气候变化领域集成服务门户(CCPortal): A big landslide on the Jinsha River, Tibet, China: geometric characteristics, causes, and future stability

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DOI	10.1007/s11069-020-04261-9
	A big landslide on the Jinsha River, Tibet, China: geometric characteristics, causes, and future stability
	Cui Y.; Bao P.; Xu C.; Fu G.; Jiao Q.; Luo Y.; Shen L.; Xu X.; Liu F.; Lyu Y.; Hu X.; Li T.; Li Y.; Liu Y.; Tian Y.
发表日期	2020
ISSN	0921030X
起始页码	2051
结束页码	2070
卷号	104 期号:3
英文摘要	On October 10, 2018, a big landslide occurred on the right bank of the Jinsha River in Baige Village, Polo Township, Jiangda County, Tibet (hereafter called the Baige landslide), which blocked the Jinsha River, forming a barrier lake. Afterward, the landslide dam broke, producing a flood. On November 3, the rear wall of this landslide failed again, also blocking the Jinsha River and creating a bigger barrier lake. Then, by local people, a discharge channel was excavated on the top of the landslide dam, making lake water cross over the discharge channel. As the water flow gradually increased, the landslide dam broke again, producing a more severe flood, resulting in huge economic losses downstream. The purpose of this study is to understand the cause of this landslide and predict the future stability of its head scarp, providing some support for the control scheme in the later stage. A digital orthophoto map (DOM) and a digital elevation model (DEM) of the landslide were created using an unmanned aerial vehicle. Then based on the DOM and DEM, the geometric characteristics of the landslide were described. Multi-phase Planet 5 images were used to infer the development process of the landslide. Finally, the cause of the landslide was analyzed based on the rainfall data and the limit equilibrium calculation. The results show that the Baige landslide was a self-weight creeping event, and its development and trigger were independent of the rainfall. Before the landslide, the slope experienced five stages of evolution: steady deformation, slow deformation, rapid deformation, steady deformation, and rapid deformation. The limit equilibrium calculation indicates that the stability coefficient of the middle section of the head scarp is the lowest, thus which should be cut down as a priority. This study provides a typical example of a self-weight creep type landslide, and an important reference for prediction and prevention of similar large landslides in the Tibetan Plateau, southwestern China. © 2020, Springer Nature B.V.
关键词	Baige landslide Cause Geometric characteristics Stability Tibetan plateau
英文关键词	digital elevation model; digital map; geometry; landslide; orthophoto; river bank; river channel; river discharge; river flow; stability analysis; China; Jinsha River; Qinghai-Xizang Plateau
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/205640
作者单位	School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan, 232001, China; National Institute of Natural Hazards, Ministry of Emergency Management of China (Former Institute of Crustal Dynamics, China Earthquake Administration), Beijing, 100085, China; Beijing Meteorological Information Center, Beijing Meteorological Service, Beijing, 100089, China
推荐引用方式 GB/T 7714	Cui Y.,Bao P.,Xu C.,et al. A big landslide on the Jinsha River, Tibet, China: geometric characteristics, causes, and future stability[J],2020,104(3).
APA	Cui Y..,Bao P..,Xu C..,Fu G..,Jiao Q..,...&Tian Y..(2020).A big landslide on the Jinsha River, Tibet, China: geometric characteristics, causes, and future stability.Natural Hazards,104(3).
MLA	Cui Y.,et al."A big landslide on the Jinsha River, Tibet, China: geometric characteristics, causes, and future stability".Natural Hazards 104.3(2020).