The transfer characteristics of water or non-adsorptive and desorptive solute in the unsaturated layer of solid wastes, which consist of incinerator residue andone including rice straw, are investigated using tritium (3H) as tracer material.
The results obtained from this study are as follows.
(1) The breakthrough curves from the series of experiments can not be explained by dispersion equation.
(2) The flow mechanism of water and the solute in the solid wastes is expressed by two layer flow model of stream region and stagnant region-
(3) The equation of two layer flow model is approximated by dispersion equation for sufficiently large values of Peclet number (Pe), and dispersion coefficient of unsaturated flow in the waste layer is expressed by flow rate per unit area and three parametersin the equation of two layer flow model.
