气候变化领域集成服务门户(CCPortal): Thermal-moisture dynamics of embankments with asphalt pavement in permafrost regions of central Tibetan Plateau

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DOI	10.1080/19648189.2014.945043
	Thermal-moisture dynamics of embankments with asphalt pavement in permafrost regions of central Tibetan Plateau
	Wen, Zhi; Zhang, Mingli; Ma, Wei; Wu, Qingbai; Niu, Fujun; Yu, Qihao; Fan, Zhaosheng; Sun, Zhizhong
发表日期	2015
ISSN	1964-8189
EISSN	2116-7214
起始页码	387
结束页码	399
卷号	19 期号:4
英文摘要	Subsurface moisture content is one of the critical factors that control the thermal dynamics of embankments. However, information on the subsurface moisture movement and distribution in embankments is still limited. To better understand the coupled water and heat transport within embankments, subsurface temperature and moisture of an asphalt pavement highway were extensively measured from 2009 to 2011. Collected data indicate that pure heat conduction is the overall main mechanism of heat transport in the embankment and heat convection plays a relatively unimportant role in heat transport. The results also indicate that subsurface moisture and temperature dynamics in the asphalt layer is strongly related to the rainfall events, while the subsurface moisture content below the road base course maintains relatively constant. Rainfall in summer leads to rapid cooling of the subsurface soil. Our results suggest that frequent and small rainfall events favour the thermal stability of the embankment due to the loss of latent heat of water evaporation. Moisture migration during freezing still occurred in the gravel fill and the water infiltrated into the active layer during thawing period. Freezing-induced water migration may result in the increase in water content of the embankment and the decrease in compactness of gravel fill.
英文关键词	permafrost; soil moisture content; soil temperature; asphalt pavement; Qinghai-Tibetan Plateau; rainfall
语种	英语
WOS研究方向	Engineering
WOS类目	Engineering, Civil ; Engineering, Geological
WOS关键词	ACTIVE LAYER ; NORTH
WOS记录号	WOS:000350040900001
来源期刊	EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
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/240290
作者单位	[Wen, Zhi; Zhang, Mingli; Ma, Wei; Wu, Qingbai; Niu, Fujun; Yu, Qihao; Sun, Zhizhong] Chinese Acad Sci, CAREERI, State Key Lab Frozen Soil Engn, Lanzhou, Peoples R China; [Fan, Zhaosheng] Argonne Natl Lab, Argonne, IL 60439 USA
推荐引用方式 GB/T 7714	Wen, Zhi,Zhang, Mingli,Ma, Wei,et al. Thermal-moisture dynamics of embankments with asphalt pavement in permafrost regions of central Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2015,19(4).
APA	Wen, Zhi.,Zhang, Mingli.,Ma, Wei.,Wu, Qingbai.,Niu, Fujun.,...&Sun, Zhizhong.(2015).Thermal-moisture dynamics of embankments with asphalt pavement in permafrost regions of central Tibetan Plateau.EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING,19(4).
MLA	Wen, Zhi,et al."Thermal-moisture dynamics of embankments with asphalt pavement in permafrost regions of central Tibetan Plateau".EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING 19.4(2015).