Geology, slow-moving landslides, and damages to buildings in the Verbicaro area (north-western Calabria region, southern Italy)

Borrelli, Luigi; Nicodemo, Gianfranco; Ferlisi, Settimio; Peduto, Dario; Nocera, Silvio; Gullà, Giovanni

doi:10.1080/17445647.2018.1425164

Cited by 15 publications

(11 citation statements)

References 38 publications

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“…The hilly and mountainous central part of the Freetown Layered Complex has documented more landslide events and caused colossal losses (UNDP and EPA, 2017; Bruce 2019) than any other place within the Layered Complex (FCC 2014;INTEGEMS 2017;Arup, BGS, JBA, and INTEGEMS, 2018). One such incident was the Regent landslide which affected the Sugarloaf Mountain and claimed more lives (i.e.1, 100 people) than anywhere globally in 2017 (Redshaw et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

A comparative geological, tectonic and geomorphological assessment of the Charlotte, Regent and Madina landslides, Western area, Sierra Leone

Lahai

Anderson

Jalloh

et al. 2021

Geoenviron Disasters

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This work focused on three landslide events that have attracted significant public concern due to the associated calamities they recorded in 1945, 2017 and 2019, i.e. the Charlotte, Regent and Madina landslides, respectively. Their geology, tectonics (structural discontinuities) and geomorphology, i.e. their GTG characteristics were studied to establish links between them and the landslide events.Field surveys were conducted, particularly on the Charlotte landslide, where the identification of geological structures was impeded to an extent by its obliteration by vegetation and sediment accumulations on relatively planar sections of the landslide area. Remote sensing and GIS techniques (earth imagery and drone images) enhanced the mapping and determination of landslides’ geometric and geomorphic parameters. Laboratory analyses of rock and soil samples provided the landslides’ petrological characterisation and were used to determine the particle-size distribution in the slide-prone soil.The study indicated a change in the gabbroic rock composition, variable geomorphological characteristics, and nature/pattern and density of the discontinuities. These factors, to a large extent, determined the nature and magnitude of the rainfall-triggered landslides. Charlotte lithology slightly differed from the other two landslides and recorded higher Silica (Si) and Aluminum (Al) and lower iron (Fe) from X-Ray Fluorescence (XRF) than rocks of Regent and Madina landslides. The study also revealed only a tenuous correlation between rock composition and weathering depth. The slope angles at the landslides’ prominent scarps (depletion zone) are steep (> 45 degrees) with altitudes of approximately 270 m, 200 m and 470 m above sea level for Charlotte, Regent and Madina, respectively. Unlike the Charlotte landslide, both Regent and Madina landslides are active, but geometrically, their area, length and run-out distances have relatively high variance with a coefficient of variance equals to 1. Information derived from this work can help understand the spatial variation in landslide characteristics and develop a susceptibility map.

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Section: Introductionmentioning

confidence: 99%

A comparative geological, tectonic and geomorphological assessment of the Charlotte, Regent and Madina landslides, Western area, Sierra Leone

Lahai

Anderson

Jalloh

et al. 2021

Geoenviron Disasters

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“…2). From the geological point of view, the prevailing Frido Unit, constituted by low-grade metamorphic rocks usually marked by extensional brittle-ductile shear zones, includes metapelites, phyllites, shales and metalime-stones; it tectonically overlays the Lungro-Verbicaro Unit that outcrops in correspondence of the historic centre (Amodio Morelli et al 1976;Borrelli et al 2018;Ferlisi et al 2015;Nicodemo et al 2017Nicodemo et al , 2018. At the top of the units, locally covered by colluvial deposits, blocks and fragments of metamorphic rocks in a prevalently clayey matrix can be found.…”

Section: Medium Scalementioning

confidence: 99%

“…in the urban area as well as the slow-moving landslide inventory map, drawn up by Borrelli et al (2018) at 1:5000 scale. Based on the outcomes of previous studies concerning the Calabria region (Sorriso-Valvo 1993; Antronico et al 1996;Greco et al 2007;Gullà et al 2017b), the mapped landslides are classified as: roto-translational slides, complex landslides, and landslide zones (Fig.…”

