In order to study the flow exchange process in pore water,particle migration and small scale bed medium heterogeneity,based on the flume experiment and the internal structure of a three-dimensional image of experimental samples obtained by using X-ray microanalysis technique of computed tomography,the riverbed medium formation process was simulated using lattice Boltzmann method.Research results showed that in the riverbed dielectric formation and migration process,with the particle transport process of development,the upper part of the river bed permeability increases gradually,with fine sand into the medium,the permeability decreases below the river bed.
