气候变化领域集成服务门户(CCPortal): Numerical Modelling of consolidation-induced solute transport in unsaturated soil with dynamic hydraulic conductivity and degree of saturation

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DOI	10.1016/j.advwatres.2019.103466
	Numerical Modelling of consolidation-induced solute transport in unsaturated soil with dynamic hydraulic conductivity and degree of saturation
	Wu S.; Jeng D.-S.; Seymour B.R.
发表日期	2020
ISSN	0309-1708
卷号	135
英文摘要	The effects of the pore pressure related dynamic hydraulic conductivity and dynamic degree of saturation on the consolidation-induced solute transport in deformable unsaturated soils are investigated. The storage equation and solute transport equations are revised to account for the dependence of these two soil parameters on pore pressures. Three dynamic models were conducted for dynamic hydraulic conductivity, dynamic degree of saturation, and both. Compared with the conventional model, the simulation results showed that both hydraulic conductivity and degree of saturation increased near the soil surface where pore pressure exceeded air-entry value. Dynamic hydraulic conductivity results in a slightly slower solute transport while dynamic degree of saturation accelerates the migration of contaminants. Including both dynamic effects produced limited differences in solute concentration, while consolidation results were affected significantly. Although dynamic degree of saturation has some influences on consolidation-induced solute transport, the correlation of the dynamic path is less significant. The air-entry value is an important parameter to determine when soil parameters become dynamic, and it affects the soil consolidation process in certain extent. This study provides new methods to incorporate in-homogeneous soil parameters, which are not only spatiotemporal variables, but also dynamic variations with pore pressure. © 2019 Elsevier Ltd
关键词	Consolidation Deformation Hydraulic conductivity Pore pressure Soil mechanics Soil moisture Supersaturation Conventional modeling Deformable soil Degree of saturations Soil consolidation Solute concentrations Solute-transport equation Spatio-temporal variables Unsaturated soil Solute transport consolidation deformation dynamic analysis hydraulic conductivity numerical model saturated medium solute transport unsaturated medium
语种	英语
来源机构	Advances in Water Resources
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/131891
推荐引用方式 GB/T 7714	Wu S.,Jeng D.-S.,Seymour B.R.. Numerical Modelling of consolidation-induced solute transport in unsaturated soil with dynamic hydraulic conductivity and degree of saturation[J]. Advances in Water Resources,2020,135.
APA	Wu S.,Jeng D.-S.,&Seymour B.R..(2020).Numerical Modelling of consolidation-induced solute transport in unsaturated soil with dynamic hydraulic conductivity and degree of saturation.,135.
MLA	Wu S.,et al."Numerical Modelling of consolidation-induced solute transport in unsaturated soil with dynamic hydraulic conductivity and degree of saturation".135(2020).