Author(s)

H. Gotoh, M. Takezawa & S. Tomaki

Abstract

This study presents the characteristics of cross-sectional beach topographical features facing the Pacific Ocean, the Japan Sea, and the Ohotsuku Sea around the island of Hokkaido, Japan. Generally, given the numerous phenomena affecting both alongshore and offshore sediment transport, it is difficult to systematically characterize changes in the topography of coastal features. Nonetheless, the construction of maritime structures requires that a method for expressing complex beach topographies be developed. It is therefore necessary to develop an integrated quantitative methodology to characterize coastal topography. In this study, we have attempted to clarify the cross-sectional topographic characteristics of beaches using survey data. In addition, differences in the characteristics of the coastlines facing the Pacific Ocean, the Japan Sea, and the Ohotsuku Sea in Hokkaido are presented, and an attempt is made to express complex beach topography using fractals. The values calculated for the fractal dimension provide evidence for the existence of self-similarity among the beach topographies examined. Keywords: cross-sectional beach topography, bar, stable point, self-similarity, fractal dimension. 1 Introduction The island of Hokkaido is surrounded by the Pacific Ocean, the Japan Sea, and the Ohotsuku Sea (Figure 1). The coastline of Hokkaido is approximately 2767

Keywords

cross-sectional beach topography, bar, stable point, self-similarity, fractal dimension.