ABSTRACT
Land-based containment facilities are commonly used for the disposal of municipal solid waste and contaminated dredged material. In modern landfills, liner systems are designed to isolate the landfill contents from the surrounding environment to protect the groundwater from pollution. For well-constructed composite liners, the geo-membrane typically has few defects, so restricting advection through it. In this chapter, the small deformation model for solute transport in a nearly saturated medium will be further extended to finite deformations. This allows us to clarify the influence of consolidation in the progress 50of solute transport (using a time-dependent boundary in terms of void ratio at the CCL base). The influence of the degree of saturation on the volatile organic compounds (VOC) transit time in clay barriers will also be examined. To account for the geometric non-linearity, a material coordinate system is used. Both CPW and dispersivity are considered in the new model. Further, our approach incorporates nonlinearity of the constitutive properties related to soil compressibility, the hydraulic conductivity and decreasing effective diffusion coefficient. A parametric study is carried out to examine the influence of several dominant parameters on the process of solute transport in porous medium.
