The First Video Witness of Coastal Boulder Displacements Recorded during the Impact of Medicane “Zorbas” on Southeastern Sicily
Over the last few years, several authors have presented contrasting models to describe the response of boulders to extreme waves, but the absence of direct observation of movements has hindered the evaluation of these models. The recent development of online video-sharing platforms in coastal settin...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-05-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/12/5/1497 |
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| author | Giovanni Scicchitano Giovanni Scardino Sebastiano Tarascio Carmelo Monaco Giovanni Barracane Giuseppe Locuratolo Maurilio Milella Arcangelo Piscitelli Gianfranco Mazza Giuseppe Mastronuzzi |
| author_facet | Giovanni Scicchitano Giovanni Scardino Sebastiano Tarascio Carmelo Monaco Giovanni Barracane Giuseppe Locuratolo Maurilio Milella Arcangelo Piscitelli Gianfranco Mazza Giuseppe Mastronuzzi |
| author_sort | Giovanni Scicchitano |
| collection | DOAJ |
| description | Over the last few years, several authors have presented contrasting models to describe the response of boulders to extreme waves, but the absence of direct observation of movements has hindered the evaluation of these models. The recent development of online video-sharing platforms in coastal settings has provided the opportunity to monitor the evolution of rocky coastlines during storm events. In September 2018, a surveillance camera of the Marine Protected Area of Plemmirio recorded the movement of several boulders along the coast of Maddalena Peninsula (Siracusa, Southeastern Sicily) during the landfall of the Mediterranean tropical-like cyclone (Medicane) Zorbas. Unmanned autonomous vehicle (UAV) photogrammetric and terrestrial laser scanner (TLS) surveys were performed to reconstruct immersive virtual scenarios to geometrically analyze the boulder displacements recorded in the video. Analyses highlighted that the displacements occurred when the boulders were submerged as a result of the impact of multiple small waves rather than due to a single large wave. Comparison between flow velocities obtained by videos and calculated through relationships showed a strong overestimation of the models, suggesting that values of flow density and lift coefficient used in literature are underestimated. |
| first_indexed | 2024-03-10T19:38:13Z |
| format | Article |
| id | doaj.art-fbabc628f59d4b6d8c92d9b9de94c1dd |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-10T19:38:13Z |
| publishDate | 2020-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-fbabc628f59d4b6d8c92d9b9de94c1dd2023-11-20T01:31:42ZengMDPI AGWater2073-44412020-05-01125149710.3390/w12051497The First Video Witness of Coastal Boulder Displacements Recorded during the Impact of Medicane “Zorbas” on Southeastern SicilyGiovanni Scicchitano0Giovanni Scardino1Sebastiano Tarascio2Carmelo Monaco3Giovanni Barracane4Giuseppe Locuratolo5Maurilio Milella6Arcangelo Piscitelli7Gianfranco Mazza8Giuseppe Mastronuzzi9Studio Geologi Associati T.S.T.–Via Etnea n.169, 95030 Pedara, ItalyDipartimento di Scienze della Terra e Geoambientali, Università degli Studi di Bari Aldo Moro, 70121 Bari, ItalyStudio Geologi Associati T.S.T.–Via Etnea n.169, 95030 Pedara, ItalyDipartimento di Scienze Biologiche, Geologiche e Ambientali, Università degli Studi di Catania, 95129 Catania, ItalyEnvironmental Surveys S.r.l. Academic Spin-Off Università degli Studi di Bari Aldo Moro, 74121 Taranto, ItalyEnvironmental Surveys S.r.l. Academic Spin-Off Università degli Studi di Bari Aldo Moro, 74121 Taranto, ItalyEnvironmental Surveys S.r.l. Academic Spin-Off Università degli Studi di Bari Aldo Moro, 74121 Taranto, ItalyEnvironmental Surveys S.r.l. Academic Spin-Off Università degli Studi di Bari Aldo Moro, 74121 Taranto, ItalyArea Marina Protetta del Plemmirio, 96100 Siracusa, ItalyDipartimento di Scienze della Terra e Geoambientali, Università degli Studi di Bari Aldo Moro, 70121 Bari, ItalyOver the last few years, several authors have presented contrasting models to describe the response of boulders to extreme waves, but the absence of direct observation of movements has hindered the evaluation of these models. The recent development of online video-sharing platforms in coastal settings has provided the opportunity to monitor the evolution of rocky coastlines during storm events. In September 2018, a surveillance camera of the Marine Protected Area of Plemmirio recorded the movement of several boulders along the coast of Maddalena Peninsula (Siracusa, Southeastern Sicily) during the landfall of the Mediterranean tropical-like cyclone (Medicane) Zorbas. Unmanned autonomous vehicle (UAV) photogrammetric and terrestrial laser scanner (TLS) surveys were performed to reconstruct immersive virtual scenarios to geometrically analyze the boulder displacements recorded in the video. Analyses highlighted that the displacements occurred when the boulders were submerged as a result of the impact of multiple small waves rather than due to a single large wave. Comparison between flow velocities obtained by videos and calculated through relationships showed a strong overestimation of the models, suggesting that values of flow density and lift coefficient used in literature are underestimated.https://www.mdpi.com/2073-4441/12/5/1497bouldersMedicaneflowUAVwaves |
| spellingShingle | Giovanni Scicchitano Giovanni Scardino Sebastiano Tarascio Carmelo Monaco Giovanni Barracane Giuseppe Locuratolo Maurilio Milella Arcangelo Piscitelli Gianfranco Mazza Giuseppe Mastronuzzi The First Video Witness of Coastal Boulder Displacements Recorded during the Impact of Medicane “Zorbas” on Southeastern Sicily Water boulders Medicane flow UAV waves |
| title | The First Video Witness of Coastal Boulder Displacements Recorded during the Impact of Medicane “Zorbas” on Southeastern Sicily |
| title_full | The First Video Witness of Coastal Boulder Displacements Recorded during the Impact of Medicane “Zorbas” on Southeastern Sicily |
| title_fullStr | The First Video Witness of Coastal Boulder Displacements Recorded during the Impact of Medicane “Zorbas” on Southeastern Sicily |
| title_full_unstemmed | The First Video Witness of Coastal Boulder Displacements Recorded during the Impact of Medicane “Zorbas” on Southeastern Sicily |
| title_short | The First Video Witness of Coastal Boulder Displacements Recorded during the Impact of Medicane “Zorbas” on Southeastern Sicily |
| title_sort | first video witness of coastal boulder displacements recorded during the impact of medicane zorbas on southeastern sicily |
| topic | boulders Medicane flow UAV waves |
| url | https://www.mdpi.com/2073-4441/12/5/1497 |
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