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김권수(Gweon-su Kim),유하상(Ha-sang Ryu),김석천(Seok-cheon Kim),김맹진(Mang-Jin Kim) 한국연안방재학회 2020 한국연안방재학회지 Vol.7 No.4
The coastal areas of South Korea are experiencing changes in erosion and sedimentation due to the irregular movements of silt and sediment in rivers and coasts. Erosion is particularly significant on the east coast due to changes in wave characteristics caused by the construction of artificial structures. Coastal erosion can be mitigated by evaluating coastal sediment budget based on long-term changes in wave characteristics and climate and by establishing a clear coastal management system accordingly. We investigated the changes in the movement of sand by waves, by performing an experiment to estimate the amount of sediment movement for Bongpo Beach that has been categorized as “severe” in the coastal erosion status data of the Ministry of Oceans and Fisheries(Ministry of Oceans and Fisheries, 2019). 54 representative waves were generated with input reduction tools. Each representative wave was used as input data for the Delft3d flow model and the SWAN wave model. And the final sedimentation results were calculated by considering the ratio corresponding to each representative wave. Finally, the four submerged breakwater and the one groin, which are currently installed in front of Bongpo, were simulated to analyze the changes in sedimentation before and after the structure.
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