Laboratory Observations of Swash Signatures Using Video Imagery
Swash motions are important for the design and assessment of beach protection projects, while the limitation of insightful observations in the swash zone still exists. An automatic identification method based on video imagery is developed to monitor and extract instantaneous swash motions in the lab...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-11-01
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| Series: | Journal of Marine Science and Engineering |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2077-1312/10/12/1833 |
| _version_ | 1797456906198974464 |
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| author | Haoye Yang Chi Zhang Jian Shi Xiangming Cao Yuan Li |
| author_facet | Haoye Yang Chi Zhang Jian Shi Xiangming Cao Yuan Li |
| author_sort | Haoye Yang |
| collection | DOAJ |
| description | Swash motions are important for the design and assessment of beach protection projects, while the limitation of insightful observations in the swash zone still exists. An automatic identification method based on video imagery is developed to monitor and extract instantaneous swash motions in the laboratory. The method increases video sampling frequency and improves image enhancement in identification. The improved method fits well with the results of the manual method. The incident band roll-off of the swash spectrum in the experiment is consistent with those observed on natural beaches. Results have shown that on the barred beach, water depths influence the peak frequency in the incident band and cause a multi-peak swash spectrum. A large incident wave period causes a low peak frequency but high peak energy in the swash spectrum. Large incident wave height results in wider energy coupling, making swash to be saturated and more energy in swash energy. The existence of a barred beach promotes swash energy transferring from a high frequency to a low frequency. |
| first_indexed | 2024-03-09T16:14:34Z |
| format | Article |
| id | doaj.art-1b7ed27aea284411888c4a7b78f3e3b4 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-09T16:14:34Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-1b7ed27aea284411888c4a7b78f3e3b42023-11-24T15:55:04ZengMDPI AGJournal of Marine Science and Engineering2077-13122022-11-011012183310.3390/jmse10121833Laboratory Observations of Swash Signatures Using Video ImageryHaoye Yang0Chi Zhang1Jian Shi2Xiangming Cao3Yuan Li4State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210024, ChinaState Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210024, ChinaGuangxi Key Laboratory of Beibu Gulf Marine Resources, Environment and Sustainable Development, Beihai 536000, ChinaGuangxi Key Laboratory of Beibu Gulf Marine Resources, Environment and Sustainable Development, Beihai 536000, ChinaState Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210024, ChinaSwash motions are important for the design and assessment of beach protection projects, while the limitation of insightful observations in the swash zone still exists. An automatic identification method based on video imagery is developed to monitor and extract instantaneous swash motions in the laboratory. The method increases video sampling frequency and improves image enhancement in identification. The improved method fits well with the results of the manual method. The incident band roll-off of the swash spectrum in the experiment is consistent with those observed on natural beaches. Results have shown that on the barred beach, water depths influence the peak frequency in the incident band and cause a multi-peak swash spectrum. A large incident wave period causes a low peak frequency but high peak energy in the swash spectrum. Large incident wave height results in wider energy coupling, making swash to be saturated and more energy in swash energy. The existence of a barred beach promotes swash energy transferring from a high frequency to a low frequency.https://www.mdpi.com/2077-1312/10/12/1833swash motionswavesvideo imageryswash spectrum |
| spellingShingle | Haoye Yang Chi Zhang Jian Shi Xiangming Cao Yuan Li Laboratory Observations of Swash Signatures Using Video Imagery Journal of Marine Science and Engineering swash motions waves video imagery swash spectrum |
| title | Laboratory Observations of Swash Signatures Using Video Imagery |
| title_full | Laboratory Observations of Swash Signatures Using Video Imagery |
| title_fullStr | Laboratory Observations of Swash Signatures Using Video Imagery |
| title_full_unstemmed | Laboratory Observations of Swash Signatures Using Video Imagery |
| title_short | Laboratory Observations of Swash Signatures Using Video Imagery |
| title_sort | laboratory observations of swash signatures using video imagery |
| topic | swash motions waves video imagery swash spectrum |
| url | https://www.mdpi.com/2077-1312/10/12/1833 |
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