CHARACTARISTICS OF FINE-GRAINED SEDIMENT TRANSPORT IN THE COATAL AREA OF ISHIKARI BAY

Abstract

A three-dimensional hydrodynamic Princeton Ocean Model was used to compute the suspended particulate matter (SPM) transport in Ishikari Bay from February to March 2002. The sources of SPM were the input of the Ishikari River and the erosionof fine-grained sediment by stress of wave-driven and wind-driven currents in this model. The model can represent the turbidity in the coastal station of the depth 25m in Ishikari Bay. The model results show that fine-grained sediment suspended by bottom stress caused by a strong wind and high wave are moving to the southern area and the coastal area of Otaru with the characteristic costal currents in winter.