AFFINITY OF SAND COLOR INDEX IN RIVERS AND BEACHES AROUND THE KII CHANNEL

Abstract

 In this study, to examine the affinity of sand color in basins-scale, field observations, image analysis and hierarchical cluster analysis were conducted. Sampling sites were 29 rivers and 42 beaches around the Kii channel, Kinki region, Japan. It is confirmed the rare sand color such black can be tracking factor for sediment transport in this area. Moreover, it is clarified at least 5 color indexes are required to present the trend of sand color in this area.