Section: Medium Scalementioning

confidence: 99%

A multi-scale methodological approach for slow-moving landslide risk mitigation in urban areas, southern Italy

Ferlisi

Gullà

Nicodemo

et al. 2019

Euro-Mediterr J Environ Integr

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Several urban areas in Euro-Mediterranean countries are affected by slow-moving landslides that, even if rarely associated with the loss of human life, can cause damage to structures and infrastructure. In such contexts, the progressive decay of the built environment can bring along a generalized increase of the physical vulnerability and, as a result, slow-moving landslide risk increases over the time. Under these conditions, as long as suitable risk mitigation measures are lacking, the level of risk (also related to earthquakes) could turn out to be no longer acceptable within an a priori unknown time interval. This problem has a relevant social-economic impact, thus requiring the adoption of risk mitigation strategies that need to be effective and, at the same time, sustainable for the involved stakeholders. In this regard, this paper proposes a multiscale methodological approach-based on the joint use of satellite-derived displacement monitoring data and the results of building damage surveys-whose applicability is tested with reference to urban areas affected by slow-moving landslides in Calabria region (southern Italy).

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“…Slow-moving landslides are observed worldwide in many countries, e.g. Italy (Cascini et al, 2008;Antronico et al, 2015;Uzielli et al, 2015a;Borrelli et al, 2018;Ferlisi et al, 2019), Canada (Clifton et al, 1986;Brooker and Peck, 1993;Moore et al, 2006;Barlow, 2000), China (Chen et al, 2016;Zhang et al, 2018;Dong et al, 2018;Wang et al, 2018), the USA (Esser, 2000), and Australia (Jworchan et al, 2008). Fell et al (2008) suggested the estimation of the physical vulnerability of elements at risk for various landslide types.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the physical vulnerability of buildings affected by slow-moving landslides

Chen¹,

Chen²,

Gui³

et al. 2020

Nat. Hazards Earth Syst. Sci.

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Abstract. Physical vulnerability is a challenging and fundamental issue in landslide risk assessment. Previous studies mostly focus on generalized vulnerability assessment from landslides or other types of slope failures, such as debris flow and rockfall, while the long-term damage induced by slow-moving landslides is usually ignored. In this study, a method was proposed to construct physical vulnerability curves for masonry buildings by taking the Manjiapo landslide as an example. The landslide's force acting on the buildings' foundation is calculated by applying the landslide residual-thrust calculation method. Considering four rainfall scenarios, the buildings' physical responses to the thrust are simulated in terms of potential inclination by using Timoshenko's deep-beam theory. By assuming the landslide safety factor to be landslide intensity and inclination ratio to be vulnerability, a physical vulnerability curve is fitted and the relative function is constructed by applying a Weibull distribution function. To investigate the effects of buildings' parameters that influence vulnerabilities, the length, width, height, and foundation depth and Young's modulus of the foundation are analysed. The validation results on the case building show that the physical vulnerability function can give a good result in accordance with the investigation in the field. The results demonstrate that the building length, width, and foundation depth are the three most critical factors that affect the physical vulnerability value. Also, the result shows that the higher the ratio of length to width of the building, the more serious the damage to the building. Similarly, the shallower the foundation depth is, the more serious the damage will be. We hope that the established physical vulnerability curves can serve as tools for the quantitative risk assessment of slow-moving landslides.

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Geology, slow-moving landslides, and damages to buildings in the Verbicaro area (north-western Calabria region, southern Italy)

Cited by 15 publications

References 38 publications

A comparative geological, tectonic and geomorphological assessment of the Charlotte, Regent and Madina landslides, Western area, Sierra Leone

A comparative geological, tectonic and geomorphological assessment of the Charlotte, Regent and Madina landslides, Western area, Sierra Leone

A multi-scale methodological approach for slow-moving landslide risk mitigation in urban areas, southern Italy

Assessment of the physical vulnerability of buildings affected by slow-moving landslides

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