气候变化领域集成服务门户(CCPortal): Experimental study of natural convection and cooling capacity of closed crushed-rock layers affected by summer rainfall in cold regions

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DOI	10.1016/j.coldregions.2023.104106
	Experimental study of natural convection and cooling capacity of closed crushed-rock layers affected by summer rainfall in cold regions
	Lv, Yang; Han, Fenglei; Cao, Hang; Geng, Yongqi; Qiu, Kaichi; Cheng, Lu; Yang, Wei; Deng, Kaiyu
发表日期	2024
ISSN	0165-232X
EISSN	1872-7441
起始页码	219
卷号	219
英文摘要	Climate-induced rises in air temperature and humidity on the Qinghai-Tibet Plateau modify the hydrothermal conditions of closed crushed-rock embankments (CRE). This alternation arises from the infiltration of summer rainfall, which is closely correlated with the cooling performance of the crushed-rock layers (CRL). Nevertheless, the cooling performance of the closed CRL during the summer rainfall season remains unexplored. In these present, physical models were employed to examine the convective properties and hydrothermal response processes. The results reveal that summer rainfall greatly diminishes the natural convection intensity within the closed CRL. Conversely, cycle-average temperatures showed an upward trend under these conditions. Moreover, based on fluctuations in the thawing/freezing index, the cooling capacity of the CRL weakens post-summer rainfall, with a maximum decline of 27.3% compared with the initial cycle. Additionally, the humidity in the subsoil layer experiences a stepwise growth followed by a gradual decrease owing to concentrated rainwater percolation. After enduring four rainfall events, the volumetric water content in the subsoil layer presents an upward trajectory. Overall, infiltrated water introduces additional heat, modifying the hydrothermal and convective properties of closed CRE, consequently impairing the cooling efficacy of the CRL.
英文关键词	Closed crushed -rock layer; Natural convection; Rainfall; Hydrothermal response; Thawing/freezing indexes
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
WOS记录号	WOS:001153956900001
来源期刊	COLD REGIONS SCIENCE AND TECHNOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/296027
作者单位	Chongqing Jiaotong University; Chongqing Jiaotong University; Chongqing Jiaotong University
推荐引用方式 GB/T 7714	Lv, Yang,Han, Fenglei,Cao, Hang,et al. Experimental study of natural convection and cooling capacity of closed crushed-rock layers affected by summer rainfall in cold regions[J],2024,219.
APA	Lv, Yang.,Han, Fenglei.,Cao, Hang.,Geng, Yongqi.,Qiu, Kaichi.,...&Deng, Kaiyu.(2024).Experimental study of natural convection and cooling capacity of closed crushed-rock layers affected by summer rainfall in cold regions.COLD REGIONS SCIENCE AND TECHNOLOGY,219.
MLA	Lv, Yang,et al."Experimental study of natural convection and cooling capacity of closed crushed-rock layers affected by summer rainfall in cold regions".COLD REGIONS SCIENCE AND TECHNOLOGY 219(2024).