In this study, column experiments were conducted to understand the release behavior of sediment from the sand columns. Further, a sediment filtration experiment was conducted under seepage flow with oscillating water head condition to investigate the permeability changes due to sediment migration. The results suggest that the permeability of the sand columns increased after making upward current, and increasing tendencies depended on the type of sediment. In addition, changes in piezo-metric head under seepage flow with oscillating water head condition could be simulated based on a conventional model with a relative error of 3%, leading to the prediction of decreases in porosity due to sediment retention. Therefore, changes in permeability of sand beds can be determined if the piezo-metric head is known.
