Abstract

Sediment transport in Ariake Bay is simulated by FVCOM-based numerical model. The sediment flux toward the head of the bay in upper Ariake Bay is reproduced by the model. Variations of sediment flux due to the growth of Chikugo River.'s plume and passing typhoon is also discussed. In addition, the effect of Isahaya Bay\. reclamation on the sediment transport process is discussed. Sediment flux around Isahaya Bay is significantly decreased and it may be the cause of the increasing transparency in lower Ariake Bay after 1990's.

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