Abstract
In the present study, a numerical model for landfill liner has been presented. A geomembrane is overlying the clay liner is represented by one dimensional model. One dimensional governing equation for geomembrane considering diffusion is coupled with two dimensional contaminant transport phenomenon through clay liner. Analysis is performed using meshfree method called Element free Galerkin method. A FORTRAN program has been developed to obtain numerical solution and the results are validated with the results in the literature. The results are in good agreement. Parametric study has been performed to examine the effect of geomembrane layer and height of clay liner on the concentration of the contaminant. Effect of geomembrane overlain on two sand layers, sand and clay layers and clay layer has been observed. Normalized concentration is reduced after the use of geomembrane with soil. With increase in the thickness of clay layer significant reduction is observed in the normalized concentration.
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