Video Monitoring of Shoreline Positions in Hujeong Beach, Korea
Shoreline processes observed by a video monitoring system were investigated under different wave conditions. A 30 m-high tower equipped with video cameras was constructed in Hujeong Beach, South Korea, where coastal erosion was suspected to occur. Two-year shoreline data since December 2016 showed t...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-11-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/9/23/4984 |
| _version_ | 1828811488619397120 |
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| author | Yeon S. Chang Jae-Youll Jin Weon Mu Jeong Chang Hwan Kim Jong-Dae Do |
| author_facet | Yeon S. Chang Jae-Youll Jin Weon Mu Jeong Chang Hwan Kim Jong-Dae Do |
| author_sort | Yeon S. Chang |
| collection | DOAJ |
| description | Shoreline processes observed by a video monitoring system were investigated under different wave conditions. A 30 m-high tower equipped with video cameras was constructed in Hujeong Beach, South Korea, where coastal erosion was suspected to occur. Two-year shoreline data since December 2016 showed that beach area, Ab, has decreased, but periods of rapid increase in Ab were also observed. Shoreline change was closely related to the wave propagation directions and bottom topography. Ab increased when waves approached the shore obliquely, whereas it decreased when they approached in a normal direction. The shoreline became undulated when Ab increased, while it became flatter when Ab decreased. The undulation process was influenced by nearshore bedforms because the shoreline protruded in the lee area where underwater rocks or nearshore sandbars actively developed, with a sheltering effect on waves. Specifically, the locations of shoreline accretion corresponded to the locations where the sandbar horns (location where a crescentic sandbar protrudes toward the shore) developed, confirming the out-of-phase coupling between sandbars and shoreline. When waves with higher energy approached normal to the shore, the sheltering effect of sandbars and underwater rocks became weaker and offshore sediment transport occurred uniformly along the coast, resulting in flatter shorelines. |
| first_indexed | 2024-12-12T09:28:40Z |
| format | Article |
| id | doaj.art-e1dc193037a84eadbf124f401c3008bd |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-12T09:28:40Z |
| publishDate | 2019-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-e1dc193037a84eadbf124f401c3008bd2022-12-22T00:28:57ZengMDPI AGApplied Sciences2076-34172019-11-01923498410.3390/app9234984app9234984Video Monitoring of Shoreline Positions in Hujeong Beach, KoreaYeon S. Chang0Jae-Youll Jin1Weon Mu Jeong2Chang Hwan Kim3Jong-Dae Do4Coastal Development and Ocean Energy Research Center, Korea Institute of Ocean Science and Technology, Busan, 49111, KoreaCoastal Morphodynamics Team, Korea Institute of Ocean Science and Technology, Busan, 49111, KoreaMaritime ICT R & D Center, Korea Institute of Ocean Science and Technology, Busan, 49111, KoreaDokdo Research Center, Korea Institute of Ocean Science and Technology, Busan, 49111, KoreaCoastal Morphodynamics Team, Korea Institute of Ocean Science and Technology, Busan, 49111, KoreaShoreline processes observed by a video monitoring system were investigated under different wave conditions. A 30 m-high tower equipped with video cameras was constructed in Hujeong Beach, South Korea, where coastal erosion was suspected to occur. Two-year shoreline data since December 2016 showed that beach area, Ab, has decreased, but periods of rapid increase in Ab were also observed. Shoreline change was closely related to the wave propagation directions and bottom topography. Ab increased when waves approached the shore obliquely, whereas it decreased when they approached in a normal direction. The shoreline became undulated when Ab increased, while it became flatter when Ab decreased. The undulation process was influenced by nearshore bedforms because the shoreline protruded in the lee area where underwater rocks or nearshore sandbars actively developed, with a sheltering effect on waves. Specifically, the locations of shoreline accretion corresponded to the locations where the sandbar horns (location where a crescentic sandbar protrudes toward the shore) developed, confirming the out-of-phase coupling between sandbars and shoreline. When waves with higher energy approached normal to the shore, the sheltering effect of sandbars and underwater rocks became weaker and offshore sediment transport occurred uniformly along the coast, resulting in flatter shorelines.https://www.mdpi.com/2076-3417/9/23/4984video monitoringcoastal erosionshoreline changenearshore sandbars |
| spellingShingle | Yeon S. Chang Jae-Youll Jin Weon Mu Jeong Chang Hwan Kim Jong-Dae Do Video Monitoring of Shoreline Positions in Hujeong Beach, Korea Applied Sciences video monitoring coastal erosion shoreline change nearshore sandbars |
| title | Video Monitoring of Shoreline Positions in Hujeong Beach, Korea |
| title_full | Video Monitoring of Shoreline Positions in Hujeong Beach, Korea |
| title_fullStr | Video Monitoring of Shoreline Positions in Hujeong Beach, Korea |
| title_full_unstemmed | Video Monitoring of Shoreline Positions in Hujeong Beach, Korea |
| title_short | Video Monitoring of Shoreline Positions in Hujeong Beach, Korea |
| title_sort | video monitoring of shoreline positions in hujeong beach korea |
| topic | video monitoring coastal erosion shoreline change nearshore sandbars |
| url | https://www.mdpi.com/2076-3417/9/23/4984 |
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