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The Research of Beach Deformation after Construction of the Jetties
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 Title & Authors
The Research of Beach Deformation after Construction of the Jetties
Park, Sang-Kil; Han, Chong-Soo; Roh, Tae-Young; Park, O-Young; Ahn, Ik-Seong; Lee, Ji-Hun;
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This research was described the prevention of coastal topographical change and sediment diffusive concentration incoming from small estuary after construction jetties. This structure is constructed to decrease sediment deposition incoming from the upstream river due to the urbanization and industrial development and to minimize effects on the coastal ecosystem. The physical modeling and numerical modeling for waves were conducted to analyze the configuration of Imrang sand beach deformation without and with construction of jetty. The specification of the installed jetty, which is able to control sedimentation concentration was decided based on the prediction of the Imrang beach area changes by space and time. As a result, the jetties constructed in the estuary retarded the rate of sand sediment, so that the effect area of sand sedimentation was obviously decreased. In addition, the measured field data indicated that the sediment deposition inside of dikes could be controlled and the right side area of jetties could be preserved without sediment deposition.
Prevention of coastal topographical change;Distribution of wave height;Shoreline changes;
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