抄録
Taking the Fuji River which is the major source of sand to the Fuji coast as an example, the sand deposition caused by floods was investigated using the Narrow-Multi Beam surveys as a fundamental study of the comprehensive management of sand movement. During the observation period in 2011, three large floods with discharges of 3,340, 5,985 and 13,319 m3/s occurred during Typhoon 6, T12 and T15, respectively. Approximately 4×105 m3 of sand was found to be supplied to the river mouth in each flood.
