气候变化领域集成服务门户(CCPortal): The Mogangling giant landslide triggered by the 1786 Moxi M 7.75 earthquake, China

CCPortal

DOI	10.1007/s11069-020-04471-1
	The Mogangling giant landslide triggered by the 1786 Moxi M 7.75 earthquake, China
	Zhao B.; Wang Y.; Wu J.; Su L.; Liu J.; Jin G.
发表日期	2021
ISSN	0921030X
起始页码	459
结束页码	485
卷号	106 期号:1
英文摘要	A good understanding of seismic giant landslides could provide favourable guidance for seismic stability evaluation of nearby slopes. Here, an excellent example of a catastrophic seismic landslide named the Mogangling giant landslide (MGL), located upstream along the Dadu River and triggered by the 1786 Moxi M 7.75 earthquake, is analysed for its deposit characteristics, failure mechanism and dammed lake. The MGL, with a volume of approximately 4500 × 104 m3, 450 m long and 1000 m wide, blocked the Dadu River completely and caused over 100 000 deaths when the landslide dam broke. The MGL occurred on the upper part of a narrow granite ridge; a potentially unstable wedge-shaped rock mass was separated from the remaining massif by unloading fissures and an active fault (Detuo fault) that just crossed the slope foot. The Moxi earthquake coupled with strong site amplification triggered the MGL, which blocked the Dadu River; the elevation of the dam crest was approximately 130 m higher than the present river level. The dammed lake had a volume of approximately 9.504 × 108 m3, an area of 19.91 km2 and a length of approximately 31 km; the peak flow of the outburst flood was larger than 7100 m3/s. After hundreds of years of concave bank erosion, the deposit is divided into the right bank deposit (main deposit) and left bank deposit (residual deposit). © 2021, The Author(s), under exclusive licence to Springer Nature B.V. part of Springer Nature.
关键词	1786 Moxi M 7.75 earthquake Dammed lake Failure mechanism Mogangling giant landslide (MGL)
英文关键词	amplification; dam failure; earthquake event; failure mechanism; landslide; seismic hazard; trigger mechanism; China
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206720
作者单位	Key Laboratory of Mountain Hazards and Earth Surface Processes, and Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, China; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, 610059, China; Architecture and Art College, Yiwu Industrial and Commercial College, Yiwu, 322000, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, 100101, China; China-Pakistan Joint Research Center On Earth Sciences, Islamabad, Pakistan; University of Chinese Academy of Sciences, Beijing, 100049, China
推荐引用方式 GB/T 7714	Zhao B.,Wang Y.,Wu J.,et al. The Mogangling giant landslide triggered by the 1786 Moxi M 7.75 earthquake, China[J],2021,106(1).
APA	Zhao B.,Wang Y.,Wu J.,Su L.,Liu J.,&Jin G..(2021).The Mogangling giant landslide triggered by the 1786 Moxi M 7.75 earthquake, China.Natural Hazards,106(1).
MLA	Zhao B.,et al."The Mogangling giant landslide triggered by the 1786 Moxi M 7.75 earthquake, China".Natural Hazards 106.1(2021).