Influence of Wind-induced Currents to Sand Drift around Bakkai Fishing Port

Abstract

In Bakkai Fishing Port where the sand drift phenomenon has been occurring, the burial of the port and the channel is longstanding problem. Generally, a sand drift simulation at a coastal area where tidal fluctuation is small, only wave-induced currents are considered. However, at this area, waves are interrupted by Islands and merely weak currents are generated. On the other hand, this area is high wind site, so there is a possibility that the currents due to wind influence the flow environment. In this paper, (1) we figured out the sand movement and its generation mechanism from observation data and flow property. (2) We proposed the new method of estimating the currents due to wind in the long-time projection of geographical change, and confirmed the improvements of degree of projection reproducibility.