Parameterization for turbulence induced flocculation of SPM based on directly-measured turbulent energy dissipation rate in coastal region

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In this study, a field observation on a relation between turbulent kinetic energy dissipation rates ε and floc size was carried out in Ariake Bay by using a microstructure profiler and a waterproof microscope. As a result of the observation, ε at flood and ebb tide were higher than that at slack tide. On the other hand, the observed floc diameters were around 10-15μm and had not changed drastically for a tidal period. In addition, floc diameters estimated by the model proposed by Winterwerp (2002) roughly corresponded to the observed values.