SEASONAL VARIATION CHARACTERISTICS OF THE SUSPENDED SEDIMENT TRANSPORTATION IN THE MUDFLAT OF THE ARIAKEBAY

Abstract

  Long term observation for the suspended sediment transport in the inner part of the Ariake Bay, Japan. Acoustic Doppler Current Profiler were used to estimate the vertical distribution of the suspended particle matter. Also, the suspended sediment flux for the two observation station were calculated. The result of the observation shows that the suspended sediment was come from the offshore and accumulated to the tidal flat of the Ariake Bay. In the season of the laver cultivation, suspended sediment from offshore was accumulated in the field of the cultivation. After the season of the laver cultivation, suspended sediment was moved again to the tidal flat. Bottom mud density and shear strength was matched with the suspended sediment budget in the observed field.