Abstract
3-D near-bottom velocities were measured with high resolution in space and time to elucidate dynamics in the bottom boundary layer and resuspension process of fine bottom sediment at a coast off the Port of Kumamoto. Acoustic devices, including Acoustic Doppler Velocimeters (ADV) and Acoustic Doppler Profilers (ADP), were introduced to the velocity measurement and they were compared with ambient suspended solid concentrations monitored at the same time. Tidal asymmetry was observed in the data both of current velocities and suspended solid concentrations near the bed and higher concentration appeared during flood tide with higher turbulence near the bed.
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