Computation of Sodium and Chloride Migration Through Layered Soil Media Using FDM

Finite difference method (FDM) has been adapted herein to analyze the performance of fully saturated clay barrier by using 1-D contaminant transport model to predict migration of two typical contaminant species, namely, sodium and chloride from the leachate of municipal waste landfill. The constructed clay liner media compacted in different lifts or the natural clay deposit beneath the landfill is heterogeneous in nature. This type of heterogeneity has been solved easily by idealizing the hydrostratigraphy of the barrier media as being horizontally layered with the soil properties being the same at any horizontal location within the layer. The program CONTAMINATE-1D LAYER has been developed to analyze the model with the newly developed solution technique simulating the parametric values those are evaluated and used by several other investigators previously. The concentration profiles have been illustrated in this paper. The design charts for liners are developed to facilitate the practicing engineers. Indian Geotechnical Conference – 2010, GEOtrendz December 16–18, 2010 IGS Mumbai Chapter & IIT Bombay