천해조 및 조간대가 발달된 하구에서의 부유사이동 특성

Abstract

The characteristics of suspended sediment transport are analyzed at the estuaries which showsignificant shalow water tides, following the previous research for bottom sediment transport at the sameestuaries. Several theories which are related with the formation and transition of turbidity maximum arereconfirmed by the numerical experiments. The experiments suggest the necessity of modeling the shallow watertide as a boundary condition, as was also sugested for the bed sediment transport at the previous research. Boththe differences of transport characteristics betwen bed and suspended sediment and the differences betweenflood/ebb dominances and high/low water dominances are also examined at the Keum River and Youngsan Riverestuaries. In addition, the transport of bed and suspended sediments are found to have the oposite directions atthe Youngsan River estuary which has extensive tidal flat, and thus shows pronounced ebb dominance, which isconsidered to be a main reason of keeping present bathymetry.