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http://dx.doi.org/10.9765/KSCOE.2018.30.2.51

Analysis on the Reduction Effects of the Gravity Waves and Infra-Gravity Waves of Detached Submerged Breakwater by Field Monitoring  

Jeong, Weon-Mu (Coastal and Environmental Engineering Division, Korea Institute of Ocean Science & Technology)
Back, Jong-Dai (Coast and Ocean Technology Research Institute)
Choi, Hyukjin (Coast and Ocean Technology Research Institute)
Kim, Sang-Ik (Maritime Safety and Security Division, Korea Institute of Ocean Science & Technology)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.30, no.2, 2018 , pp. 51-60 More about this Journal
Abstract
This study was conducted to observe the effects of gravity and infra-gravity wave of detached submerged breakwater in the coast of Yeongnang-dong, Sokcho, as analyzing continuous wave data by performing field observations on the front area (W0) and rear area (W1, W2). Wave transmission coefficient ($K_t$) of submerged breakwater was analyzed in two parts, short-period wave (gravity wave) and infra-gravity wave. The wave energy reduction effect was analyzed and compared with the value of the design. In case of above wave height 2.0 m at the front area (W0) of the submerged breakwater, the short-period wave height at point W1 is reduced by about 65% and the short-period wave height at point W2 is reduced by about 59%. The depth of crest of submerged breakwater conducted in a sea area differs from the design, and the wave energy reduction effect is analyzed to be smaller than the design plan. The infra-gravity waves were amplified to 2.11 and 1.71 at the W1 and W2 points, respectively, and the wave height at W2 point was smaller than that at W1 point.
Keywords
field observations; wave transmission coefficient; gravity wave; infra-gravity wave; wave energy reduction;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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