干旱区生态环境知识资源中心(Arid): Experimental study of the effect of shallow groundwater table on soil thermal properties

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	Experimental study of the effect of shallow groundwater table on soil thermal properties
	Jiang Jianmei; Zhao Lin; Zeng Yijian; Zhai Zhe
来源期刊	Frontiers of Earth Science
ISSN	2095-0195
出版年	2016
卷号	10 期号:1 页码:29-37
英文摘要	In plains areas with semi-arid climates, shallow groundwater is one of the important factors affecting soil thermal properties. In this study, soil temperature and water content were measured when groundwater tables reached 10 cm, 30 cm, and 60 cm depths (Experiment I, II, and III) by using sensors embedded at depths of 5 cm, 10 cm, 20 cm, and 30 cm for 5 days. Soil thermal properties were analyzed based on the experimental data using the simplified de Vries model. Results show that soil water content and temperature have fluctuations that coincide with the 24 h diurnal cycle, and the amplitude of these fluctuations decreased with the increase in groundwater table depth. The amplitude of soil water content at 5 cm depth decreased from 0.025 m~3·m~(-3) in Experiment II to 0.01 m~3·m~(-3) in Experiment III. Moreover, it should be noted that the soil temperature in Experiment III gradually went up with the lowest value increasing from 26.0°C to 28.8°C. By contrast, the trends were not evident in Experiments I and II. Results indicate that shallow groundwater has a cooling effect on soil in the capillary zone. In addition, calculated values of thermal conductivity and heat capacity declined with the increasing depth of the groundwater table, which is consistent with experimental results. The thermal conductivity was stable at a value of 2.3W·cm~(-1)·K~(-1) in Experiment I. The average values of thermal conductivity at different soil depths in Experiment II were 1.82W·cm~(-1)·K~(-1), 2.15W·cm~(-1)·K~(-1), and 2.21W·cm~(-1)·K~(-1), which were always higher than that in Experiment III.
英文关键词	soil temperature thermal property groundwater table depth evaporation
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Science & Technology - Other Topics
CSCD记录号	CSCD:5681143
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335634
作者单位	Jiang Jianmei, School of Chemical Engineering, Tianjin University, Tianjin 300072, China.; Zhao Lin, School of Chemical Engineering, Tianjin University, Tianjin 300072, China.; Zeng Yijian, Water Resources Department, ITC Faculty, University of Twente, Enschede, Netherlands 7514.; Zhai Zhe, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China.
推荐引用方式 GB/T 7714	Jiang Jianmei,Zhao Lin,Zeng Yijian,et al. Experimental study of the effect of shallow groundwater table on soil thermal properties[J],2016,10(1):29-37.
APA	Jiang Jianmei,Zhao Lin,Zeng Yijian,&Zhai Zhe.(2016).Experimental study of the effect of shallow groundwater table on soil thermal properties.Frontiers of Earth Science,10(1),29-37.
MLA	Jiang Jianmei,et al."Experimental study of the effect of shallow groundwater table on soil thermal properties".Frontiers of Earth Science 10.1(2016):29-37.