For investigating water quality change around the Isahaya Bay with the progress of a sea dyke construction, successive field observations and numerical simulations have been conducted. Observed data indicate clearly that water quality indices closely related to the tidal motion, and the biochemical oxygen demand varies as the change of the suspended solids(SS). Therefore, the numerical modelling of the SS is designed regarding to the resuspension and the deposition of particles. Calculated results show that current and wetland area in the bay reduce gradually as the on-going project, and the effect of deposition is dominant in the newly appeared pond. It suggests that the deterioration of water quality occurred from the bottom layer, and the attention must be paid to maintain a good water environment around the Isahaya Bay.

No abstract

No abstract

No abstract

No abstract