气候变化领域集成服务门户(CCPortal): Study on the Effect of Unilateral Sand Deposition on the Spatial Distribution and Temporal Evolution Pattern of Temperature beneath the Embankment

CCPortal

DOI	10.1155/2021/5403567
	Study on the Effect of Unilateral Sand Deposition on the Spatial Distribution and Temporal Evolution Pattern of Temperature beneath the Embankment
	Chen, Ling; Yu, Hong; Li, Xiaolin; Ding, Zekun
通讯作者	Chen, L (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soils Engn, Lanzhou 730000, Gansu, Peoples R China. ; Chen, L (通讯作者)，Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
发表日期	2021
ISSN	1687-8434
EISSN	1687-8442
卷号	2021
英文摘要	In the context of climate warming and the frequent wind-sand hazards in the Qinghai-Tibet Engineering Corridor (QTEC), the construction of the embankment will affect the thermal regime of permafrost underground. The influence of embankment construction on the variation of the permafrost table beneath it is different, especially for the regime with different mean annual ground temperatures (MAGTs). In this study, the effects of the unilateral sand particles deposition on the spatial distribution and temporal evolution pattern of temperature beneath the embankment are investigated through the numerical simulations, in which the heat transfer is considered. The model is validated by the field observed data of soil temperatures around an experimental zone built at the sand hazard area in Honglianghe, the interior of Qinghai-Tibet Plateau (QTP). The simulated results indicate that the temperature field beneath the embankment is asymmetrically distributed under the condition of unilateral sand particles deposition. This asymmetry gradually weakened with the increase of operation time and the gradual adjustment of the permafrost temperature field. By comparing the permafrost table beneath the natural surface, the sand deposition center, and the middle of the embankment center, it could be found that the unilateral sand particles deposition has less effect on the degradation of the permafrost table in the center of the embankment. However, for the center of the sand deposition, the change of the permafrost table is larger with the increase of time and the corresponding rate of permafrost table degradation is higher than that without sand particles deposition, especially for the high-temperature permafrost. In addition, with different sand thickness and width conditions, the effect of narrow-thick form sand particles deposition on the temperature field beneath embankment is greater than that of wide-thin form sand deposition. Hence, in order to reduce its impact on the long-term thermal condition beneath the embankment, it is necessary to clean the thicker deposition sand particles at the toe of the embankment.
关键词	CRUSHED-ROCK PERMAFROST CLIMATE
语种	英语
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:000672168300001
来源期刊	ADVANCES IN MATERIALS SCIENCE AND 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/254551
作者单位	[Chen, Ling; Yu, Hong; Ding, Zekun] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soils Engn, Lanzhou 730000, Gansu, Peoples R China; [Chen, Ling; Ding, Zekun] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Yu, Hong] Lanzhou Univ Technol, Sch Civil Engn, Lanzhou 730050, Gansu, Peoples R China; [Li, Xiaolin] Jiaxing Univ, Coll Civil Engn & Architecture, Jiaxing 314001, Peoples R China
推荐引用方式 GB/T 7714	Chen, Ling,Yu, Hong,Li, Xiaolin,et al. Study on the Effect of Unilateral Sand Deposition on the Spatial Distribution and Temporal Evolution Pattern of Temperature beneath the Embankment[J]. 中国科学院西北生态环境资源研究院,2021,2021.
APA	Chen, Ling,Yu, Hong,Li, Xiaolin,&Ding, Zekun.(2021).Study on the Effect of Unilateral Sand Deposition on the Spatial Distribution and Temporal Evolution Pattern of Temperature beneath the Embankment.ADVANCES IN MATERIALS SCIENCE AND ENGINEERING,2021.
MLA	Chen, Ling,et al."Study on the Effect of Unilateral Sand Deposition on the Spatial Distribution and Temporal Evolution Pattern of Temperature beneath the Embankment".ADVANCES IN MATERIALS SCIENCE AND ENGINEERING 2021(2021).