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Abstract

In recent years, coastal erosion has emerged as a nationwide problem. Toward comprehensive sediment management that promotes coastal conservation, the mechanism of wide-area sediment transport needs to be understood. Research on sea sand drift has thus far targeted relatively shallow sea areas, such as the breaker zone. For wide-area sediment management, however, study should be extended to include the role of grain size in sand drift and to include sand drift in deep-sea areas. As part of this research, an field survey was conducted in the Ishikari coastal wide-area in winter, when significant wide-area topographical changes occur. As a result of the field survey in the outer breaker zone, a large sediment transport was found.