气候变化领域集成服务门户(CCPortal): Dynamic process of the massive Xinmo landslide, Sichuan (China), from joint seismic signal and morphodynamic analysis

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DOI	10.1007/s10064-018-1360-0
	Dynamic process of the massive Xinmo landslide, Sichuan (China), from joint seismic signal and morphodynamic analysis
	Bai, Xiuqiang; Jian, Jihao; He, Siming; Liu, Wei
通讯作者	He, SM (通讯作者)
发表日期	2019
ISSN	1435-9529
EISSN	1435-9537
起始页码	3269
结束页码	3279
卷号	78 期号:5
英文摘要	On 24 June 2017, a massive high-position landslide occurred at Diexi, Maoxian county, Sichuan, China, destroying the village of Xinmo with over 80 fatalities. Based on field surveys and DEM data before and after the landslide, the run-out of the landslide had a horizontal extent of 2400m and a vertical extent of 1200m and covered an area of about 1.48x10(6)m(2). Based on the pre- and post-landslide profiles, the landslide region can be divided into four zones: source area, erosion area, sliding area, and accumulation area. The volume and area of each zone were calculated from DEM data before and after the landslide. Because of the fragmentation and erosion of the landslide during movement, the landslide volume increased from 2.8x10(6)m(3) to 6.4x10(6)m(3); the fractional amount of volume expansion due to fragmentation (F-F) and entrainment ratio (ER) were 0.033 and 1.23, respectively. The velocity and acceleration of the Xinmo landslide were calculated through the inverted forces from seismic waves. The friction coefficients in each zone of the landslide during movement were also obtained, providing a useful parameter for numerical simulation modeling. An inverse relation was found between the absolute velocity and friction coefficient of each zone, demonstrating the existence of frictional velocity-weakening in massive extensive landslides. Based on frictional velocity-weakening, the steady-state apparent friction (U,sigma) as a function of absolute slip velocity U and normal pressure sigma was also obtained.
关键词	2008 WENCHUAN EARTHQUAKE RUN-OUT SIMULATION MECHANISM ROCKSLIDE MOBILITY DEBRIS DAMS RISK DDA
英文关键词	Xinmo village landslide; Morphodynamic; Seismic signal; Frictional velocity-weakening
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Geological ; Geosciences, Multidisciplinary
WOS记录号	WOS:000471237400016
来源期刊	BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259561
推荐引用方式 GB/T 7714	Bai, Xiuqiang,Jian, Jihao,He, Siming,et al. Dynamic process of the massive Xinmo landslide, Sichuan (China), from joint seismic signal and morphodynamic analysis[J]. 中国科学院青藏高原研究所,2019,78(5).
APA	Bai, Xiuqiang,Jian, Jihao,He, Siming,&Liu, Wei.(2019).Dynamic process of the massive Xinmo landslide, Sichuan (China), from joint seismic signal and morphodynamic analysis.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,78(5).
MLA	Bai, Xiuqiang,et al."Dynamic process of the massive Xinmo landslide, Sichuan (China), from joint seismic signal and morphodynamic analysis".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 78.5(2019).