Abstract
In recent years, several field observations of wave set-up at a river mouth have been reported. From those results, it can be concluded that the height of wave set-up has a dependence on the morphology at a river entrance. However, quantitative relationship between the magnitude of wave set-up height and river mouth morphology has not been thoroughly clarified yet because of insufficient acquisition of river mouth morphology data. In this study, laboratory experiment, as well as theoretical discussions, is carried out to investigate quantitative relationship between wave set-up height and river mouth depth. Furthermore, detailed discussions are made for the relationship between wave set-up height and river mouth morphology at the Shiribetsu River mouth, where oblique photographs have been taken almost every week. Effectiveness of jetty construction is also investigated from the viewpoint of wave set-up height.
