Article
Computer Science, Interdisciplinary Applications
Xiangang Jiang, Tao Wen, Ping Li, Zongliang Zhang, Mingxue Wu, Xingrong Liu, Pengshuai Chen
Summary: This paper proposes a prediction model for outburst debris flow that comprehensively considers the erosion effect. The model is verified through numerical and physical experiments, showing its accuracy in predicting the occurrence of outburst debris flow.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Engineering, Geological
Hsiang-Chieh Lee, Hongey Chen, Mei-Chun Lin, Chih-Hsin Chang, Ming-Jen Chuang, Hsiao-Yuan Yin
Summary: Ex-post benefit-cost assessment method was developed in this study to quantify the direct impact of remediation engineering measures for debris flows. Results from applying this methodology in southern Taiwan showed a range of benefit and cost ratio between 1.26 and 7.99, recommending its use for rapid screening of districts with low benefit-cost ratios.
ENGINEERING GEOLOGY
(2021)
Article
Engineering, Geological
Yan Li, Wei Hu, Janusz Wasowski, Yangshuai Zheng, Mauri McSaveney
Summary: Underestimating local scouring in loose cohesionless landslide deposits may lead to rapid and episodic failure of hazard mitigation structures. The erosion rate can be high and irreversible without artificial intervention once a hydraulic drop is formed, highlighting the importance of proper understanding and engineering solutions in erosion-sensitive deposits.
ENGINEERING GEOLOGY
(2021)
Article
Engineering, Geological
Wuwei Mao, Yuhan Wang, Ping Yang, Yu Huang, Hu Zheng
Summary: In the past decades, surface flows on Earth such as debris flows and rock avalanches have posed a threat to people's safety and infrastructure. However, the combined effects of grain size distribution and environmental factors on engineering structures like the slit dam are still unknown. This study uses a Computational Fluid Dynamics/Discrete Element Method (CFD-DEM) model to investigate the impact of grain size distribution and ambient environments on avalanche/debris flows' interaction with the slit dam.
Article
Engineering, Geological
S. Romeo, D. D'Angio, A. Fraccica, V. Licata, V. Vitale, V. Chiessi, M. Amanti, M. Bonasera
Summary: On the 26th of November 2022, heavy rainfall triggered diffuse landslides in the Northern sector of Ischia. This study investigated the characteristics of a debris flow that occurred in Casamicciola Terme Municipality. The debris flow originated from the Northern slope of Mt. Epomeo and caused significant damage to buildings, resulting in casualties, injuries, displacement, and severe damage to the road network. The study used field investigations, environmental data, and numerical models to assess the event and emphasized the need for careful monitoring and risk management activities in the future.
Article
Engineering, Geological
Xianzheng Zhang, Chenxiao Tang, Ning Li, Jiang Xiong, Ming Chen, Mingwei Li, Chuan Tang
Summary: It is recognized that post-seismic mass movements usually occur in the first few years after an earthquake. However, a major debris flow occurred in Wenchuan County in 2019, 11 years after the 2008 Wenchuan earthquake, indicating a different temporal evolution pattern. The investigation results show that active landslides mainly occurred in high-elevation areas without vegetation cover, and the debris flows were mainly initiated by run-off erosion of debris in steep channels. Additionally, more debris flows occurred in the northern part of the study area, where the relative annual rainfall and coseismic landslide density were low.
Article
Environmental Sciences
Priyom Roy, Tapas R. Martha, Kirti Khanna, Nirmala Jain, K. Vinod Kumar
Summary: This paper presents a novel method for predicting the time and path of landslides using remote sensing data and a new technique. By analyzing ground deformation trends and displacement time series data, the time and flow path of landslides can be predicted. This study is significant for improving the accuracy of landslide early warning in hilly areas.
REMOTE SENSING OF ENVIRONMENT
(2022)
Article
Engineering, Geological
Kun He, Bo Liu, Xiewen Hu, Ruichen Zhou, Chuanjie Xi, Guotao Ma, Mei Han, You Li, Gang Luo
Summary: This paper proposes a rapid disaster information integration and assessment method for characterizing the landslide-debris flow chain in Tiejiangwan, China. The method involves geomorphological mapping, structural characterization, kinematic analysis, and numerical simulation. The results indicate that the first landslide in the area was caused by a combination of structural planes, tectonic activity, terrain and slope structure, with rainfall as the main triggering factor. Loose deposits and gully topography contributed to the occurrence of the secondary debris flow.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Engineering, Geological
Xin Liang, Samuele Segoni, Kunlong Yin, Juan Du, Bo Chai, Veronica Tofani, Nicola Casagli
Summary: This study investigates a landslide disaster in Daoshi Town, China, caused by extreme rainfall and urbanization. The research identifies geological, topographical, and human factors that contributed to the disaster. The study improves the understanding of landslide development in the area and provides basic data and information for further studies and mitigation strategies.
