Abstract
Recently, ground degradation induced by soil pollution is reported and becomes one of the most serious environmental problem. The motion of the solute pollution material in the ground is explained in the framework of advection-dispersion phenomena. If the mass of solute material is not negligible in the view from mass of solvent material, the movement of solution becomes complex. Firstly, infiltration equation and advection-dispersion equation are derived from mass conservation law. Next, the fluid head is rewritten to apply the change of the fluid density. And the model to express the motions of the solute material in the change of solute density is established. Devised model is applied to vertical one-dimensional advection-dispersion calculation and the applicability is discussed. Additionally, governing equations are discretized, applied to 2-dementional finite difference method, considered the representation performance. Finally, it is found that the model show the enough performance to express the flow change in the ground derived from density variation of the fluid.
