气候变化领域集成服务门户(CCPortal): The distribution law and coupling factors of debris flows in the G318 Linzhi-Lhasa section of the Sichuan-Tibet traffic corridor

CCPortal

DOI	10.3389/fevo.2023.1166239
	The distribution law and coupling factors of debris flows in the G318 Linzhi-Lhasa section of the Sichuan-Tibet traffic corridor
	He, Na; Song, Yabing; Hu, Guisheng; Yang, Zhiquan; Fu, Qixuan; Gurkalo, Filip
发表日期	2023
ISSN	2296-701X
卷号	11
英文摘要	In recent years, debris flow disasters have occurred frequently along the highway, causing river blockages and road interruptions, which seriously threaten the safety of people's lives and property. Highway G318 is an important throat project linking Sichuan and Tibet; at the same time, it is an important channel for the economic development of Sichuan and Tibet and the transportation of national defense materials. Taking the Linzhi-Lhasa Section of Highway G318 as an example, this study analyses the distribution law and characteristics of coupling factors of debris flows in the study area (under its topographical, hydrometeorological, geological, and structural conditions) using remote sensing interpretation, field surveys, and mathematical statistics. The research shows that: (1) The types and quantity of debris flows in the region show statistical laws under the factors of the slope, slope aspect, drainage area, and gradient of the gully. The vegetation coverage in the upper reaches of the Nyang River valley gradually decreases, and the average debris flow disaster density is 0.529/km, which is the most densely distributed area of debris flow. (2) The distribution density of regional debris flows in narrow valleys is greater than that in wide valleys, and those in the Nyang River basin are greater than those in the Lhasa River basin. (3) By comparing the tectonic geological map and the debris flow distribution map, it was found that the debris flow distribution is controlled by faults, and 71% of the debris flow basins have faults. (4) There is a significant positive correlation between the gradient of the material source area and the gradient of the debris flow gully, as well as a close positive correlation between the rainfall and the fault density, and a close negative correlation between the average gradient and the drainage area. Due to the unique topography and geomorphology of different regions, a difference in meteorology and hydrology occurred. This further affected the topography, geomorphology, and distribution of debris flow disasters. Based on the study of the distribution law of regional debris flow and geological environmental factors, this study provides strong support for regional debris flow prevention and related research.
关键词	debris flow distribution law coupling factors debris flow density fault density
英文关键词	HIGHWAY
WOS研究方向	Ecology
WOS记录号	WOS:001001017700001
来源期刊	FRONTIERS IN ECOLOGY AND EVOLUTION
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283032
作者单位	Chinese Academy of Sciences; Institute of Mountain Hazards & Environment, CAS; Henan Polytechnic University; Kunming University of Science & Technology; Kunming University of Science & Technology; Kunming University of Science & Technology
推荐引用方式 GB/T 7714	He, Na,Song, Yabing,Hu, Guisheng,et al. The distribution law and coupling factors of debris flows in the G318 Linzhi-Lhasa section of the Sichuan-Tibet traffic corridor[J],2023,11.
APA	He, Na,Song, Yabing,Hu, Guisheng,Yang, Zhiquan,Fu, Qixuan,&Gurkalo, Filip.(2023).The distribution law and coupling factors of debris flows in the G318 Linzhi-Lhasa section of the Sichuan-Tibet traffic corridor.FRONTIERS IN ECOLOGY AND EVOLUTION,11.
MLA	He, Na,et al."The distribution law and coupling factors of debris flows in the G318 Linzhi-Lhasa section of the Sichuan-Tibet traffic corridor".FRONTIERS IN ECOLOGY AND EVOLUTION 11(2023).