气候变化领域集成服务门户(CCPortal): A novel transport model to predict the moisture-heat-gas-salt behavior in unsaturated saline soil under evaporation

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DOI	10.1016/j.jhydrol.2021.127052
	A novel transport model to predict the moisture-heat-gas-salt behavior in unsaturated saline soil under evaporation
	Lai, Yuanming; Wen, Wei; Pei, Wansheng; Wan, Xusheng
发表日期	2021
ISSN	0022-1694
EISSN	1879-2707
卷号	603
英文摘要	Soil desertification and salinization are common in arid and semi-arid regions, and can result in roads being buried by quicksand or corroded by salts. Therefore, it is important to investigate the salt transportation under evaporation in these regions. To analyze the transport law of moisture, heat, gas, and salt in unsaturated saline soil, a series of evaporation tests were conducted. Based on these tests, the novel mass and energy conservation equations suitable for medium transfer in unsaturated saline soil were then developed. In the model, the non-equilibrium phase process between the liquid water and vapor was considered. Meanwhile, the convective heat transfer caused by small temperature difference between the liquid pore water and soil grains was also considered. Validation of the model was illustrated by comparisons between the simulation and experimental results. It is found that the evaporation of pore water is accompanied by the precipitation of solute. The vapor condensation at low temperature zone can dilute the solute concentration. In addition, the permeability of surface has significant effect on the moisture-heat-gas-salt migration. The novel model can effectively describe the moisture-heat-gas-salt interaction process and reveal the temperature difference between soil grains and pore fluid under the evaporation of pore water.
英文关键词	Unsaturated saline soil; Non-equilibrium equation; Mixture theory; Moisture-heat-gas-salt transport
语种	英语
WOS研究方向	Engineering ; Geology ; Water Resources
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS关键词	HYDRAULIC CONDUCTIVITY ; THERMAL-CONDUCTIVITY ; POROUS-MEDIA ; BARE-SOIL ; WATER ; CRYSTALLIZATION ; SOLUTE ; ACCUMULATION ; COEFFICIENTS ; GROUNDWATER
WOS记录号	WOS:000715326800009
来源期刊	JOURNAL OF HYDROLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239551
作者单位	[Lai, Yuanming; Pei, Wansheng] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China; [Lai, Yuanming; Pei, Wansheng] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Wen, Wei] Changsha Univ Sci & Technol, Sch Civil Engn, Changsha 410114, Peoples R China; [Wan, Xusheng] Southwest Petr Univ, Sch Civil Engn & Geomat, Chengdu 610500, Peoples R China
推荐引用方式 GB/T 7714	Lai, Yuanming,Wen, Wei,Pei, Wansheng,et al. A novel transport model to predict the moisture-heat-gas-salt behavior in unsaturated saline soil under evaporation[J],2021,603.
APA	Lai, Yuanming,Wen, Wei,Pei, Wansheng,&Wan, Xusheng.(2021).A novel transport model to predict the moisture-heat-gas-salt behavior in unsaturated saline soil under evaporation.JOURNAL OF HYDROLOGY,603.
MLA	Lai, Yuanming,et al."A novel transport model to predict the moisture-heat-gas-salt behavior in unsaturated saline soil under evaporation".JOURNAL OF HYDROLOGY 603(2021).