On the basis of the finite difference approximation to the water and concentration equation.A numerical model is developed to predict water and contaminant transport through water unsaturated,multilayered soils.Calculated results are presented for two and three layered soils during water infiltration and redistribution.Linear equilibrium adsorption and first order kinetic reaction are used to describe contaminant adsorption in individual soil layers.It has been found that for all adsorption mechanisms c...