Modeling of the sediment transport based on multiphase turbulent flow dynamics in surf zones

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We measured the velocity field and suspended sediment concentration in laboratory surf zones using a Particle Image Velocimetry (PIV) and an optical concentration probe to clarify the sediment transport process under breaking waves. The pick-up coefficient acquired in this small-scale experiment was much higher than that in the large-scale experiments and field observations. The sediments are immediately suspended when the turbulent energy is provided to the bed. Suspended sand concentrations near the bottom tend to increase with the turbulent energy.