2022 Volume 78 Issue 2 Pages I_109-I_114
On the Suruga coast, Typhoon Hagibis caused three-dimensional topographic changes near the embankment. The slope of the beach profile in the offshore direction became steeper and became more gradual as wave height increased. The slope of the beach profile after high waves was equal to the previous empirical equation. The slope of the coastal profile in the longshore direction was uniformly changed by high waves, but became steeper only on the north side in the later stage of the typhoon, resulting in a three-dimensional topographic change. The three-dimensional topographic changes was caused by the outflow of coastal vegetation, which caused a difference in elevation, and the development of a dominant longshore current.
