Channel Infilling at Harbor Entrance in Tagonoura Port and Effects of Spot Dredging

Abstract

At harbor entrance in Tagonoura Port, channel infilling has continuously occurred so far, and the maintenance dredging has been usually carried out. In order to reduce the infilling rate, implementation of spot dredging has been proposed and the field experiment has been carried out since August, 2012. This study intends to clarify the mechanism of channel infilling and effectiveness of the spot dredging works. By analyzing the bathymetric survey data and wave observation data, the effectiveness of spot dredging works were confirmed. Numerical model experiments have been also conducted to examine effective arrangement of the spot dredging.