Mechanisms and Modeling of the Catastrophic Landslide Dam at Jure Village, Nepal
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Volume 147, Issue 11
Abstract
This study clarifies the failure mechanisms of the 2014 catastrophic large deep-seated landslide and simulates the dam formation process at Jure Village, Nepal, through site investigations, ring shear tests, and LS-RAPID computer simulation model. The detailed analyses suggest that the Jure landslide triggered by a high cumulative rainfall slid along bedding-plane faults of weathered phyllite and schist on the slope of an ancient landslide terrain. The landslide comprised two separate subblocks; the upper and lower slopes, whose sliding mechanisms differed from each other. The test results indicate that the upper subblock of the landslide was triggered by rainfall with a critical pore pressure ratio of . The lower slope failure resulted from a dynamic loading process initiated by the downward movement of the upper slope. In the LS-RAPID model, the evolution process of landslide damming the river was reproduced and verified based on the observed geomorphic evidence and recorded data. The study shows landslide mobility acted as the critical factor leading to the landslide dam formation, in addition to the geomorphic indexes.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This research is funded by Vietnam National Foundation for Science and Technology Development (NAFOSTED) under Grant No. 105.08-2019.14. The authors would also like to express our thanks to M.Sc. Uttam Lamshal and Mr. Kiran Dahal (Tribhuvan University in Nepal); Mr. Ishwor Thapa and Mr. Nishant Khanal (Nepal-NSET); M.Sc. Nguyen Khac Hoang Giang (Hanoi University of Natural Resources and Environment); M.Sc. Doan Huy Loi (International Consortium on Landslides); and Dr. Rocky Talchabhadel (Texas A&M University, US) for their valuable discussion and support during this study. The authors sincerely thank the editors and anonymous reviewers for their valuable comments and suggestions that improved the article.
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Journal of Geotechnical and Geoenvironmental Engineering
Volume 147 • Issue 11 • November 2021
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© 2021 American Society of Civil Engineers.
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Received: Jul 6, 2020
Accepted: Jun 10, 2021
Published online: Sep 3, 2021
Published in print: Nov 1, 2021
Discussion open until: Feb 3, 2022
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