Automated sliding susceptibility mapping of rock slopes

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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“…-by deterministic methods (Jaboyedoff et al, 2004a;Guenther et al, 2004;Derron et al, 2005) or -by statistical methods (Frattini et al, 2008).…”

Section: Onset Probability and Susceptibilitymentioning

confidence: 99%

Rockfall characterisation and structural protection – a review

Volkwein

Schellenberg²,

Labiouse

et al. 2011

Nat. Hazards Earth Syst. Sci.

389

210

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“…We assessed the failure susceptibility of the Cretaceous chalk cliff portions by performing spatially distributed kinematical rock slope failure testing on geological discontinuities with the SLOPEMAP software of the RSS-GIS package (Günther, 2003;Günther et al, 2004). The database for the kinematical rock slope failure testing procedures consists of a 5×5 m digital elevation model (DEM) provided by StAUN (Staatliches Amt für Umwelt und Natur, Rostock, Germany), more than 1500 directional measurements of individual planar discontinuities, and a detailed cliff mapping prepared by Steinich Steinich (1972, detail).…”

Section: Datamentioning

confidence: 99%

Combined rock slope stability and shallow landslide susceptibility assessment of the Jasmund cliff area (Rügen Island, Germany)

Günther¹,

Thiel

2009

Nat. Hazards Earth Syst. Sci.

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Abstract. In this contribution we evaluated both the structurally-controlled failure susceptibility of the fractured Cretaceous chalk rocks and the topographically-controlled shallow landslide susceptibility of the overlying glacial sediments for the Jasmund cliff area on Rügen Island, Germany. We employed a combined methodology involving spatially distributed kinematical rock slope failure testing with tectonic fabric data, and both physically-and inventory-based shallow landslide susceptibility analysis. The rock slope failure susceptibility model identifies areas of recent cliff collapses, confirming its value in predicting the locations of future failures. The model reveals that toppling is the most important failure type in the Cretaceous chalk rocks of the area. The shallow landslide susceptibility analysis involves a physically-based slope stability evaluation which utilizes material strength and hydraulic conductivity data, and a bivariate landslide susceptibility analysis exploiting landslide inventory data and thematic information on ground conditioning factors. Both models show reasonable success rates when evaluated with the available inventory data, and an attempt was made to combine the individual models to prepare a map displaying both terrain instability and landslide susceptibility. This combination highlights unstable cliff portions lacking discrete landslide areas as well as cliff sections highly affected by past landslide events. Through a spatial integration of the rock slope failure susceptibility model with the combined shallow landslide assessment we produced a comprehensive landslide susceptibility map for the Jasmund cliff area.

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“…For instance, the RSS-GIS method (Günther et al, 2004) allows us to deal with internal parameters and external factors of rockfalls. But, it requires a lot of data on topog- raphy, structural geology, geotechnical settings and climatic conditions.…”

Section: Advantages and Limitations Of The Presented Approachmentioning

confidence: 99%

“…Therefore, more complex models have been developed integrating these conditions to enhance the source detection at regional scale. They introduced rating systems following empirical multi-criteria observations (Pierson et al, 1990;Baillifard et al, 2003), structural settings and kinematics analysis (Wagner et al, 1988;Jaboyedoff et al, 1999;Gokceoglu et al, 2000;Günther, 2003), safety factor computations (Hoek and Bray, 1981), or joining IP and EF conditions (Günther et al, 2004;Oppikofer et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Rockfall hazard and risk assessments along roads at a regional scale: example in Swiss Alps

Michoud

Derron

Horton

et al. 2012

Nat. Hazards Earth Syst. Sci.

128

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Abstract. Unlike fragmental rockfall runout assessments, there are only few robust methods to quantify rock-massfailure susceptibilities at regional scale. A detailed slope angle analysis of recent Digital Elevation Models (DEM) can be used to detect potential rockfall source areas, thanks to the Slope Angle Distribution procedure. However, this method does not provide any information on block-release frequencies inside identified areas. The present paper adds to the Slope Angle Distribution of cliffs unit its normalized cumulative distribution function. This improvement is assimilated to a quantitative weighting of slope angles, introducing rock-mass-failure susceptibilities inside rockfall source areas previously detected. Then rockfall runout assessment is performed using the GIS-and process-based software Flow-R, providing relative frequencies for runout. Thus, taking into consideration both susceptibility results, this approach can be used to establish, after calibration, hazard and risk maps at regional scale. As an example, a risk analysis of vehicle traffic exposed to rockfalls is performed along the main roads of the Swiss alpine valley of Bagnes.

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Automated sliding susceptibility mapping of rock slopes

Cited by 47 publications

References 13 publications

Rockfall characterisation and structural protection – a review

Rockfall characterisation and structural protection – a review

Combined rock slope stability and shallow landslide susceptibility assessment of the Jasmund cliff area (Rügen Island, Germany)

Rockfall hazard and risk assessments along roads at a regional scale: example in Swiss Alps

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