Seasonal freezing-thawing process and hydrothermal characteristics of soil on the Loess Plateau, China

doi:10.1007/s11629-020-6599-9

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	Seasonal freezing-thawing process and hydrothermal characteristics of soil on the Loess Plateau, China
	Chou Ya-ling; Wang Li-jie
	2021-11
发表期刊	JOURNAL OF MOUNTAIN SCIENCE
ISSN	1672-6316
卷号	18 期号:11 页码:3082-3098
摘要	In seasonally frozen soil regions, freezing-thawing action and hydrothermal effect have strong influence on physical and mechanical behavior of shallow soil. A field experiment on the Loess Plateau in Northwest China was carried out to analyze the freezing-thawing process and hydrothermal characteristics of shallow soil considering the climate influence. The results show that the maximum seasonal freezing depth under bare ground surface in this area is from 20 cm to 50 cm. The ground temperature shows a similar changing trend with air temperature, but it has lagged behind the air temperature, and the ground temperature amplitude exponentially decreases with the increase of soil depth. The seasonally frozen soil has experienced four typical stages: unfrozen period, alternate freezing period, freezing period and alternate thawing period. The freezing-thawing process is characterized by unidirectional freezing and bidirectional thawing. The water content of shallow soil is significantly affected by air temperature, evaporation and precipitation, and the soil water content shows a low-high-low changing trend with the increase of depth. The soil temperature and water content interact with each other, and are often coupled. The variation trend of soil moisture with time is consistent with the change trend of the ground temperature with time in each soil layer, and the degree of consistency is higher in the near surface soil than that in the lower layer. Also, the spatial-temporal characteristics of soil moisture and temperature is that the volumetric water content and ground temperature of near surface soil have strong variability, and the range value Ka and coefficient of variation Cv of soil water content and ground temperature in different seasons show a decreasing trend with the increase of depth.
关键词	Seasonally frozen soil Freezing-thawing process Hydrothermal characteristics Loess Plateau
DOI	10.1007/s11629-020-6599-9
收录类别	SCIE
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000710381900006
出版者	SCIENCE PRESS
来源库	WOS
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/150020
专题	土木工程学院法学院
通讯作者	Chou Ya-ling
作者单位	Lanzhou Univ Technol, Key Lab Disaster Prevent & Mitigat Civil Engn, Lanzhou 730050, Peoples R China
第一作者单位	兰州理工大学
通讯作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
推荐引用方式 GB/T 7714	Chou Ya-ling,Wang Li-jie. Seasonal freezing-thawing process and hydrothermal characteristics of soil on the Loess Plateau, China[J]. JOURNAL OF MOUNTAIN SCIENCE,2021,18(11):3082-3098.
APA	Chou Ya-ling,&Wang Li-jie.(2021).Seasonal freezing-thawing process and hydrothermal characteristics of soil on the Loess Plateau, China.JOURNAL OF MOUNTAIN SCIENCE,18(11),3082-3098.
MLA	Chou Ya-ling,et al."Seasonal freezing-thawing process and hydrothermal characteristics of soil on the Loess Plateau, China".JOURNAL OF MOUNTAIN SCIENCE 18.11(2021):3082-3098.

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