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DOI	10.1016/j.coldregions.2021.103236
	Soil hydrological process and migration mode influenced by the freeze-thaw process in the activity layer of permafrost regions in Qinghai-Tibet Plateau
	Wei, Cao; Yu, Sheng; Jichun, Wu; Yaling, Chou; Erxing, Peng; Leonid, Gagarin
通讯作者	Sheng, Y (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	0165-232X
EISSN	1872-7441
卷号	184
英文摘要	It hasn't yet fully understood the influence of freeze-thaw action on hydrological processes in the active layer of permafrost regions. So this article investigated one permafrost cross-section at the northern slope of Bayan Har Mountains in the Source Area of the Yellow River in Qinghai-Tibet Plateau. According to the data of field monitoring, seasonal variability of soil hydrological processes in the active layer of permafrost regions was studied and simulated by the freeze-thaw module of HYDRUS-1D software. The results show that: 1) The soil moisture and the suprapermafrost water-level are divided into four stages based on the freeze-thaw process. Rainfall infiltration is the main driving force of soil hydrological processes, and the freeze-thaw front are the main limiting factors. 2) The active layer thickness (ALT) is greater on the upslope than that on the downslope due to the influence of terrain slope. It leads to that the change variation of the soil moisture and the suprapermafrost water-level on the upslope is also more gently than that on the downslope. 3) Temperature is the key factor that affects soil hydrologic process of the active layer in permafrost regions. Soil temperature and soil moisture showed a significant exponential linear correlation at different depths. The relationship between soil temperature and suprapermafrost water level shows Boltzmann function relations. 4) Soil moisture has a downward migration trend after a freeze-thaw cycle. It will result in the formation of underground ice near the permafrost table. Driven by the temperature gradient, the unfrozen water in the active layer moves from bottom to top during the freezing stage.
英文关键词	Soil hydrological process; Migration mode; Freeze-thaw process; Activity layer of permafrost regions; Qinghai-Tibet Plateau
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
WOS记录号	WOS:000621599800002
来源期刊	COLD REGIONS SCIENCE AND TECHNOLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254417
作者单位	[Wei, Cao; Yu, Sheng; Jichun, Wu; Erxing, Peng; Leonid, Gagarin] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Yaling, Chou] Lanzhou Univ Technol, Key Lab Disaster Prevent & Mitigat Civil Engn Gan, Lanzhou 730000, Peoples R China; [Leonid, Gagarin] Russian Acad Sci, Melnikow Permafrost Inst, Siberian Branch, Yakutsk 677010, Russia
推荐引用方式 GB/T 7714	Wei, Cao,Yu, Sheng,Jichun, Wu,et al. Soil hydrological process and migration mode influenced by the freeze-thaw process in the activity layer of permafrost regions in Qinghai-Tibet Plateau[J]. 中国科学院西北生态环境资源研究院,2021,184.
APA	Wei, Cao,Yu, Sheng,Jichun, Wu,Yaling, Chou,Erxing, Peng,&Leonid, Gagarin.(2021).Soil hydrological process and migration mode influenced by the freeze-thaw process in the activity layer of permafrost regions in Qinghai-Tibet Plateau.COLD REGIONS SCIENCE AND TECHNOLOGY,184.
MLA	Wei, Cao,et al."Soil hydrological process and migration mode influenced by the freeze-thaw process in the activity layer of permafrost regions in Qinghai-Tibet Plateau".COLD REGIONS SCIENCE AND TECHNOLOGY 184(2021).