Towards a GIS-based rockfall hazard assessment along the Quebec City Promontory, Quebec, Canada

Baillifard, F.; Jaboyedoff, Michel; Rouiller, Jean-Daniel; Robichaud, G; Locat, Pascal; Locat, Jacques; Couture, R; Hamel, Gary

doi:10.1201/b16816-28

Cited by 12 publications

(8 citation statements)

References 2 publications

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“…Long-term records of rapid mass movements, such as rockfalls, have proven to be quite limited, especially in urbanized areas where inventories are largely absent (Volkwein et al, 2011) and where, at the same time, the number of events increases in proportion to urbanization (Baillifard et al, 2004). In these areas, finding ways that allow precise reconstruction of past rockfall activity are urgently needed.…”

Section: Discussionmentioning

confidence: 99%

Potential of two submontane broadleaved species (Acer opalus, Quercus pubescens) to reveal spatiotemporal patterns of rockfall activity

et al. 2015

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Section: Discussionmentioning

confidence: 99%

Potential of two submontane broadleaved species (Acer opalus, Quercus pubescens) to reveal spatiotemporal patterns of rockfall activity

et al. 2015

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“…Of course, the simplest way to detect a source area is to use a slope angle threshold (Guzzetti et al, 2003), or to add some other criteria such as the presence of cliff areas (Jaboyedoff and Labiouse, 2003). The slope threshold can be deduced from a detailed slope angle statistical analysis permitting one to identify cliff areas (Strahler, 1954;Baillifard et al, 2003Baillifard et al, , 2004Loye et al, 2009). In addition, some other approaches can be used for assessing the susceptibility of source areas, such as using an index obtained by the back-analysis of rockfall propagation.…”

Section: Gis and Dem Analysis-based Methodsmentioning

confidence: 99%

Rockfall characterisation and structural protection – a review

Volkwein

Schellenberg²,

Labiouse

et al. 2011

Nat. Hazards Earth Syst. Sci.

388

210

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Abstract. Rockfall is an extremely rapid process involving long travel distances. Due to these features, when an event occurs, the ability to take evasive action is practically zero and, thus, the risk of injury or loss of life is high. Damage to buildings and infrastructure is quite likely. In many cases, therefore, suitable protection measures are necessary. This contribution provides an overview of previous and current research on the main topics related to rockfall. It covers the onset of rockfall and runout modelling approaches, as well as hazard zoning and protection measures. It is the aim of this article to provide an in-depth knowledge base for researchers and practitioners involved in projects dealing with the rockfall protection of infrastructures, who may work in the fields of civil or environmental engineering, risk and safety, the earth and natural sciences.

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“…Loye (alexandre.loye@unil.ch) risk in mountainous areas is increasing as the population and economic activity increase (Baillifard et al, 2004;Leroi et al, 2005). As a consequence, the identification of rockfall hazard prone areas is of primary importance for producing hazard maps.…”

Section: Introductionmentioning

confidence: 99%

Identification of potential rockfall source areas at a regional scale using a DEM-based geomorphometric analysis

Loye

Jaboyedoff

Pedrazzini

2009

Nat. Hazards Earth Syst. Sci.

111

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Abstract. The availability of high resolution Digital Elevation Models (DEM) at a regional scale enables the analysis of topography with high levels of detail. Hence, a DEM-based geomorphometric approach becomes more accurate for detecting potential rockfall sources. Potential rockfall source areas are identified according to the slope angle distribution deduced from high resolution DEM crossed with other information extracted from geological and topographic maps in GIS format. The slope angle distribution can be decomposed in several Gaussian distributions that can be considered as characteristic of morphological units: rock cliffs, steep slopes, footslopes and plains. A terrain is considered as potential rockfall sources when their slope angles lie over an angle threshold, which is defined where the Gaussian distribution of the morphological unit "Rock cliffs" become dominant over the one of "Steep slopes". In addition to this analysis, the cliff outcrops indicated by the topographic maps were added. They contain however "flat areas", so that only the slope angles values above the mode of the Gaussian distribution of the morphological unit "Steep slopes" were considered. An application of this method is presented over the entire Canton of Vaud (3200 km 2 ), Switzerland. The results were compared with rockfall sources observed on the field and orthophotos analysis in order to validate the method. Finally, the influence of the cell size of the DEM is inspected by applying the methodology over six different DEM resolutions.

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Towards a GIS-based rockfall hazard assessment along the Quebec City Promontory, Quebec, Canada

Cited by 12 publications

References 2 publications

Potential of two submontane broadleaved species (Acer opalus, Quercus pubescens) to reveal spatiotemporal patterns of rockfall activity

Potential of two submontane broadleaved species (Acer opalus, Quercus pubescens) to reveal spatiotemporal patterns of rockfall activity

Rockfall characterisation and structural protection – a review

Identification of potential rockfall source areas at a regional scale using a DEM-based geomorphometric analysis

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