Boulder coastal deposits at Favignana Island rocky coast (Sicily, Italy): Litho-structural and hydrodynamic control

Pepe, Fabrizio; Corradino, Marta; Parrino, Nicolò; Besio, Giovanni; Presti, Valeria Lo; Renda, Pietro; Calcagnile, Lucio; Quarta, Gianluca; Sulli, Attilio; Antonioli, Fabrizio

doi:10.1016/j.geomorph.2017.11.017

Cited by 33 publications

(41 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The equations have been shown to return unreliable results when applied to known storm or tsunami deposits, in particular underestimating storm wave power (e.g., Bourgeois and MacInnes, 2010;Switzer and Burston, 2010;Gandhi et al, 2017;Piscitelli et al, 2017). Despite these cautions, however, the Nott Approach continues to be applied for waveheight hindcasting (e.g., Vacchi et al, 2012;Mottershead et al, 2014;Biolchi et al, 2016;Boulton and Whitworth, 2017;Deguara and Gauci, 2017;Dewey and Ryan, 2017;Pepe et al, 2018;Kennedy et al, 2019;Roig-Munar et al, 2019). In consequence, the conversation about CBD is dominated by interpretations that, at best, are based on flawed methodology and, at worst, may be incorrect.…”

Section: Introductionmentioning

confidence: 99%

Systematic Review Shows That Work Done by Storm Waves Can Be Misinterpreted as Tsunami-Related Because Commonly Used Hydrodynamic Equations Are Flawed

et al. 2020

View full text Add to dashboard Cite

Cox et al. Boulder Deposits and Storm Waves during storms and should therefore be re-evaluated. This is especially important for CBD that have been incorporated into long-term coastal risk assessments, which are compromised if the CBD are misinterpreted. CBD dynamics can be better determined from a combination of detailed field measurements, modeling, and experiments. A clearer understanding of emplacement mechanisms will result in more reliable hazard analysis.

show abstract

Section: Introductionmentioning

confidence: 99%

Systematic Review Shows That Work Done by Storm Waves Can Be Misinterpreted as Tsunami-Related Because Commonly Used Hydrodynamic Equations Are Flawed

et al. 2020

View full text Add to dashboard Cite

show abstract

“…It has been documented that waves associated with stormy events and major tsunami events can generate a force strong enough to detach boulders from the ground and transport them along the shore. Despite boulder motion being mostly attributed to tsunamogenic activities in the literature, several authors have recently proven that the impact of storm waves is, in fact, the primary mechanism for boulder detachment and transport [3][4][5][6][7][8][9]. Moreover, at higher latitudes, Orviku et al [10] explained how the decomposition of sea ice and its drifting onshore can transport and accumulate boulders over 1 m in diameter, especially during the spring after ice melting.…”

Section: Introductionmentioning

confidence: 99%

Impact of the October 2018 Storm Vaia on Coastal Boulders in the Northern Adriatic Sea

