Abstract
To clarify the sediment transport on the tidal flat of the Ariake Sea, we studied SS concentration and nutrient concentration by the simultaneous observation by mooring and shuttle ship over 10 hours. The contribution of the erosion, deposition, storage by water depth change and advection were calculated by using empirical formulae of the erosion and deposition. It was clarified that high concentration of SS was observed around the mud shore line and its advection affected the SS concentration on the tidal flat as well as re-suspension caused by bottom shear stress. The water mass of high nutrient, which came from the river was transported by tide.
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