Abstract
The sediment color contains useful information such as geographical features of drainage basins. In this study, to estimate the possibility of the sediment transport between beaches and rivers, statistical analysis was conducted by using sediment color. Study site were 16 beaches and 12 rivers in Toban region, Hyogo prefecture, Japan. Toban coast has been faced to serious shore erosion and has taken strong measures by government. To evaluate the effectiveness of countermeasures, it is necessary to grasp the sediment dynamics. In this study, the principal component analysis was applied for image of the sediment on the surface ground at each investigation site. It is clarified at least 5 primary components are required to reproduce the sediment color composition at each field and the existence of sediment transport which coincides with the offshore current in this region was confirmed.
