A catastrophic landslide occurred at Xinmo village in Maoxian County, Sichuan Province,China, on June 24, 2017. A 2.87×106 m3 rock mass collapsed and entrained the surface soil layer along the landslide path. Eig...A catastrophic landslide occurred at Xinmo village in Maoxian County, Sichuan Province,China, on June 24, 2017. A 2.87×106 m3 rock mass collapsed and entrained the surface soil layer along the landslide path. Eighty-three people were killed or went missing and more than 103 houses were destroyed. In this paper, the geological conditions of the landslide are analyzed via field investigation and high-resolution imagery. The dynamic process and runout characteristics of the landslide are numerically analyzed using a depth-integrated continuum method and Mac Cormack-TVD finite difference algorithm.Computational results show that the evaluated area of the danger zone matchs well with the results of field investigation. It is worth noting that soil sprayed by the high-speed blast needs to be taken into account for such kind of large high-locality landslide. The maximum velocity is about 55 m/s, which is consistent with most cases. In addition, the potential danger zone of an unstable block is evaluated. The potential risk area evaluated by the efficient depthintegrated continuum method could play a significant role in disaster prevention and secondary hazard avoidance during rescue operations.展开更多
Dear editor, It is commonly understood that once a strong earthquake takes place, cautions must be taken to the potential secondary disasters in the days that follow [1-4]. The Special Issue of Engineering Geology ent...Dear editor, It is commonly understood that once a strong earthquake takes place, cautions must be taken to the potential secondary disasters in the days that follow [1-4]. The Special Issue of Engineering Geology entitled ＂The Long-Term Geologic Hazards in Areas Struck by Large-Magnitude earthquakes＂ （2014, Volume 182, Part B） covers a large number of case histories. The enhanced landslide and debris-flow activity after the 2008 Wenchuan earthquake in China has given a new example of this phenomenon.展开更多
基金Financial support from National Nature Science Foundation of China (Grant No. 41572303, 41520104002)Chinese Academy of Sciences “Light of West China” Program and Youth Innovation Promotion Association
文摘A catastrophic landslide occurred at Xinmo village in Maoxian County, Sichuan Province,China, on June 24, 2017. A 2.87×106 m3 rock mass collapsed and entrained the surface soil layer along the landslide path. Eighty-three people were killed or went missing and more than 103 houses were destroyed. In this paper, the geological conditions of the landslide are analyzed via field investigation and high-resolution imagery. The dynamic process and runout characteristics of the landslide are numerically analyzed using a depth-integrated continuum method and Mac Cormack-TVD finite difference algorithm.Computational results show that the evaluated area of the danger zone matchs well with the results of field investigation. It is worth noting that soil sprayed by the high-speed blast needs to be taken into account for such kind of large high-locality landslide. The maximum velocity is about 55 m/s, which is consistent with most cases. In addition, the potential danger zone of an unstable block is evaluated. The potential risk area evaluated by the efficient depthintegrated continuum method could play a significant role in disaster prevention and secondary hazard avoidance during rescue operations.
基金supported by the Project on Reconnaissance and Researches by China Geological Survey(Grant No.DD20179609)
文摘Dear editor, It is commonly understood that once a strong earthquake takes place, cautions must be taken to the potential secondary disasters in the days that follow [1-4]. The Special Issue of Engineering Geology entitled ＂The Long-Term Geologic Hazards in Areas Struck by Large-Magnitude earthquakes＂ （2014, Volume 182, Part B） covers a large number of case histories. The enhanced landslide and debris-flow activity after the 2008 Wenchuan earthquake in China has given a new example of this phenomenon.
