气候变化领域集成服务门户(CCPortal): Debris flows in the Lushan earthquake area: formation characteristics, rainfall conditions, and evolutionary tendency

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DOI	10.1007/s11069-021-04559-2
	Debris flows in the Lushan earthquake area: formation characteristics, rainfall conditions, and evolutionary tendency
	Guo X.; Chen X.; Song G.; Zhuang J.; Fan J.
发表日期	2021
ISSN	0921030X
起始页码	2663
结束页码	2687
卷号	106 期号:3
英文摘要	Debris flows often occur in the mountainous watersheds of earthquake-affected areas, and in the Lushan earthquake area of southwestern China, they have become a significant hazard. In this study, the influencing factors and spatial distribution of debris flows were analyzed through a review of their occurrence history. Debris flows are mainly distributed in the northwestern part of the study area, which hosts the greatest density of active faults. The debris flows are generally formed by the ‘progressive bulking’ effect in channels, and deep incision, lateral erosion, and blockage breaking are common processes that amplify the magnitude of such debris flows. Rainfall thresholds for different types of debris flow were proposed to explain the spatial differences between debris-flow regions, and the temporal variations of those thresholds highlighted how the rainfall conditions required for the occurrence of debris flows have changed. Natural vegetation recovery, reduction in the availability of solid material, and artificial debris-flow control projects play important roles in raising the threshold of the rainfall conditions required for triggering debris flows. © 2021, The Author(s), under exclusive licence to Springer Nature B.V. part of Springer Nature.
关键词	Debris flows Formation mechanism Lushan earthquake Rainfall thresholds Spatial distribution
英文关键词	debris flow; Lushan earthquake 2013; precipitation intensity; slope dynamics; spatiotemporal analysis; watershed
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/206256
作者单位	Key Laboratory of Mountain Hazards and Surface Process, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, 100101, China; School of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621020, China; Sichuan Institute of Geological Engineering Investigation Group Co. LTD, Chengdu, 610032, China; School of Geological Engineering and Surveying, Changan University, Xi’an, 710064, China; Sichuan Provincial Meteorological Observatory, Chengdu, 610072, China
推荐引用方式 GB/T 7714	Guo X.,Chen X.,Song G.,et al. Debris flows in the Lushan earthquake area: formation characteristics, rainfall conditions, and evolutionary tendency[J],2021,106(3).
APA	Guo X.,Chen X.,Song G.,Zhuang J.,&Fan J..(2021).Debris flows in the Lushan earthquake area: formation characteristics, rainfall conditions, and evolutionary tendency.Natural Hazards,106(3).
MLA	Guo X.,et al."Debris flows in the Lushan earthquake area: formation characteristics, rainfall conditions, and evolutionary tendency".Natural Hazards 106.3(2021).