Qualitative Rockfall Hazard Assessment: A Comprehensive Review of Current Practices

Ferrari, Federica; Giacomini, A.; Thoeni, Klaus

doi:10.1007/s00603-016-0918-z

Cited by 101 publications

(64 citation statements)

References 77 publications

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“…Even though rockfalls constitute a lower economic risk compared to large-scale landslides, they can cause a similar number of fatalities at the same order of magnitude as other landslide types (Hoek, 2000;Budetta, 2004). The reason for this is that when a rockfall occurs, there is practically no time for evacuation and other protective measures that could reduce harm to buildings, infrastructure and people (Ferrari et al, 2016). In Slovenia, rockfalls most often occur in the Alpine region (Slovenian Alps) and in other hilly terrain (Ribičič and Vidrih, 1998;Zorn, 2002;Mikoš et al, 2006;Ribičič, 2010).…”

Section: Introduction Uvodmentioning

confidence: 99%

Reconstruction of rockfall activity through dendrogeomorphology and a scar-counting approach

Žabota¹,

Trappmann²,

Levanič³

et al. 2020

Acta Silvae et Ligni

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Trees represent an important archive that can be used to reconstruct the spatial and temporal patterns of rockfall events. Rockfall impacts can be recorded in the form of anomalies in tree rings and impact scars on the tree stem. In this paper we demonstrate the use of an approach based on counting scars for reconstructing the frequency and spatial pattern of past rockfalls. The approach was applied by counting the visible scars on the stem surface of 52 European beech trees (Fagus sylvatica L.) in the area of the Trenta Valley, Slovenia. The average number of impacts per trees was 7, and the impacts were mostly classified as old, indicating reduced rockfall activity in recent years. The average recurrence interval was 31.8 years, which was reduced by 1.2 years by the application of the conditional impact probability. The spatial pattern of rockfall impacts shows that rockfall activity is higher in the middle part of the studied slope. IZVLEČEKDrevesa so pomemben arhiv podatkov o preteklih dogodkih za rekonstrukcijo prostorske in časovne aktivnosti skalnih podorov, saj beležijo vplive skalnih podorov z anomalijami v rasti drevesnih branik ali prek vizualnih poškodb, vidnih na površju debel. V prispevku je predstavljena metodologija preučevanja skalnih podorov z analizo vidnih poškodb na deblu 52 dreves navadne bukve (Fagus sylvatica L.) na območju doline Trente v Sloveniji. Na podlagi analize smo ugotovili, da je povprečno število poškodb na posamezno drevo 7 ter da večinoma spadajo v kategorijo starih poškodb, kar kaže na manjšo aktivnost skalnih podorov v zadnjih letih. Povprečna povratna doba pojavljanja skalnih podorov je znašala 31,8 let; le-ta pa se skrajša za 1,2 leta, če upoštevamo pogojno verjetnost vpliva, da skale lahko zgrešijo drevesa. Prostorsko pojavljanje skalnih podorov kaže na večjo aktivnost v osrednjem delu preučevanega pobočja.Ključne besede: skalni podori, naravne nevarnosti, dendrogeomorfologija, drevesne branike, poškodbe debla, povratna doba GDK 384+585(497.4Trenta)(045)=111 Prispelo /

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Section: Introduction Uvodmentioning

confidence: 99%

Reconstruction of rockfall activity through dendrogeomorphology and a scar-counting approach

Žabota¹,

Trappmann²,

Levanič³

et al. 2020

Acta Silvae et Ligni

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“…The susceptibility describes the predisposition of an area to be affected by a given future event and results in an estimate of where rockfalls are likely to occur (Guzzetti 2006) [12]. According to Ferrari et al (2016) [13], susceptibility can be assessed by: (a) geomorphological mapping, (b) empirical and semi-empirical rating systems, (c) statistical analyses, and (d) deterministic methods. The resulting susceptibility maps illustrate the predisposition towards instability of a slope or area.…”

Section: Introductionmentioning

confidence: 99%

GIS-Based Rockfall Susceptibility Zoning in Greece

Saroglou

2019

Geosciences

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The assessment of rockfall risks on human activities and infrastructure is of great importance. Rock falls pose a significant risk to (a) transportation infrastructure, (b) inhabited areas, and (c) Cultural Heritage sites. The paper presents a method to assess rockfall susceptibility at national scale in Greece, using a simple rating approach and Geographic Information Systems (GIS) techniques. An extensive inventory of rockfalls for the entire country was compiled for the period between 1935 and 2019. The rockfall events that were recorded are those which have mainly occurred as distinct rockfall episodes in natural slopes and have impacted human activities, such as roads, inhabited areas, and archaeological sites. Through a detailed analysis of the recorded data, it was possible to define the factors which determine the occurrence of rockfalls. Based on this analysis, the susceptibility zoning against rockfalls at the national scale was prepared, using a simple rating approach and GIS techniques. The rockfall susceptibility zoning takes into account the following parameters: (a) the slope gradient, (b) the lithology, (c) the annual rainfall intensity, (d) the earthquake intensity, and (e) the active fault presence. Emphasis was given on the study of the earthquake effect as a triggering mechanism of rockfalls. Finally, the temporal and spatial frequency of the recorded events and the impact of rockfalls on infrastructure assets and human activities in Greece were evaluated.

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“…The susceptibility describes the predisposition of an area to be affected by a given future event and results in an estimate of where rockfalls are likely to occur (Guzzetti 2006). According to Ferrari et al (2016), The resulting susceptibility maps illustrate the predisposition towards instability of a slope or area. According to Fell et al (2008), rockfall susceptibility may be assessed based on either qualitative or quantitative approach.…”

Section: Introductionmentioning

confidence: 99%

GIS-Based Rockfall Susceptibility Zoning in Greece

Saroglou¹

2019

Preprint

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The assessment of rockfall risks on human activities and infrastructure is of great importance. Rock falls pose a significant risk to a) transportation infrastructure b) inhabited areas and c) Cultural Heritage sites. The paper presents a method to assess rockfall susceptibility at national scale in Greece, using a simple rating approach and GIS techniques. An extensive inventory of rockfalls for the entire country was compiled for the period between 1935 and 2019. The rockfall events that were recorded are those, which have mainly occurred as distinct rockfall episodes in natural slopes and have impacted human activities, such as roads, inhabited areas and archaeological sites. Through a detailed analysis of the recorded data, it was possible to define the factors which determine the occurrence of rockfalls. Based on this analysis, the susceptibility zoning against rockfalls at national scale was prepared, using a simple rating approach and GIS techniques. The rockfall susceptibility zoning takes into account the following parameters: (a) the slope gradient, (b) the lithology, (c) the annual rainfall intensity, (d) the earthquake intensity and (e) the active fault presence. Emphasis was given on the study of the earthquake effect as a triggering mechanism of rockfalls. Finally, the temporal and spatial frequency of the recorded events and the impact of rockfalls on infrastructure assets and human activities in Greece were evaluated.

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Qualitative Rockfall Hazard Assessment: A Comprehensive Review of Current Practices

Cited by 101 publications

References 77 publications

Reconstruction of rockfall activity through dendrogeomorphology and a scar-counting approach

Reconstruction of rockfall activity through dendrogeomorphology and a scar-counting approach

GIS-Based Rockfall Susceptibility Zoning in Greece

GIS-Based Rockfall Susceptibility Zoning in Greece

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