Numerical Study on the Sediment Transport and Morphologic Change of Intertidal Flats by Tides and Wind Waves

Abstract

The wave forcing term and a sediment transport model of sands were installed into the cohesive sediment transport model named “WD-POM” in order to calculate the morphologic change of intertidal flats due to tides and wind waves. Current fields and morphologic changes in the back of the offshore breakwater were calculated by using the improved model. Numerical results were agreed qualitatively with other experimental results. The model was also applied to the case of oblique incident waves on the uniformly inclined slope. The longshore sediment transport rate agreed quantitatively with the value estimated by using the longshore sediment transport formula. Furthermore, the improved model was applied to the Shirakawa intertidal flat in the Ariake Sea and current fields and morphologic changes were calculated.