抄録
Data of current, water density, and suspended sediment (SS) were collected for about 3 months in the Ohta floodway to clarify characteristics of SS transport in tidal estuary where flow and density conditions change significantly. The SS transport intermittently occurs, and most of that occurs just before and after lower low water slack. Moreover, it is found out that the long term variation of SS transport is concerned with river discharge and tidal range. Peaks of the SS transport on the flood tide are higher than those on the ebb tide during the spring tide. Spatial variation of SS transport is examined from observations at longitudinal three measurement positions, which are located at about 2.8km, 5.8km and 8.8km.upstream from the mouth.
