气候变化领域集成服务门户(CCPortal): Investigation of the triggering mechanism and runout characteristics of an earthflow in Zhimei village, Chengduo, Qinghai, China

CCPortal

DOI	10.1007/s11069-021-04861-z
	Investigation of the triggering mechanism and runout characteristics of an earthflow in Zhimei village, Chengduo, Qinghai, China
	Zhang M.; Zhou B.; Cheng Q.; Shen L.; Xing A.; Zhuang Y.
发表日期	2021
ISSN	0921030X
英文摘要	On September 7, 2017, a slope failure occurred in Zhimei village, Chengduo County, Qinghai Province, China. This event involved the failure of 2.4 × 104 m3 of soil from the source area. The displaced mass traveled about 480 m with a vertical distance of approximately 80 m. Based on field investigation and numerical analysis, the failure mechanism and propagation process of Zhimei earthflow were analyzed. The results indicated that seasonal freeze–thaw cycles and sustained rainfall in the rainy season before the slope failure could be the leading causes of slope instability, and a short-term cold snap that coincided with this slope failure may play a secondary role in causing the event. The DAN3D simulation results estimated that the movement process of Zhimei earthflow could last for approximately 800 s with an average displacement rate of 0.6 m/s. A combined Bingham model demonstrated the best performance in reproducing this event. The results in this paper could contribute to drawing some valuable conclusions, which can be used in the future for enhancing the accuracy of hazard assessment for areas with topographical and climatic characteristics similar to those of this case on the Qinghai–Tibet Plateau. © 2021, The Author(s), under exclusive licence to Springer Nature B.V.
关键词	Hydrothermal state Qinghai–Tibet Plateau Runout behavior Triggering mechanism
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/206709
作者单位	State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; Qinghai Provincial Geological Environment Monitoring Station, Xining, 810000, China; Department of Geological Engineering, Southwest Jiaotong University, Chengdu, 610031, China
推荐引用方式 GB/T 7714	Zhang M.,Zhou B.,Cheng Q.,et al. Investigation of the triggering mechanism and runout characteristics of an earthflow in Zhimei village, Chengduo, Qinghai, China[J],2021.
APA	Zhang M.,Zhou B.,Cheng Q.,Shen L.,Xing A.,&Zhuang Y..(2021).Investigation of the triggering mechanism and runout characteristics of an earthflow in Zhimei village, Chengduo, Qinghai, China.Natural Hazards.
MLA	Zhang M.,et al."Investigation of the triggering mechanism and runout characteristics of an earthflow in Zhimei village, Chengduo, Qinghai, China".Natural Hazards (2021).