The August 27, 2014, rock avalanche and related impulse water waves in Fuquan,Guizhou, China |
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| Authors: | Aiguo Xing Qiang Xu Yaoqiang Zhu Jiliang Zhu Yao Jiang |
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| Institution: | 1.State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai,China;2.State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu,China;3.Guizhou Institute of Geo-Environment Monitoring,Guiyang,China;4.Center for Hydrogeology and Environmental Geology Survey,China Geological Survey,Baoding,China;5.Research Center on Landslides, Disaster Prevention Research Institute,Kyoto University,Uji,Japan |
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| Abstract: | At about 8:30 p.m. on 27 August 2014, a catastrophic rock avalanche suddenly occurred in Fuquan, Yunnan, southwestern China. This landslide and related impulse water waves destroyed two villages and killed 23 persons. The impulse waves occurred after initiation of the landslide, caused by the main part of the slide mass rapidly plunging into a water-filled quarry below the source area. The wave, comprising muddy water and rock debris, impacted the opposite slope of the quarry on the western side of the runout path and washed away three homes in Xinwan village. Part of the displaced material traveled a horizontal distance of about 40 m from its source and destroyed the village of Xiaoba. To provide information for potential landslide hazard zonation in this area, a combined landslide–wave simulation was undertaken. A dynamic landslide analysis (DAN-W) model is used to simulate the landslide propagation before entering the quarry, while Fluent (Ansys Inc., USA) is used to simulate the impulse wave generation and propagation. Output data from the DAN-W simulation are used as input parameters for wave modeling, and there is good agreement between the observed and simulated results of the landslide propagation. Notably, the locations affected by recordable waves according to the simulation correspond to those recorded by field investigation. |
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