Author(s)

Y. Kyozuka & K. Yokoyama

Abstract

An assessment of the ocean environment is presented for an airport in Ariake Bay, which is well known for its large tides and vast tidal marsh. A newly developed ADI method including the effects of moving boundaries on the tidal marsh is applied for calculating the tides and currents in the bay. Moving boundaries on the tidal marsh are treated by a quasi-static approx- imation at every time step in the calculations. Assessment functions for the changes in tides and currents are defined by the ocean area which would be affected by the construction of an airport in the bay. Three locations for an island airport and an approaximated floating airport are compared in the assessment functions. Diffusion of COD from four rivers is also simulated and the distribution patterns of COD density after 30 tides a

Keywords