Abstract
A new combined diagnostic and prognostic numerical simulation method to estimate the environmental effect of very large floating structure on the water circulation is reportd.
In this method, two domains which has different size and different resolution are used. In the first step, diagnostic model is applied to wide domain to reproduce wide-range current, temperature and salinity field. In the second step, prognostic model is applied on the small area near the floating structure. The result of diagnostic calculation is used as the boundary condition for the prognostic calculation.
As an application, the evaluation of water mass exchange under the imaginary floating structure which is settled off Kansai international airport is reportd. Water particle tracing method is performed with the prognostic calculation, and as the result, it is found that there are remarkable dirrerences between the spatial distribution of water particles with floating structure and that without floating structure, but average residence time does not change widely whether the floating structure exists or not.
