气候变化领域集成服务门户(CCPortal): Insights into landslide development and susceptibility in extremely complex alpine geoenvironments along the western Sichuan-Tibet Engineering Corridor, China

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DOI	10.1016/j.catena.2023.107105
	Insights into landslide development and susceptibility in extremely complex alpine geoenvironments along the western Sichuan-Tibet Engineering Corridor, China
	Zhao, Siyuan; Dai, Fuchu; Deng, Jianhui; Wen, Hong; Li, Hua; Chen, Fei
发表日期	2023
ISSN	0341-8162
EISSN	1872-6887
卷号	227
英文摘要	The Sichuan-Tibet Engineering Corridor (STEC), which provides the key function of transportation between the plain and plateau regions, is subjected to widely distributed landslides in the southeastern margins of the Tibetan Plateau. This study investigated the landslides in terms of geomorphological and geological analyses and sus-ceptibility assessment along the western STEC between Changdu and Nyingchi Cities, which is characterized by extremely complex geoenvironments across three major river catchments. The results suggested the spatial feature that the landslides preferentially occurred in river valley regions with high elevation and distinctive local relief. Soft rock types of shale, siltstone, schist and gneiss controlled most landslide areas, while faults and rivers strongly dominated landslide formation. Landslide susceptibility results performed by the support vector ma-chine (SVM), k-nearest neighbor (KNN), and multilayer perception (MLP) models were highly dependent on various sample sets, revealing different hazard-formation backgrounds among the Lancang, Nu, and Yarlung Tsangpo (YLTP) river catchments. A comparative analysis demonstrated the most robust model, the SVM, indicating that lithology, elevation, local relief, slope, and distance to faults were the most significant factors causing landslides. In summary, the investigations signified that the development of landslides along the STEC was macroscopically controlled by regional and vertical zonation of the tectonic geomorphology driven by regional uplift, and was locally dominated by lithology and suture zones. Eventually, further surface erosion and earthquakes dynamically offered inducements for landslide initiation. This study strengthens the understanding of landslide development and susceptibility in response to landscape evolution in southeastern Tibet, and pro-vides a conceptual model for disaster prevention and mitigation in similar high-relief plateau margin regions.
关键词	Southeastern Tibetan Plateau Alpine geomorphology Landslide development Landslide susceptibility assessment Landscape evolution
英文关键词	TSANGPO SUTURE ZONE; THRESHOLD HILLSLOPES; SPATIAL-DISTRIBUTION; WENCHUAN EARTHQUAKE; DADU RIVER; PLATEAU; PREDICTION; COLLISION; INCISION; EROSION
WOS研究方向	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS记录号	WOS:000969163500001
来源期刊	CATENA
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282924
作者单位	Sichuan University; Beijing University of Technology; Xihua University; Chengdu University; Sichuan University
推荐引用方式 GB/T 7714	Zhao, Siyuan,Dai, Fuchu,Deng, Jianhui,et al. Insights into landslide development and susceptibility in extremely complex alpine geoenvironments along the western Sichuan-Tibet Engineering Corridor, China[J],2023,227.
APA	Zhao, Siyuan,Dai, Fuchu,Deng, Jianhui,Wen, Hong,Li, Hua,&Chen, Fei.(2023).Insights into landslide development and susceptibility in extremely complex alpine geoenvironments along the western Sichuan-Tibet Engineering Corridor, China.CATENA,227.
MLA	Zhao, Siyuan,et al."Insights into landslide development and susceptibility in extremely complex alpine geoenvironments along the western Sichuan-Tibet Engineering Corridor, China".CATENA 227(2023).