Photogrammetric Investigation of Storm-Induced Erosion Process on Sandy Beach Profile in Medium-Scale Flume
In this study, laboratory experiments were conducted to investigate the influence of changes in storm wave height and water level on beach response in a medium-scale wave flume. A schematic storm was simulated (rising, apex, and waning phases). A non-intrusive photogrammetric method was used to coll...
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MDPI AG
2024-03-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/12/3/518 |
| _version_ | 1797240432349937664 |
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| author | Jun Wang Bo Yang Bingchen Liang Zai-Jin You Zhenlu Wang Zhaowei Wang |
| author_facet | Jun Wang Bo Yang Bingchen Liang Zai-Jin You Zhenlu Wang Zhaowei Wang |
| author_sort | Jun Wang |
| collection | DOAJ |
| description | In this study, laboratory experiments were conducted to investigate the influence of changes in storm wave height and water level on beach response in a medium-scale wave flume. A schematic storm was simulated (rising, apex, and waning phases). A non-intrusive photogrammetric method was used to collect high-resolution and synchronous data regarding the free surface water elevation and bed level, from which shoreline location, sandbar position, cross-shore sediment transport rates, and nonlinear wave parameters were derived. The cross-shore sediment transport was in agreement with previous laboratory measurements, including the monotonous exchange from foreshore erosion to shoaling zone accretion in most stages of the storm simulation. The surf zone was the main region supplying sediment for beach morphology modification and sandbar generation. The degree of storm erosion was not completely determined by the largest wave height and water level or the cumulative wave power of the apex phase. The largest gradients of the wave parameter sequence change occurred in the rising phase, and this was the main factor generating efficient beachface erosion. It induced an increase in sandbar size, accompanied by the cross-shore motion of maximum velocity amplitude, more violent disturbances of wave nonlinearity, and increased surf zone erosion, with these factors increasing beach instability and leading to more severe storm erosion. The large wave height and water level resulted in shoreline retreat, with a more significant swash zone erosion under a higher runup. The offshore sediment transport turned toward the onshore direction as the original large sandbar deteriorated under the decreasing wave parameter sequence in the waning phase. |
| first_indexed | 2024-04-24T18:07:20Z |
| format | Article |
| id | doaj.art-b464bab424dd4a6ab64d369e7eb95a0e |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-04-24T18:07:20Z |
| publishDate | 2024-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-b464bab424dd4a6ab64d369e7eb95a0e2024-03-27T13:49:30ZengMDPI AGJournal of Marine Science and Engineering2077-13122024-03-0112351810.3390/jmse12030518Photogrammetric Investigation of Storm-Induced Erosion Process on Sandy Beach Profile in Medium-Scale FlumeJun Wang0Bo Yang1Bingchen Liang2Zai-Jin You3Zhenlu Wang4Zhaowei Wang5Centre for Ports and Marine Safety, Dalian Maritime University, Dalian 116024, ChinaCollege of Engineering, Ocean University of China, Qingdao 266100, ChinaCollege of Engineering, Ocean University of China, Qingdao 266100, ChinaCentre for Ports and Marine Safety, Dalian Maritime University, Dalian 116024, ChinaCollege of Engineering, Ocean University of China, Qingdao 266100, ChinaCentre for Ports and Marine Safety, Dalian Maritime University, Dalian 116024, ChinaIn this study, laboratory experiments were conducted to investigate the influence of changes in storm wave height and water level on beach response in a medium-scale wave flume. A schematic storm was simulated (rising, apex, and waning phases). A non-intrusive photogrammetric method was used to collect high-resolution and synchronous data regarding the free surface water elevation and bed level, from which shoreline location, sandbar position, cross-shore sediment transport rates, and nonlinear wave parameters were derived. The cross-shore sediment transport was in agreement with previous laboratory measurements, including the monotonous exchange from foreshore erosion to shoaling zone accretion in most stages of the storm simulation. The surf zone was the main region supplying sediment for beach morphology modification and sandbar generation. The degree of storm erosion was not completely determined by the largest wave height and water level or the cumulative wave power of the apex phase. The largest gradients of the wave parameter sequence change occurred in the rising phase, and this was the main factor generating efficient beachface erosion. It induced an increase in sandbar size, accompanied by the cross-shore motion of maximum velocity amplitude, more violent disturbances of wave nonlinearity, and increased surf zone erosion, with these factors increasing beach instability and leading to more severe storm erosion. The large wave height and water level resulted in shoreline retreat, with a more significant swash zone erosion under a higher runup. The offshore sediment transport turned toward the onshore direction as the original large sandbar deteriorated under the decreasing wave parameter sequence in the waning phase.https://www.mdpi.com/2077-1312/12/3/518laboratory experimentwave breakingwave parameter sequencestorm erosionsandbarcross-shore sediment transport |
| spellingShingle | Jun Wang Bo Yang Bingchen Liang Zai-Jin You Zhenlu Wang Zhaowei Wang Photogrammetric Investigation of Storm-Induced Erosion Process on Sandy Beach Profile in Medium-Scale Flume Journal of Marine Science and Engineering laboratory experiment wave breaking wave parameter sequence storm erosion sandbar cross-shore sediment transport |
| title | Photogrammetric Investigation of Storm-Induced Erosion Process on Sandy Beach Profile in Medium-Scale Flume |
| title_full | Photogrammetric Investigation of Storm-Induced Erosion Process on Sandy Beach Profile in Medium-Scale Flume |
| title_fullStr | Photogrammetric Investigation of Storm-Induced Erosion Process on Sandy Beach Profile in Medium-Scale Flume |
| title_full_unstemmed | Photogrammetric Investigation of Storm-Induced Erosion Process on Sandy Beach Profile in Medium-Scale Flume |
| title_short | Photogrammetric Investigation of Storm-Induced Erosion Process on Sandy Beach Profile in Medium-Scale Flume |
| title_sort | photogrammetric investigation of storm induced erosion process on sandy beach profile in medium scale flume |
| topic | laboratory experiment wave breaking wave parameter sequence storm erosion sandbar cross-shore sediment transport |
| url | https://www.mdpi.com/2077-1312/12/3/518 |
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