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DOI	10.1016/j.scitotenv.2024.170548
	Effects of soil heterogeneity and preferential flow on the water flow and isotope transport in an experimental hillslope
	Chen, Xuegao; Yu, Zhongbo; Yi, Peng; Hwang, Hyoun-Tae; Sudicky, Edward A.; Tang, Tiantian; Aldahan, Ala
发表日期	2024
ISSN	0048-9697
EISSN	1879-1026
起始页码	917
卷号	917
英文摘要	Soil water movement plays vital roles in hillslope runoff generation and groundwater and surface water interaction. However, there are still knowledge gaps about the impacts of soil heterogeneity and preferential flow on the internal water flow and transport process. In this study, the vertical soil heterogeneity focused on the variations in soil retention capacity, and the consideration of lateral preferential flow emphasized the higher hydraulic conductivity. We combined isotopic tracing and numerical modeling in an artificial hillslope, focusing on monitored processes of the artificial rainfall and isotopic tracing experiment. The results showed that the soil moisture quickly accumulated at the bottom of the hillslope during rainfall events, while the 2H enrichment occurred in the topsoil derived from enriched isotope injection in the second artificial rainfall. The evaporation process slowed down the mixing of new water in the topsoil and old water in the lower layer. We found that the vertical soil heterogeneity had significant influences on the internal water and isotope transport paths within the hillslope. The lateral preferential flow played an important role in the water flux and transport time to the seepage face. The coupling of isotopic tracing, which reflects the water transport and mixing with the hillslope, effectively improved the model simulation and mechanism analysis of hillslope water flow. Our findings provide new insights into the mechanisms governing soil water flow and transport dynamics in hillslopes, taking into account vertical soil heterogeneity and lateral preferential flow.
英文关键词	Soil water flow and transport; Soil heterogeneity; Preferential flow; Isotopic tracing; HGS model; Integrated approach
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:001185147800001
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/299410
作者单位	Hohai University; Hohai University; Hohai University; Hohai University; University of Waterloo; Nanjing University of Posts & Telecommunications; United Arab Emirates University; Hohai University
推荐引用方式 GB/T 7714	Chen, Xuegao,Yu, Zhongbo,Yi, Peng,et al. Effects of soil heterogeneity and preferential flow on the water flow and isotope transport in an experimental hillslope[J],2024,917.
APA	Chen, Xuegao.,Yu, Zhongbo.,Yi, Peng.,Hwang, Hyoun-Tae.,Sudicky, Edward A..,...&Aldahan, Ala.(2024).Effects of soil heterogeneity and preferential flow on the water flow and isotope transport in an experimental hillslope.SCIENCE OF THE TOTAL ENVIRONMENT,917.
MLA	Chen, Xuegao,et al."Effects of soil heterogeneity and preferential flow on the water flow and isotope transport in an experimental hillslope".SCIENCE OF THE TOTAL ENVIRONMENT 917(2024).