干旱区生态环境知识资源中心(Arid): An improved estimation of soil water and salt dynamics by considering soil bulk density changes under freeze/thaw conditions in arid areas with shallow groundwater tables

Arid

DOI	10.1016/j.scitotenv.2022.160342
	An improved estimation of soil water and salt dynamics by considering soil bulk density changes under freeze/thaw conditions in arid areas with shallow groundwater tables
	Liu, Sheng; Huang, Quanzhong; Zhang, Wenxin; Ren, Dongyang; Xu, Xu; Xiong, Yunwu; Huang, Guanhua
通讯作者	Huang, QZ ; Huang, GH
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2023
卷号	859
英文摘要	Soil bulk density (BD) is a parameter dependent on soil texture, compositions of soil minerals and organic matter and the extent of soil compaction. Seasonal freeze/thaw in arid areas with shallow groundwater tables (AASGT) may sig-nificantly change BD and hence soil hydrothermal properties and water holding capacity. Therefore, quantifying soil bulk density changes (BDC) under freeze/thaw conditions can improve estimates of soil water-salt dynamics in AASGT. In this study, we conducted field experiments to investigate the soil water-salt dynamics under freeze/thaw conditions from three typical land-use types (i.e., farmland, woodland, and natural land) in the upper Yellow River basin, China. We proposed a method to estimate BDC, which can better describe the soil water-salt dynamics during the freeze/thaw period. Our results showed marked BDC occurred in all layers within the 0-100 cm profile in natural land, while mainly at the 20-80 cm profile in farmland. During the freezing period, BD in farmland and natural land first decreased rapidly and then remained relatively stable until the thawing period started. After that, BD gradually increased during the thawing period. The largest BDC in farmland and natural land were 0.48 g cm-3 (occurring at the 30-40 cm layer) and 0.43 g cm-3 (occurring at the 80-90 cm layer), respectively, close to 30 % of their initial values. The differences in BDC between the three land-use types were mainly owing to their differences in groundwa-ter table depth, initial soil salt concentration, soil texture, and surface coverage conditions. Moreover, in farmland and natural land, ignoring BDC resulted in different degrees of overestimation or underestimation in soil water content, water fluxes, and soil hydrothermal properties in the selected soil layers. This study demonstrates that considering BDC can improve the accuracy of soil water-salt dynamics estimation in AASGT under freeze/thaw conditions.
英文关键词	Freeze thaw processes Soil deformation Water-salt dynamics Frost heaving Salinity control
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000899386400015
WOS关键词	THAWING PROCESSES ; FROST HEAVE ; PHYSICAL-PROPERTIES ; RIVER-BASIN ; SALINE SOIL ; CONDUCTIVITY ; SOLUTE ; SALINIZATION ; TRANSPORT ; HETAO
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/398487
推荐引用方式 GB/T 7714	Liu, Sheng,Huang, Quanzhong,Zhang, Wenxin,et al. An improved estimation of soil water and salt dynamics by considering soil bulk density changes under freeze/thaw conditions in arid areas with shallow groundwater tables[J],2023,859.
APA	Liu, Sheng.,Huang, Quanzhong.,Zhang, Wenxin.,Ren, Dongyang.,Xu, Xu.,...&Huang, Guanhua.(2023).An improved estimation of soil water and salt dynamics by considering soil bulk density changes under freeze/thaw conditions in arid areas with shallow groundwater tables.SCIENCE OF THE TOTAL ENVIRONMENT,859.
MLA	Liu, Sheng,et al."An improved estimation of soil water and salt dynamics by considering soil bulk density changes under freeze/thaw conditions in arid areas with shallow groundwater tables".SCIENCE OF THE TOTAL ENVIRONMENT 859(2023).