Solute transport in nearly saturated porous media under landfill clay liners: A finite deformation approach

JOURNAL OF HYDROLOGY

卷:479

Article

Zhang, H. J.^1,2  Jeng, D. -S.^1,2,3  Barry, D. A.⁴  Seymour, B. R.⁵  Li, L.⁶ 

[1] Shanghai Jiao Tong Univ, Dept Civil Engn, Ctr Marine Geotech Engn, Shanghai 200240, Peoples R China

[2] Univ Dundee, Div Civil Engn, Dundee DD1 4HN, Scotland

[3] Griffith Univ, Griffith Sch Engn, Brisbane, Qld 4111, Australia

[4] Ecole Polytech Federale Lausanne EPFL, Fac Environm Nat Architectural & Construit ENAC, Lab Technol Ecol, Stn 2, CH-1015 Lausanne, Switzerland

[5] Univ British Columbia, Dept Math, Vancouver, BC V6T 1Z2, Canada

[6] Univ Queensland, Sch Civil Engn, Natl Ctr Groundwater Res & Training, St Lucia, Qld 4072, Australia

关键词: Material coordinates;    Finite deformation;    Degree of saturation;    Linear equilibrium sorption;    Porous flow;   

DOI  :  10.1016/j.jhydrol.2012.11.063

来源: Elsevier

【 摘 要 】

For solute transport in a deformable clay liner, the importance of consolidation in the presence of sorption and consolidation-induced advection are well known. Here a one-dimensional coupled consolidation and solute transport model for a partially saturated porous medium, including the new features of finite strain and geometric and material nonlinearity, is proposed. A new boundary condition at the compacted clay liner (CCL) base is also introduced. A comprehensive comparison demonstrates the significance of finite strain, compressibility of pore water (CPW), longitudinal dispersion (LD) and the degree of saturation on the solute transport in an unsaturated porous medium. Consolidation in the presence of sorption and consolidation-induced advection both affect solute transport in a deformable clay liner. Here, a one-dimensional coupled consolidation and solute transport model for a nearly saturated porous medium, including finite strain and geometric and material nonlinearity, was proposed. A new boundary condition at the compacted clay liner base was also introduced. The model demonstrates the significance of finite strain, pore water compressibility, dispersion and the degree of saturation on solute transport in an unsaturated, consolidating porous medium. (C) 2012 Elsevier B.V. All rights reserved.

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