Abstract
The influence of flow velocity and particle size distribution on the dispersion coefficient of water in saturated flow has been studied experimentally. The dispersion coefficient of water was determined by means of the comparison of theoretical effluent curve with effluent concentrations of tritium through porous medium. As the results of measurements, it was found that the dispersion coefficient was proportional to the 1.2th power of flow velocity in all cases of particle size distribution. The dispersion coefficient in the porous medium with a given size distribution agreed sufficiently with the volume mean of that of each particle size, and it was found that the dispersion coefficient was almost all proportional to the mean particle size of the porous medium.
