離岸堤周辺の波高変化と汀線変化に関する研究

抄録

Detached breakwaters have been used as coastal protection structures. In sandy beaches, group of breakwaters that have openings are constructed. According to the analysis of the bottom sounding, it is known that tombolos are formed behind detached breakwaters. And local scour will occur in an opening or offshore after the detached breakwaters construction. It is difficult to estimate the amount of sand trapping effect because the shoreline data is few. Thus the purpose of this study is to research the relationship wave field and shoreline profiles. The results of this research are follows. 1) If a rate of wave height decreases, erosion will occur. 2) Some detached breakwaters are not applied it. Even if rate of wave height does not change, erosion will occur.