An analysis on dispersion of suspended particles due to the tarnsient drift current

Dispersion process of the suspended particles near the sea surface has been analyzed taking more realistic transient drift current into account as the continuation of the previous work in which dispersion had been analyzed assuming the stationary drift current. Since the transient current cannot be expressed as an analytical form, the dispersion process was obtained from the numerical integration of the formal solution of the advective diffusion equation. This analysis has shown that the transient drift current induced dominant dispersion even at the initial stage as well as the stationary current because the transient one reached the stationary value at the sea surface at the early stage though the stationary value was not been easily recognized at some level from the sea surface.