Abstract

The influence of a meander on a cross-sectional distribution of turbidity maximum was investigated in the estuarine channel of the Chikugogawa river. The along-river current was relatively week and the suspended sediment concentration was high at the inside of the curve during flood tide. The river water of near-bottom layer flowed to the inside of the curve during flood tide. Furthermore, the thickness of high SS concentration layer increased during flood tide. These facts suggest that the secondary current occur in the meander of tidal channel and the suspended sediment transported by the turbidity maximum is moved into the inside of the bend. And concentrated fine particles deposit on the bed and change to the mud.

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