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Article

The First Video Witness of Coastal Boulder Displacements Recorded during the Impact of Medicane “Zorbas” on Southeastern Sicily

1
Studio Geologi Associati T.S.T.–Via Etnea n.169, 95030 Pedara, Italy
2
Dipartimento di Scienze della Terra e Geoambientali, Università degli Studi di Bari Aldo Moro, 70121 Bari, Italy
3
Dipartimento di Scienze Biologiche, Geologiche e Ambientali, Università degli Studi di Catania, 95129 Catania, Italy
4
CRUST-Interuniversity Center for 3D Seismotectonics with Territorial Applications, 66100 Chieti Scalo, Italy
5
Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, 95131 Catania, Italy
6
Environmental Surveys S.r.l. Academic Spin-Off Università degli Studi di Bari Aldo Moro, 74121 Taranto, Italy
7
Area Marina Protetta del Plemmirio, 96100 Siracusa, Italy
*
Author to whom correspondence should be addressed.
Water 2020, 12(5), 1497; https://doi.org/10.3390/w12051497
Received: 4 May 2020 / Revised: 20 May 2020 / Accepted: 21 May 2020 / Published: 23 May 2020
(This article belongs to the Special Issue Relative Sea-Level Changes and their Impact on Coastal Zones)
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. View Full-Text
Keywords: boulders; Medicane; flow; UAV; waves boulders; Medicane; flow; UAV; waves
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MDPI and ACS Style

Scicchitano, G.; Scardino, G.; Tarascio, S.; Monaco, C.; Barracane, G.; Locuratolo, G.; Milella, M.; Piscitelli, A.; Mazza, G.; Mastronuzzi, G. The First Video Witness of Coastal Boulder Displacements Recorded during the Impact of Medicane “Zorbas” on Southeastern Sicily. Water 2020, 12, 1497. https://doi.org/10.3390/w12051497

AMA Style

Scicchitano G, Scardino G, Tarascio S, Monaco C, Barracane G, Locuratolo G, Milella M, Piscitelli A, Mazza G, Mastronuzzi G. The First Video Witness of Coastal Boulder Displacements Recorded during the Impact of Medicane “Zorbas” on Southeastern Sicily. Water. 2020; 12(5):1497. https://doi.org/10.3390/w12051497

Chicago/Turabian Style

Scicchitano, Giovanni, Giovanni Scardino, Sebastiano Tarascio, Carmelo Monaco, Giovanni Barracane, Giuseppe Locuratolo, Maurilio Milella, Arcangelo Piscitelli, Gianfranco Mazza, and Giuseppe Mastronuzzi. 2020. "The First Video Witness of Coastal Boulder Displacements Recorded during the Impact of Medicane “Zorbas” on Southeastern Sicily" Water 12, no. 5: 1497. https://doi.org/10.3390/w12051497

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