Abstract
The behaviour of suspended sediments in an estuary was investigated by use of an annular flume with the condition of cyclically changed shear stress and field data on suspended solids and velocities obtained at the River Chikugo.
Conclusions derived in this study were as follows :
(1) The behaviour of suspended solids in the case of mulls differed from that in the case of sands.
(2) In the case of muds, the changes of suspended solids were explained by introducing four critical shear stresses, namely, τce1, τce2, τcd1 and τcd2.
(3) In an estuary, the high SS waters moved up- and down-stream undertaking the erosion and deposition.
(4) Erosional and depositional fluxes in a tidal cycle at the River Chikugo were estimated based on the field data. The variation of these fluxes with bed shear stress showed the same tendency as those obtained in the experiments.
