气候变化领域集成服务门户(CCPortal): Risk Zoning of Permafrost Thaw Settlement in the Qinghai-Tibet Engineering Corridor

CCPortal

DOI	10.3390/rs15153913
	Risk Zoning of Permafrost Thaw Settlement in the Qinghai-Tibet Engineering Corridor
	Liu, Zhiyun; Zhu, Yu; Chen, Jianbing; Cui, Fuqing; Zhu, Wu; Liu, Jine; Yu, Hui
发表日期	2023
EISSN	2072-4292
卷号	15 期号:15
英文摘要	The Qinghai-Tibet Plateau is the highest and largest permafrost area in the middle and low latitudes of China. In this region, permafrost thaw settlement is the main form of expressway subgrade disaster. Therefore, the quantitative analysis and regionalization study of permafrost thaw settlement deformation are of great significance for expressway construction and maintenance in the Qinghai-Tibet region. This paper establishes a thaw settlement prediction model using the thaw settlement coefficient and thaw depth. The thaw depth was predicted by the mean annual ground temperatures and active-layer thicknesses using the Radial Basis Function (RBF) neural network model, and the thaw settlement coefficient was determined according to the type of ice content. Further, the distribution characteristics of thaw settlement risk of the permafrost subgrade in the study region were mapped and analyzed. The results showed that the thaw settlement risk was able to be divided into four risk levels, namely significant risk, high risk, medium risk and low risk levels, with the areas of these four risk levels covering 3868.67 km(2), 1594.21 km(2), 2456.10 km(2) and 558.78 km(2), respectively, of the total study region. The significant risk level had the highest proportion among all the risk levels and was mainly distributed across the Chumar River Basin, Beiluhe River Basin and Gaerqu River Basin regions. Moreover, ice content was found to be the main factor affecting thaw settlement, with thaw settlement found to increase as the ice content increased.
关键词	Qinghai-Tibet engineering corridor permafrost subgrade thaw settlement risk characteristics RBF neural network
英文关键词	ACTIVE LAYER; EMBANKMENT; REGION; TEMPERATURE; SUBGRADE; RAILWAY
WOS研究方向	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:001045543800001
来源期刊	REMOTE SENSING
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282645
作者单位	Chang'an University
推荐引用方式 GB/T 7714	Liu, Zhiyun,Zhu, Yu,Chen, Jianbing,et al. Risk Zoning of Permafrost Thaw Settlement in the Qinghai-Tibet Engineering Corridor[J],2023,15(15).
APA	Liu, Zhiyun.,Zhu, Yu.,Chen, Jianbing.,Cui, Fuqing.,Zhu, Wu.,...&Yu, Hui.(2023).Risk Zoning of Permafrost Thaw Settlement in the Qinghai-Tibet Engineering Corridor.REMOTE SENSING,15(15).
MLA	Liu, Zhiyun,et al."Risk Zoning of Permafrost Thaw Settlement in the Qinghai-Tibet Engineering Corridor".REMOTE SENSING 15.15(2023).