| Assessment of Water Piling-up behind a Submerged Breakwater during Storm Events |
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Donghwi Son, Jeseon Yoo, Mujong Kim |
| 단기 태·폭풍 기인 잠제 배후의 Piling-up 현상 평가 |
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손동휘, 유제선, 김무종 |
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| Abstract |
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It is generally known that submerged breakwaters can reduce the incoming wave energy without disturbing the beach scenery. However, a submerged breakwater is also able to cause a setup of the sea level in the protected area which is also called as water piling-up. Since the piling-up can result in longshore currents, sediment transports, and unexpected beach erosion, understanding about the piling-up process is required prior to designing the nearshore structures. In this study, the water piling-up behind a submerged breakwater is assessed in the time of storm events. For the study area, Anmok beach in Gyeonso-dong, Gangwon-do is selected. 1-year, 5-year, 10-year, and 50-year return-values were derived from Peaks-Over-Threshold(POT) method and those are applied as offshore boundary conditions for the numerical simulation. The numerical results of the piling-up were assessed with regard to the wave steepness and the height of the submerged breakwater. With increase of both significant wave height and the height of the submerged breakwater, the piling-up parameter is also increased which can lead to erosion of dry beach behind the structure. |
| Key Words:
Water piling-up; Submerged breakwaters; Wave steepness; XBeach; Anmok beach |
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