Article
Engineering, Geological
Jian Guo, Jiao Wang, Yao Li, Shujian Yi
Summary: The landslide-induced debris flow in Wangcang County, Sichuan Province on August 14, 2020, resulted in three deaths and two destroyed houses. Factors such as continuous rainfall, interbedded marlstone with structural planes, and changes in slope gradient contributed to the disaster. The study findings may serve as a reference for future research on geohazard chains.
Article
Geosciences, Multidisciplinary
Chu-Ke Meng, Kun-Ting Chen, Zhi-Pan Niu, Bao-Feng Di, Yu-Jian Ye
Summary: This study investigates the influence of the diversity of landslide dam structures on seepage development and breaking processes, finding that saturation and seepage characteristics significantly impact the dam's breaking characteristics. By fitting empirical formulas to time-seepage degree curves, the breaking forms of landslide dams can be predicted before dam breakage. The findings highlight the importance of understanding seepage processes in order to comprehend the breaking mechanism of landslide dams.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Engineering, Geological
L. Gao, L. M. Zhang, H. X. Chen, K. Fei, Y. Hong
Summary: This study examines the factors influencing the travel distances of landslides in Hong Kong, finding a close relationship between horizontal travel distances and fall heights. Furthermore, it is noted that the travel distances of channelized debris flows are significantly enlarged on colluvium lands due to the entrainment of loose materials.
ENGINEERING GEOLOGY
(2021)
Article
Engineering, Geological
Corey Scheip, Karl Wegmann
Summary: Determining how debris flows erode and deposit material is challenging in natural settings. This study uses high-resolution lidar data to evaluate the growth and decay of debris flows triggered by rainfall in Polk County, North Carolina. The analysis reveals three discrete phases of debris flow evolution and identifies a power law relationship between flow distance and the growth rate of debris flow.
Article
Engineering, Geological
Marc Peruzzetto, Clara Levy, Yannick Thiery, Gilles Grandjean, Anne Mangeney, Anne-Marie Lejeune, Aude Nachbaur, Yoann Legendre, Benoit Vittecoq, Jean-Marie Saurel, Valerie Clouard, Thomas Dewez, Fabrice R. Fontaine, Martin Mergili, Sophie Lagarde, Jean-Christophe Komorowski, Arnaud Lemarchand, Anne Le Friant
Summary: High discharge debris flows in mountainous and volcanic areas pose significant threats to populations and infrastructures. Modeling these events is challenging due to their complexity and lack of data. This study successfully models a rock avalanche and subsequent remobilization of deposits as a high discharge debris flow using field data and realistic simulation scenarios. The results are consistent with observed data.
ENGINEERING GEOLOGY
(2022)
Article
Geography, Physical
Tsuyoshi Hattanji, Ryuya Kodama, Daichi Takahashi, Yasushi Tanaka, Shoji Doshida, Takahisa Furuichi
Summary: The study found that channel-head migration caused by shallow landslides during storm events can have an impact on debris flows. In the study areas, areas with larger pre-event channel heads are more prone to shallow landslides.
Article
Engineering, Environmental
Li Wang, Yushan Chen, Shimei Wang, Fei Guo
Summary: This study investigates the deformation mechanism of the Tanjiawan landslide in the Three Gorges Reservoir Area (TGRA) by analysing various types of monitoring data. The landslide has experienced significant deformation since 2014, with severe deformation and appeared tension cracks caused by subsequent rainfall events. The active and secondary deformation zones are defined by the slope structure and rainfall. The surface displacement of the landslide is step-like, controlled by rainfall. The deformation of the landslide leads to cracks and dominant seepage channels, with increased groundwater level and hydrodynamic pressure activating the deformation. Seismic data and soil moisture content change rate can be used for reliable early warnings of landslide instability.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Engineering, Environmental
Qinghua Zhan, Shimei Wang, Fei Guo, Yong Chen, Li Wang, Daipeng Zhao
Summary: An early warning system plays an important role in reducing the damage caused by landslides. In this study, a model test was conducted to investigate the change pattern of hydrological indexes, and a new early warning model based on volumetric moisture content was proposed. This model can provide reliable predictions for slope instabilities triggered under different conditions.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Correction
Engineering, Environmental
Li Wang, Yushan Chen, Shimei Wang, Fei Guo
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Geosciences, Multidisciplinary
Li Wang, Yushan Chen, Xiaohu Huang, Lun Zhang, Xiaowei Li, Shimei Wang
Summary: The study successfully predicted rainfall-induced landslide displacement using methods such as complementary ensemble empirical mode decomposition and K-means clustering, combined with Grey System theory, PSO-LSSVM, and least square methods. The results showed that the model is reliable and effective in predicting landslide displacement, with a high grey relational degree and low root mean squared error value.
