DYNAMICS OF SUSPENDED SEDIMENT AND VARIABILITY OF TIDAL FLAT SEDIMENT IN A TIDAL RIVER

河口悬浮物对理解生态和工程问题具有重要意义。为了揭示河流流量、潮差和风对泥沙输运的影响，利用声学多普勒水流剖面仪在太田洪道进行了长时间的观测。通常情况下，受限于淡水流量的潮汐张力作用，泥沙输运方向向上游移动。此外，还证实了潮滩的横向泥沙输运。此外，还澄清了潮滩沉积物的变异性。

Suspended sediments in estuaries play a significant role in understanding ecological and engineering problems. To shed light on the effects of river discharge, tidal range and wind on sediment transport, long-duration observations were carried out in the Ota floodway, using acoustic Doppler current profilers. In usually, the direction of the sediment transportation was toward upstream by the tidal straining for the restricted freshwater discharge. Furthermore, transverse sediment transports on tidal flats were demonstrated. In addition, the variability of tidal flat sediment was clarified.