Observation of Rapid Seabed Erosion Near Closure Depth During a Storm Period at Hujeong Beach, South Korea
Abstract We report extraordinary seabed erosion that occurred at a depth of ~8.3 m at Hujeong Beach, South Korea. The seabed was eroded for 0.7 m during a ~2.3‐day period under storm conditions. The maximum significant wave height was ~3.8 m, which was unexpected considering the traditional closure...
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| Format: | Article |
| Language: | English |
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Wiley
2019-08-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2019GL083910 |
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| author | Jong Dae Do Jae‐Youll Jin Weon Mu Jeong Yeon S. Chang |
| author_facet | Jong Dae Do Jae‐Youll Jin Weon Mu Jeong Yeon S. Chang |
| author_sort | Jong Dae Do |
| collection | DOAJ |
| description | Abstract We report extraordinary seabed erosion that occurred at a depth of ~8.3 m at Hujeong Beach, South Korea. The seabed was eroded for 0.7 m during a ~2.3‐day period under storm conditions. The maximum significant wave height was ~3.8 m, which was unexpected considering the traditional closure depth concept. Four storm events were recorded within 36 day of the experimental period, but the severe erosion only occurred during the first storm. The erosion started when the nearbed flow velocity rapidly increased to reach its maximum at 0.27 m/s, and it continued until this velocity remained at its maximum. Additional factors responsible for the unanticipated erosion process were the current and wave skewness. The erosion was facilitated when the current direction was actively changing and the magnitude of positive skewness increased during the storm period. These factors are likely to have intensified the nearbed flow turbulence and bed shear stress. |
| format | Article |
| id | doaj-art-cf01cde9c43f45a5824cc10d9e79f407 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2019-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-cf01cde9c43f45a5824cc10d9e79f4072025-08-20T02:24:35ZengWileyGeophysical Research Letters0094-82761944-80072019-08-0146169804981210.1029/2019GL083910Observation of Rapid Seabed Erosion Near Closure Depth During a Storm Period at Hujeong Beach, South KoreaJong Dae Do0Jae‐Youll Jin1Weon Mu Jeong2Yeon S. Chang3Coastal Morphodynamics Team Korea Institute of Ocean Science and Technology Busan South KoreaCoastal Morphodynamics Team Korea Institute of Ocean Science and Technology Busan South KoreaCoastal and Ocean Engineering Division Korea Institute of Ocean Science and Technology Busan South KoreaCoastal and Ocean Engineering Division Korea Institute of Ocean Science and Technology Busan South KoreaAbstract We report extraordinary seabed erosion that occurred at a depth of ~8.3 m at Hujeong Beach, South Korea. The seabed was eroded for 0.7 m during a ~2.3‐day period under storm conditions. The maximum significant wave height was ~3.8 m, which was unexpected considering the traditional closure depth concept. Four storm events were recorded within 36 day of the experimental period, but the severe erosion only occurred during the first storm. The erosion started when the nearbed flow velocity rapidly increased to reach its maximum at 0.27 m/s, and it continued until this velocity remained at its maximum. Additional factors responsible for the unanticipated erosion process were the current and wave skewness. The erosion was facilitated when the current direction was actively changing and the magnitude of positive skewness increased during the storm period. These factors are likely to have intensified the nearbed flow turbulence and bed shear stress.https://doi.org/10.1029/2019GL083910coastal erosionwave skewnessdepth of closureseabed elevation changeacoustic sensors |
| spellingShingle | Jong Dae Do Jae‐Youll Jin Weon Mu Jeong Yeon S. Chang Observation of Rapid Seabed Erosion Near Closure Depth During a Storm Period at Hujeong Beach, South Korea Geophysical Research Letters coastal erosion wave skewness depth of closure seabed elevation change acoustic sensors |
| title | Observation of Rapid Seabed Erosion Near Closure Depth During a Storm Period at Hujeong Beach, South Korea |
| title_full | Observation of Rapid Seabed Erosion Near Closure Depth During a Storm Period at Hujeong Beach, South Korea |
| title_fullStr | Observation of Rapid Seabed Erosion Near Closure Depth During a Storm Period at Hujeong Beach, South Korea |
| title_full_unstemmed | Observation of Rapid Seabed Erosion Near Closure Depth During a Storm Period at Hujeong Beach, South Korea |
| title_short | Observation of Rapid Seabed Erosion Near Closure Depth During a Storm Period at Hujeong Beach, South Korea |
| title_sort | observation of rapid seabed erosion near closure depth during a storm period at hujeong beach south korea |
| topic | coastal erosion wave skewness depth of closure seabed elevation change acoustic sensors |
| url | https://doi.org/10.1029/2019GL083910 |
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