Abstract
In this study, we visualize the transition of state and the sand distribution of the transported sediment in an oscillatory flow. The visualized images of sediment transport in an oscillatory flow in a small tank are taken with a digital video camera. The variation of brightness from the initial image is measured by the personal computer on every pixel in the flame. It is transformed to the concentration of sand by using the calibration relationship between the brightness and the distribution of sand. The result shows that distribution of transported sand is dependent on the velocity or flow like eddy of external fluid.
