amidst natural hazards.
Article
Geography, Physical
Marie-Noelle Guilbaud, Jesus Alcala-Reygosa, Irene Schimmelpfennig, Jose Luise Arce
Summary: Despite the challenges in dating young volcanic deposits and landforms, accurate dating is crucial for evaluating hazards and predicting future volcanic activity. In this study, multiple dating techniques were used to verify the age of a significant eruption, and it was found that radiocarbon dating of paleosols and in-situ Cl-36 exposure dating were effective methods.
QUATERNARY GEOCHRONOLOGY
(2022)
Article
Environmental Sciences
Fanni Voros, Benjamin van Wyk de Vries, Marie-Noelle Guilbaud, Tolga Gorum, David Karatson, Balazs Szekely
Summary: Morphometric studies of scoria cones have a long history in research. This study analysed 501 scoria cones of four volcanic fields and found that the slope angles of these cones show a statistically significant decreasing tendency with age in both individual volcanic fields and when combining all age groups.
Article
Geography
Viktor Vereb, Benjamin Van Wyk De Vries, Marie-Noelle Guilbaud, David Karatson
QUAESTIONES GEOGRAPHICAE
(2020)