Biolchi

Denamiel

Devoto

et al. 2019

Water

View full text Add to dashboard Cite

Boulder detachment from the seafloor and subsequent transport and accumulation along rocky coasts is a complex geomorphological process that requires a deep understanding of submarine and onshore environments. This process is especially interesting in semi-enclosed shallow basins characterized by extreme storms, but without a significant tsunami record. Moreover, the response of boulder deposits located close to the coast to severe storms remains, in terms of accurate displacement measurement, limited due to the need to acquire long-term data such as ongoing monitoring datasets and repeated field surveys. We present a multidisciplinary study that includes inland and submarine surveys carried out to monitor and accurately quantify the recent displacement of coastal boulders accumulated on the southernmost coast of the Premantura (Kamenjak) Promontory (Croatia, northern Adriatic Sea). We identified recent boulder movements using unmanned aerial vehicle digital photogrammetry (UAV-DP). Fourteen boulders were moved by the waves generated by a severe storm, named Vaia, which occurred on 29 October 2018. This storm struck Northeast Italy and the Istrian coasts with its full force. We have reproduced the storm-generated waves using unstructured wave model Simulating WAves Nearshore (SWAN), with a significant wave height of 6.2 m in front of the boulder deposit area. These simulated waves are considered to have a return period of 20 to 30 years. In addition to the aerial survey, an underwater photogrammetric survey was carried out in order to create a three-dimensional (3D) model of the seabed and identify the submarine landforms associated with boulder detachment. The survey highlighted that most of the holes can be considered potholes, while only one detachment shape was identified. The latter is not related to storm Vaia, but to a previous storm. Two boulders are lying on the seabed and the underwater surveys highlighted that these boulders may be beached during future storms. Thus, this is an interesting example of active erosion of the rocky coast in a geologically, geomorphologically, and oceanologically predisposed locality.

show abstract

“…Presumably, their destruction by wave abrasion and weathering leads to megaclast creation; it cannot be excluded that some megaclasts were formed as a result of slope collapse and subsequent downslope The Mediterranean is a 'classical' region for studies of coastal megaclasts and boulder deposits [9][10][11][12][13]. Particularly, megaclast accumulations have been reported from the Western Mediterranean continental and island coasts [66][67][68]. However, Ponza Island is of special importance because of two reasons.…”

Section: Example 3: Wetar Island (Indonesia; Banda Sea)mentioning

confidence: 99%

Finding Coastal Megaclast Deposits: A Virtual Perspective

Ruban

2020

JMSE

View full text Add to dashboard Cite

Coastal megaclast deposits are dominated by detrital particles larger than 1 m in size. These attract significant attention of modern researchers because of the needs of sedimentary rock nomenclature development and interpretation of storm and tsunami signatures on seashores. If so, finding localities that exhibit coastal megaclast deposits is an important task. Field studies do not offer a quick solution, and, thus, remote sensing tools have to be addressed. The application of the Google Earth Engine has permitted to find four new localities, namely Hondarribia in northern Spain (Biscay Bay), the Ponza Island in Italy (Tyrrhenian Sea), the Wetar Island in eastern Indonesia (Banda Sea), and the Humboldt o Coredo Bay at the Colombia/Panama border (eastern Pacific). In these localities, coastal megaclast deposits consisting of blocks (1–10 m in size) and some megablocks (>10 m in size) are delineated and preliminary described in regard to the dominant size of particles, package density, mode of occurrence, etc. The limitations of such virtual surveys of coastal megaclast deposits are linked to an insufficiently high resolution of satellite images, as well as ‘masking’ effects of vegetation cover and cliff shadows. However, these limitations do not diminish the importance of the Google Earth Engine for finding these deposits. Consideration of some tourism-related information, including photos captured by tourists and bouldering catalogues, facilitates search for promising areas for subsequent virtual surveying of megaclast distribution. It is also established that the Google Earth Engine permits quantitative analysis of composition of coastal megaclast deposits in some areas, as well as to register decade-long dynamics or stability of these deposits, which is important to interpret their origin. The current opportunities for automatic detection of coastal megaclast deposits seem to be restricted.

show abstract

Boulder coastal deposits at Favignana Island rocky coast (Sicily, Italy): Litho-structural and hydrodynamic control

Cited by 33 publications

References 48 publications

Systematic Review Shows That Work Done by Storm Waves Can Be Misinterpreted as Tsunami-Related Because Commonly Used Hydrodynamic Equations Are Flawed

Systematic Review Shows That Work Done by Storm Waves Can Be Misinterpreted as Tsunami-Related Because Commonly Used Hydrodynamic Equations Are Flawed

Impact of the October 2018 Storm Vaia on Coastal Boulders in the Northern Adriatic Sea

Finding Coastal Megaclast Deposits: A Virtual Perspective

Contact Info

Product

Resources

About