Abstract
In order to evaluate the environmental impact of marine development in the enclosed sea, numerical simulations of the tidal current and eco-system became very important. The tidal current is influenced by various parameters, namely, wind, river water, air temperature, solar radiation and etc as well as the bay shape and the depth, but systematic parameter studies are not made so much. In this paper, in order to confirm the applicability of the tidal current simulation by multi level model, following items are discussed. 1) Tidal current simulations of the supposed rectangular bay and comparisons with the liner long wave theory 2) Tidal current simulations of the Ariake sea and comparisons with the Ariake project data, considering the effects of wind and river flow 3) Nutrient salt transport and sediment transport from the sea bottom layer by upwelling, considering settling velocity, from viewpoint of ocean nourishment and transportation
