气候变化领域集成服务门户(CCPortal): Seepage influence of supra-permafrost groundwater on thermal field of embankment on Qinghai-Tibet Plateau, China

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DOI	10.1016/j.rcar.2023.06.004
	Seepage influence of supra-permafrost groundwater on thermal field of embankment on Qinghai-Tibet Plateau, China
	Chai, Mingtang; Luo, Yuan; Gao, Yu; Ma, Wei; Mu, Yanhu
发表日期	2023
ISSN	2097-1583
EISSN	2949-7302
起始页码	132
结束页码	140
卷号	15 期号:3
英文摘要	As a unique hydro-geological phenomenon in permafrost regions, the seepage of supra-permafrost groundwater will carry a large amount of heat and cause differential settlement in the embankment. This paper presents the results of a field study monitoring the supra-permafrost groundwater levels on both sides of an embankment in permafrost regions. It describes a two-dimensional coupled hydro-thermal model and uses it to analyze the influence of seepage on its temperature field considering climate warming. The results show that seepage exacerbates permafrost thawing and thickens the active layer. The thermal influence on the sunny side of the embankment toe is more significant than that on the shady side, which will cause differential settlement in the embankment. After 50 years of operation, the embankment soil temperature with seepage during freezing is 0.2 degrees C warmer than that without seepage, and the thermal influence diminished with the increase in depth. Additionally, seepage influences the thermal regime in vertical and horizontal directions of the embankment. During freezing seasons, the thaw depth increases, and the horizontal thaw range decreases. During thawing seasons, the thaw range grows both vertically and horizontally.
关键词	Permafrost Embankment Hydro -thermal coupling Thawed inter -layer
英文关键词	EXPRESSWAY EMBANKMENT; ACTIVE LAYER; HEAT; WARM
WOS研究方向	Geography, Physical
WOS记录号	WOS:001089802200001
来源期刊	RESEARCH IN COLD AND ARID REGIONS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283459
作者单位	Ningxia University; Chinese Academy of Sciences; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Chinese Academy of Sciences
推荐引用方式 GB/T 7714	Chai, Mingtang,Luo, Yuan,Gao, Yu,et al. Seepage influence of supra-permafrost groundwater on thermal field of embankment on Qinghai-Tibet Plateau, China[J],2023,15(3).
APA	Chai, Mingtang,Luo, Yuan,Gao, Yu,Ma, Wei,&Mu, Yanhu.(2023).Seepage influence of supra-permafrost groundwater on thermal field of embankment on Qinghai-Tibet Plateau, China.RESEARCH IN COLD AND ARID REGIONS,15(3).
MLA	Chai, Mingtang,et al."Seepage influence of supra-permafrost groundwater on thermal field of embankment on Qinghai-Tibet Plateau, China".RESEARCH IN COLD AND ARID REGIONS 15.3(2023).