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| Titel |
Detailed rock failure susceptibility mapping in steep rocky coasts by means of non-contact geostructural surveys: the case study of the Tigullio Gulf (Eastern Liguria, Northern Italy) |
| VerfasserIn |
P. Vita, A. Cevasco, C. Cavallo |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 12, no. 4 ; Nr. 12, no. 4 (2012-04-10), S.867-880 |
| Datensatznummer |
250010688
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| Publikation (Nr.) |
 copernicus.org/nhess-12-867-2012.pdf |
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| Zusammenfassung |
In this study, an engineering geological analysis for the assessment of
the rock failure susceptibility of a high, steep, rocky coast was developed
by means of non-contact geostructural surveys. The methodology was applied
to a 6-km coastal cliff located in the Gulf of Tigullio (Northern Tyrrhenian
Sea) between Rapallo and Chiavari.
The method is based on the geostructural characterisation of outcropping
rock masses through meso- and macroscale stereoscopic analyses of digital
photos that were taken continuously from a known distance from the
coastline. The results of the method were verified through direct surveys of
accessible sample areas. The rock failure susceptibility of the coastal
sector was assessed by analysing the fundamental rock slope mechanisms of
instability and the results were implemented into a Geographic Information
System (GIS).
The proposed method is useful for rock failure susceptibility assessments in
high, steep, rocky coastal areas, where accessibility is limited due to
cliffs or steep slopes. Moreover, the method can be applied to private
properties or any other area where a complete and systematic analysis of
rock mass structural features cannot be achieved.
Compared to direct surveys and to other non-contact methods based on digital
terrestrial photogrammetry, the proposed procedure provided good quality
data of the structural features of the rock mass at a low cost. Therefore,
the method could be applied to similar coastal areas with a high risk of
rock failure occurrence. |
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