气候变化领域集成服务门户(CCPortal): Deformation process and kinematic evolution of the large Daxiaowan earthflow in the NE Qinghai-Tibet Plateau

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DOI	10.1016/j.enggeo.2023.107062
	Deformation process and kinematic evolution of the large Daxiaowan earthflow in the NE Qinghai-Tibet Plateau
	Li, Yuanxi; Zhang, Yi; Meng, Xingmin; Su, Xiaojun; Liu, Wangcai; Wang, Aijie; Guo, Fuyun; Liang, Yiwen
发表日期	2023
ISSN	0013-7952
EISSN	1872-6917
卷号	316
英文摘要	Intermittently moving earthflows are widespread geomorphological phenomena in mountainous regions. The Daxiaowan (DXW) earthflow in Zhouqu County, Bailong River Corridor of north-eastern margin of the Qinghai-Tibet Plateau, has been active for over a decade. The earthflow covering has an area of-1.1 km2 and a length of-2.7 km, and it has developed four large secondary landslides and two potential landslides. The slope move-ments pose great threats to the safety of the local residents and the provincial highway S314 at the toe of the DXW. In this study, we used a combination of interferometric synthetic aperture radar technology, unmanned aerial vehicle photogrammetry, geomorphological interpretation, and field investigations to study the defor-mation process and kinematic evolution of the DXW between 2007 and 2020. Field investigations of the earthflow revealed distinct source, transport, and compressional zone with different movement attributes. The displacement time-series results indicated that the deformation process of the DXW earthflow could be divided into two stages: steady deformation with cracks propagation and scarps slumping (during 2007-2016); pro-gressive deformation with surges in the rainy season (during 2017-2020). Rainfall was the primary driver of deformation since 2017. The catchment topography generated by the Pingding-Huama fault has caused flowing water to accumulate on the left side of the catchment, as indicated by the Topographic Wetness Index, leading to the reactivation of DXW. This earthflow was initially reactivated from the middle part of the ancient landslide body, characterized by the gradual development from cracks and scarps to four secondary landslides. Our characterization of the mode of evolution of the DXW earthflow potentially improves our understanding of earthflow movement and landslide hazards in the Bailong River Corridor, and it provides a scientific reference for mitigating disasters risks in this and similar areas.
关键词	Earthflow InSAR Geomorphological interpretation Deformation process Kinematic evolution
英文关键词	INVESTIGATING LANDSLIDES; FLOW; SAR; INTERFEROMETRY; CLASSIFICATION; MOVEMENT; RAINFALL; SYSTEM; CHINA; BASIN
WOS研究方向	Engineering, Geological ; Geosciences, Multidisciplinary
WOS记录号	WOS:000955850800001
来源期刊	ENGINEERING GEOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283204
作者单位	Lanzhou University; Lanzhou University
推荐引用方式 GB/T 7714	Li, Yuanxi,Zhang, Yi,Meng, Xingmin,et al. Deformation process and kinematic evolution of the large Daxiaowan earthflow in the NE Qinghai-Tibet Plateau[J],2023,316.
APA	Li, Yuanxi.,Zhang, Yi.,Meng, Xingmin.,Su, Xiaojun.,Liu, Wangcai.,...&Liang, Yiwen.(2023).Deformation process and kinematic evolution of the large Daxiaowan earthflow in the NE Qinghai-Tibet Plateau.ENGINEERING GEOLOGY,316.
MLA	Li, Yuanxi,et al."Deformation process and kinematic evolution of the large Daxiaowan earthflow in the NE Qinghai-Tibet Plateau".ENGINEERING GEOLOGY 316(2023).