THE NUMERICAL SIMULATION OF SOLUTE TRANSFER IN SATURATED AND UNSATURATED SOIL

In the present paper, numerical simulation of solute transfer in saturated and unsaturated soil is given. The convection and dispersion terms in the equations governing water and salt motion are solved respectively by using Langrangean moving coordinate and Eulerian fixed coordinate systems. Furthermore, cubic spline interpolation method is employed for the projection from the fixed coordinate to the moving coordinate, which makes the model more exact and simpler. The comparisons with theoretical solution i...