Article
Geosciences, Multidisciplinary
Yushan Chen, Yeming Zhang, Li Wang, Shimei Wang, Dongfang Tian, Lun Zhang
Summary: Compared with terrestrial rock landslides, reservoir rock landslides are more affected by the rise and fall of the reservoir water level, which can result in high-speed debris flows and pose a threat to the safe operation of reservoirs. This study investigated the deformation characteristics and influencing factors of the Tanjiahe reservoir rock landslide in the Three Gorges Reservoir through field investigations and simulations. The results highlight the importance of water level and rainfall in the deformation of the landslide.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Xudong Hu, Feng Yang, Kaiheng Hu, Miao Ding, Shuang Liu, Li Wei
Summary: In a seismic basin, the connectivity between earthquake-induced landslides and debris-flow channels plays a crucial role in determining the sediment volume transported into debris flows and the magnitude of the debris flows. This study developed a normalized index of sediment connectivity to analyze the evolution of landslide sediment transport capacity. By simulating two debris-flow events, the results showed a good agreement between the simulated and observed debris-flow magnitudes, indicating the suitability of the normalized landslide connectivity index for estimating the movable volume. Additionally, a negative correlation was found between the sediment connectivity index and landslide characteristics, suggesting a decay of spatial connectivity over time and a corresponding reduction in debris-flow magnitude.
Article
Chemistry, Analytical
Chenyuan Wang, Xudong Hu, Kaiheng Hu, Shuang Liu, Wei Zhong
Summary: This study assesses the impact of the Jiuzhaigou earthquake on vegetation using the CASA model, and discusses the characteristics of vegetation response to different earthquake-induced geohazards. The results show that vegetation gradually recovered after the earthquake, with varying degrees of impact depending on the type of geohazard.
Article
Environmental Sciences
Li Wang, Jun-jie Huang, Yong Chen, Shi-mei Wang, Zhi-hong Fan, Fei Guo, Xiao-wei Li
Summary: This study evaluated the treatment effect of rear slope cutting on the Baishuihe landslide by analyzing surface deformation survey data, field monitoring data, and calculating the seepage field, displacement field, and stability coefficient. The results showed that the decrease in reservoir water level caused deformation of the landslide, but the step deformation disappeared after treatment. Although the hydrodynamic pressure caused by the change in reservoir water did not disappear, the overall stability of the landslide greatly improved due to the reduction in sliding force. Slope cutting is an effective treatment for hydrodynamic pressure landslides, and this study provides technical support for the treatment of reservoir landslides.
JOURNAL OF MOUNTAIN SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Qinghua Zhan, Shimei Wang, Li Wang, Daipeng Zhao, Zhihong Fan, Quanlong Li
Summary: Rainfall and reservoir water level changes can lead to landslide deformations by influencing pore water pressures and effective stresses. This study investigates the creep mechanics of unsaturated soils through isotropic compression creep tests. A linear relationship between volumetric strain and logarithmic time was observed under constant net confining pressure or suction, indicating the applicability of the creep formula proposed by Yin and Graham. However, the creep parameters need to consider suction. A creep model for unsaturated materials based on plastic and rheological theories was established, and its reliability was verified through shear and creep tests.
MECHANICS OF MATERIALS
(2023)
Article
Geosciences, Multidisciplinary
Li Wang, Quanlong Li, Yong Chen, Shimei Wang, Xiaowei Li, Zhihong Fan, Yushan Chen
Summary: Wave erosion on soil bank slopes has become severe in the Three Gorges Reservoir area. The research investigates the influence of soil physical parameters on wave erosion bank slopes. Results show that higher dry density and gravel content enhance the erosion resistance of the bank slope. The research provides technical support for erosion prevention in the Three Gorges Reservoir area.
Article
Engineering, Geological
Wang Li, Nan Fang-yun, Wang Shi-mei, Chen Yong, Li Xiao-wei, Fan Zhi-hong, Chen Yu-shan
Summary: Shallow deformation of ancient landslides induced by heavy rainfall is a significant problem in the Three Gorges Reservoir Area in China. This study focused on exploring the infiltration characteristics and shallow deformation mechanism caused by heavy rainfall. Through rainfall infiltration tests and landslide model tests, it was found that rainfall intensity and soil permeability coefficient affect the speed of rainfall infiltration, and that transient saturation zones and closing gas play a crucial role in affecting the infiltration capacity and causing shallow deformation of landslides.
ROCK AND SOIL MECHANICS
(2023)
Article
Engineering, Geological
Chen Yong, Su Jian, Cao Ling, Wang Li, Wang Shi-mei
Summary: The soil-water characteristic curve (SWCC) is an important characterization of the water-holding performance and water-vapor transport law of unsaturated soil. This study explored the influences of soil type and physical state on SWCC using a database of test data from worldwide research. The analysis revealed that the plasticity index and dry density are the two dominant factors influencing the water retention capacity of unsaturated soils.
ROCK AND SOIL MECHANICS
(2022)