干旱区生态环境知识资源中心(Arid): Investigation on the hydraulic response of a bioengineered landfill cover system subjected to extreme drying-wetting cycle

Arid

DOI	10.1007/s10064-023-03518-4
	Investigation on the hydraulic response of a bioengineered landfill cover system subjected to extreme drying-wetting cycle
	Guo, Haowen; Zhang, Qi; Lu, Zhao; Wei, Wei; Lu, Hu; Chen, Hongqi
通讯作者	Zhang, Q
来源期刊	BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
ISSN	1435-9529
EISSN	1435-9537
出版年	2024
卷号	83 期号:1
英文摘要	Construction wastes such as recycled concrete have been widely reused in geotechnical engineering to reduce environmental pollution and preserve natural resources. In this study, a one-dimensional (1D) soil column test was carried out to evaluate the hydrological performance of a three-layer landfill cover system using recycled concrete aggregates (RCA) under humid climatic conditions. This three-layer system consists of a layer of fine-grained and a layer of coarse-grained recycled aggregates (i.e. FRC and CRC) overlying the bottom silt refuse soil. Numerical simulations were conducted to analyse the model test and investigate the effects of the bottom layer and climate conditions on the performance of the three-layer landfill cover system. Consistent results were obtained between the measured data and numerical predictions. The matric suctions in the vegetated cover were nearly 80% higher than the bare cover after drying for 14 days from a nearly saturated condition. Even after the simulated extreme rainfall of Hong Kong with a return period of 100 years, a higher suction was also well-retained in vegetated cover. This was due to the initial high suction induced by evapotranspiration of plants, which led to the infiltration rates into grassed cover being up to 30% lower than the bare one. The results from the numerical parametric analysis suggest a bottom soil layer with an effective particle size (d10) value of 0.02 mm and 0.2 mm to be used in the three-layer landfill cover system under humid and semi-humid climates, respectively. For semi-arid or even arid regions, a two-layer cover with capillary barrier effects (CCBE) is already sufficient for preventing water percolation as the rainfall in those areas is not heavy.
英文关键词	Bioengineered Cover system Water retention Water infiltration Drying-wetting cycle
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001126590700003
WOS关键词	SUCTION DISTRIBUTION ; CAPILLARY ; CONDUCTIVITY ; INFILTRATION ; EXTRACTION ; CAPACITY ; BEHAVIOR ; GROWTH
WOS类目	Engineering, Environmental ; Engineering, Geological ; Geosciences, Multidisciplinary
WOS研究方向	Engineering ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403090
推荐引用方式 GB/T 7714	Guo, Haowen,Zhang, Qi,Lu, Zhao,et al. Investigation on the hydraulic response of a bioengineered landfill cover system subjected to extreme drying-wetting cycle[J],2024,83(1).
APA	Guo, Haowen,Zhang, Qi,Lu, Zhao,Wei, Wei,Lu, Hu,&Chen, Hongqi.(2024).Investigation on the hydraulic response of a bioengineered landfill cover system subjected to extreme drying-wetting cycle.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,83(1).
MLA	Guo, Haowen,et al."Investigation on the hydraulic response of a bioengineered landfill cover system subjected to extreme drying-wetting cycle".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 83.1(2024).