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DOI	10.1007/s10040-021-02372-6
	Evolution of soil-water states in the vadose zone of a desert soil after an extreme rainfall event and its impact on the ecosystem
	Zhou, Hong; Zhao, Wen Zhi
通讯作者	Zhao, WZ (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Inland River Basin Ecohydrol, Linze Inland River Basin Res Stn, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	1431-2174
EISSN	1435-0157
起始页码	2127
结束页码	2147
卷号	29 期号:6
英文摘要	Evolution of soil-water movement patterns following rare and extreme rainfall events in arid climates is not well understood, but it has significant effects on water availability for desert plants and on the hydrological cycle at small scale. Here, field data and the Hydrus-1D model were used to simulate the mechanisms of soil water and vapor transport, and the control factors associated with temporal variability in the soil water and temperature were analyzed. The results showed that thermal vapor transport with a no rainfall scenario determined daily variability in water content at the soil surface. During rainfall, isothermal liquid water fluctuated as a result of dry sandy soils and matric potential in the upper soil (0-25 cm), and thermally driven vapor played a key role in soil-water transport at 40-60 cm soil depth. After an extreme rainfall event, thermal vapor flux increased and accounted for 11.8% of total liquid and vapor fluxes in daytime with a steep temperature gradient; this was very effective in improving long-term soil-water content after the rain. The simulated results revealed that thermal water vapor greatly contributed to the soil-water balance in the vadose zone of desert soil. This study provided an alternative approach to describing soil-water movement processes in arid environments, and it increased understanding of the availability of water for a desert plant community.
关键词	VAPOR MOVEMENT HALOXYLON-AMMODENDRON HEAT-TRANSPORT POROUS-MEDIA LIQUID WATER EVAPORATION OASIS DIFFUSION FLOW RESPONSES
英文关键词	Unsaturated zone; Liquid water and water vapor movement; Rainfall; Desert system; Hydrus-1D
语种	英语
WOS研究方向	Geology ; Water Resources
WOS类目	Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:000661401100001
来源期刊	HYDROGEOLOGY JOURNAL
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/253717
作者单位	[Zhou, Hong] Northwest Normal Univ, Coll Tourism, Lanzhou 730070, Peoples R China; [Zhou, Hong; Zhao, Wen Zhi] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Inland River Basin Ecohydrol, Linze Inland River Basin Res Stn, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Hong,Zhao, Wen Zhi. Evolution of soil-water states in the vadose zone of a desert soil after an extreme rainfall event and its impact on the ecosystem[J]. 中国科学院西北生态环境资源研究院,2021,29(6).
APA	Zhou, Hong,&Zhao, Wen Zhi.(2021).Evolution of soil-water states in the vadose zone of a desert soil after an extreme rainfall event and its impact on the ecosystem.HYDROGEOLOGY JOURNAL,29(6).
MLA	Zhou, Hong,et al."Evolution of soil-water states in the vadose zone of a desert soil after an extreme rainfall event and its impact on the ecosystem".HYDROGEOLOGY JOURNAL 29.6(2021).