Landslide inventory and rockfall risk assessment of a strategic urban area (Palermo, Sicily)

Cafiso, Fabio; Cappadonia, Chiara

doi:10.3301/rol.2019.42

Cited by 11 publications

(14 citation statements)

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“…Fed by rock and debris falls/ toppling/tumbles and composed of scree and landslide accumulations, large talus slopes are located at the foot of the main steep mountain slopes in carbonate rocks. Many of these talus slopes were urbanized in recent decades, representing today areas with high landslide risk (Cafiso & Cappadonia, 2019;cf. Brandolini et al, 2007;Galve et al, 2016).…”

Section: Gravitational Landformsmentioning

confidence: 99%

Geomorphology of the urban area of Palermo (Italy)

et al. 2020

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The results of a geomorphological study carried out in the urban area of Palermo are summarized in a thematic map. Field survey, analysis of aerial photographs and topographic maps, consultation of historical documents and maps, stratigraphic and topographic reconstruction from numerous wells and subsoil data, and bibliographic search were performed, in order to display the geomorphological changes produced by man over time in a densely populated area and to define the Anthropocene of the study area. Palermo town rises along large marine terrace surfaces cut by small river valleys and bordered by wide degraded and abandoned coastal cliffs. Over the last 2700 years, this area was affected by remarkable man-made changes to topographic surface and underground, exposing large areas of the city to hydraulic, sinkhole, and landslide risks, and increasing the levels of seismic susceptibility. In light of these results, the produced map is useful for urban planning studies.

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Section: Gravitational Landformsmentioning

confidence: 99%

Geomorphology of the urban area of Palermo (Italy)

et al. 2020

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“…The rock cliffs in the study area contains complex bedding planes geometries, several sets of discontinuities and are characterized by intense karst processes; it is possible, therefore, to observe for each sector of the mount, various typologies of rockfall that can be classified, according to Hoek & Bray, 1981, as plane failure, wedge failure, toppling and rock-fall. When the rock slopes are characterized by a high fracture densities forming numerous unstable rock blocks, the most common models of failures are the rock-fall ( Figure 4); in particular, the rockfall failure happens where there is a recess of the rocks caused by karstic phenomena or precedent collapses (Cafiso et al, 2020;Cafiso & Cappadonia, 2019). When, instead, rock masses are affected by sub-horizontal bedding planes and sub-vertical discontinuities isolating unstable rock blocks, phenomena like rockfall and toppling occur.…”

Section: Study Areamentioning

confidence: 99%

“…The sliding phenomena (planar sliding or wedge failure) occur along discontinuities where the strike of the sliding plane is close to the strike of the topographical slope and the dip of the sliding plane is less than the dip of the slope ( Figure 6). To mitigate the rockfall risk, over the years, several works were carried out, including active interventions and passive defence works (Cafiso & Cappadonia, 2019). In order to determine geo-mechanical characteristics of the rock masses, detailed geological and geostructural surveys along horizontal and vertical scanlines have been carried out.…”

Section: Study Areamentioning

confidence: 99%

“…The rock block dimensions are the result of the intersection of the discontinuity sets, but also from the spacing of the individual sets. On the basis of the landslides inventory (Cafiso & Cappadonia, 2019) and the field surveys it was found that the sizes of the collapsed and instable blocks vary from fractions to tens of cubic metres (Figure 8).…”

Section: Study Areamentioning

confidence: 99%

“…The Mount Pellegrino is a very important area regarding both religious and cultural traditions of the city of Palermo; in the last 20 years the urbanized areas at the slopes of the mount have been affected by several rockfall (Cafiso & Cappadonia, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Rockfall hazards of Mount Pellegrino area (Sicily, Southern Italy)

Cappadonia

Cafiso²,

Ferraro³

et al. 2020

Journal of Maps

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A map derived by rockfall analysis at Mount Pellegrino is presented herein. The study area is affected by several phenomena of rockfall which caused numerous damage and a strong social and economic impact. Official reports and maps that give a general assessment of rockfall hazard are available in this respect, however, it would be advisable to provide a more specific cartographic support useful for land management and planning. The drafting of new maps showing the rockfall runout areas is an additional tool that may be used in conjunction with the existing maps as a means of risk mitigation and reduction. On the basis of geological, geomorphological, and geomechanical analysis and exploiting the information relating to a landslides inventory obtained by using both analytical and empirical methods, two different rockfall propagation areas were reconstructed. The final thematic map permit to appreciate the differences and similarities between the obtained runout areas.

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Urban geomorphology of Genoa old city (Italy)

et al. 2020

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Field survey and geomorphological mapping in urban areas are difficult tasks, particularly those related to the recognition of natural landforms within cities. In this case, it is necessary to apply an integrated scientific approach by combining geomorphology with historical-geography. This paper presents the result of a multi-year survey carried out in the natural morphological amphitheatre where the historic centre of Genoa developed. Our research methods included field surveys in urban areas, interpretation of natural and anthropic landforms from maps and photographs, and analyses of the available borehole logs. As a result, we updated knowledge on urban geomorphology of Genoa old city. An original geomorphological legend has been adopted, including new entries for anthropogenic landforms, targeted at a better visual representation on the changes in the geomorphological landscape during more than one thousand years of urban development of the city. The geomorphological map of Genoa old city is presented as a useful tool for urban planning, as well as for an integrated cultural and landscape enhancement of the territory.

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Landslide inventory and rockfall risk assessment of a strategic urban area (Palermo, Sicily)

Cited by 11 publications

References 0 publications

Geomorphology of the urban area of Palermo (Italy)

Geomorphology of the urban area of Palermo (Italy)

Rockfall hazards of Mount Pellegrino area (Sicily, Southern Italy)

Urban geomorphology of Genoa old city (Italy)

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