Wave Amplification at Harbor Entrance Due to Submerged Shoal

In this study, we identified the cause of the wave height amplification in the channel entrance and modified the configuration of the breakwater to improve the docking system in Daepo Harbor. We investigated the cause of the wave height amplification in the vicinity of channel entrance and obstruction elements in the channel entrance through a bathymetric survey of precision using a multi beam echo sounding (MBES), side scan sonar (SSS), sub marine photography and wave observation together with numerical simulation. In the field observation, wave heights were amplified due to the submerged shoal area and it was measured by pressure-type wave gauges. Moreover, the numerical simulation also indicates the wave height amplification on the submerged shoal. In addition, the verified numerical model was used to suggest a countermeasure to minimize the wave height amplification by rearranging the breakwater configuration. Currently, we are monitoring wave height amplification continuously. Moreover, hydraulic model tests for various cases are being carried out to elucidate the characteristics of the wave height amplification around the submerged shoal area and to develop a new support system for ship movement in the harbor. The results of this study are expected to contribute to the safety of ship movement in the vicinity of submerged shoal.