Author(s): K. Yokoyama; Y. Kaneko; K. Yamamoto
Linked Author(s): Katsuhide Yokoyama
Keywords: No Keywords
Abstract: The erosion of cohesive sediment in an estuarine channel was determined using thermometers. Sixteen water temperature loggers were attached to a fishing rod; fifteen of these were immersed in a muddy bed, while one was placed in river water. The erosion process during the flood period was successfully evaluated by the difference between temperatures of the flood water and mud. A significant relationship was established between the determined erosion rate and the shear velocity by considering the water content. This correlation differed from that observed while using experimental mud. Additionally, though the water content and particle diameter of both the samples were identical, the strength of the bed sediment in an estuarine channel was detected to be 5times that of experimental clay. These results indicate that the erodibility of fine sediment was affected by the degree of consolidation during sedimentation.
Year: 2009