Assessing fracture occurrence using &amp;quot;weighted fracturing density&amp;quot;: a step towards estimating rock instability hazard

Jaboyedoff, Michel; Baillifard, F.; Philippossian, F.; Rouiller, Jean-Daniel

doi:10.5194/nhess-4-83-2004

Cited by 44 publications

(34 citation statements)

References 21 publications

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“…This method makes it possible to discriminate efficiently the true cliffs from the one drawn on topographic maps. In addition, as proposed by Günther (2003) and Jaboyedoff et al (2004c), structural analysis performed on ALS-DEM (Fig. 4) can be the basis for kinematic test.…”

Section: Alsmentioning

confidence: 99%

Use of LIDAR in landslide investigations: a review

et al. 2010

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This paper presents a short history of the appraisal of laser scanner technologies in geosciences used for imaging relief by high-resolution digital elevation models (HRDEMs) or 3D models. A general overview of light detection and ranging (LIDAR) techniques applied to landslides is given, followed by a review of different applications of LIDAR for landslide, rockfall and debris-flow. These applications are classified as: (1) Detection and characterization of mass movements; (2) Hazard assessment and susceptibility mapping; (3) Modelling; (4) Monitoring. This review emphasizes how LIDARderived HRDEMs can be used to investigate any type of landslides. It is clear that such HRDEMs are not yet a common tool for landslides investigations, but this technique has opened new domains of applications that still have to be developed.

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Section: Alsmentioning

confidence: 99%

Use of LIDAR in landslide investigations: a review

et al. 2010

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“…The detection may be automated by using Geographical Information Systems (e.g. Tanays et al, 1989Tanays et al, , 1992Jaboyedoff et al, 1999).…”

Section: Detection Of Potential Rock Fall Sourcesmentioning

confidence: 99%

An historical, geomechanical and probabilistic approach to rock-fall hazard assessment

Hantz

Vengeon

Dussauge-Peisser

2003

Nat. Hazards Earth Syst. Sci.

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Abstract.A new method (HGP for Historical, Geomechanical and Probabilistic) is proposed to estimate the failure probability of potentially unstable rock masses in a homogenous area, as a function of time. Analysis of a rock falls inventory yields the mean number of rock falls which may be expected in the area for the given time period and a given volume range. According to their geomechanical features, the potentially unstable rock masses are distributed in classes corresponding to different failure probabilities. The expected number of rock falls can be expressed as a function of these unknown probabilities. Assuming that only the ratio between these probabilities can be estimated, combining the historical and geomechanical analysis allows estimating the order of magnitude of the different failure probabilities. The method gives a quantitative significance to the evaluations which are usually attributed to potentially unstable rock masses. Rock-fall hazard can then be compared with other natural hazards, such as floods or earthquakes. The method is applied to a case study of calcareous cliffs in the area of Grenoble, France.

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“…It should be noted that this method assumed structurally homogeneous areas in regional scale as scope (precision) (Jaboyedoff et al, 1999). To put into scope the parameter used in determining the friction angle for the region, the slope family concept presented by different studies by Strahler (1954), Baillifard et al (2005), Jaboyedoff et al (2004), Loye et al (2008), andMichoud et al (2012) is a suitable tool due to prominent slope families produced by active movement in a large part of the province (Cole et al, 1989;Duquesnoy, 1997).…”

Section: Slope Angle Distributionmentioning

confidence: 99%

“…This step allows large amount of computer-generated point cloud data of discontinuity sets necessary for structural analysis that uses stereoplots and rose diagrams. It should be noted that this method assumed structurally homogeneous areas in regional scale as scope (precision) (Jaboyedoff et al, 1999).…”

Section: Discontinuity Identificationmentioning

confidence: 99%

Hazard mapping related to structurally controlled landslides in Southern Leyte, Philippines

Luzon

Montalbo

Galang

et al. 2016

Nat. Hazards Earth Syst. Sci.

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Abstract. The 2006 Guinsaugon landslide in Saint Bernard, Southern Leyte, is one of the largest known landslides in the Philippines in recent history. It consists of a 15-20 million m 3 rockslide-debris avalanche from an approximately 675 m high mountain weakened by continuous movement of the Philippine Fault. The catastrophic Guinsaugon landslide killed 1221 people and displaced 19 000 residents over its 4.5 km path. To investigate the present-day morphology of the scar and potential failure that may occur, analysis of a 5 m resolution InSAR-derived digital elevation model was conducted using Coltop3D and Matterocking software, leading to the generation of a landslide hazard map for the province of Southern Leyte in central Philippines. The dip and dip direction of discontinuity sets that contribute to gravitational failure in mountainous areas of the province were identified and measured using a lower Schmidt-Lambert color scheme. After measurement of the morpho-structural orientations, potential sites of failure were analyzed. Conefall was then utilized to compute the extent of rock mass runout. Results of the analysis show instability in the scarp area of the 2006 Guinsaugon landslide and in adjacent slopes because of the presence of steep discontinuities that range from 45 to 60 • . Apart from the 2006 Guinsaugon landslide site, runout models simulated farther rock mass extent in its adjacent slopes, revealing a high potential for fatal landslides to happen in the municipality of Saint Bernard. Concerned agencies may use maps produced in the same manner as this study to identify possible sites where structurally controlled landslides can occur. In a country like the Philippines, where fractures and faults are common, this type of simulated hazard maps would be useful for disaster prevention and facilitate disaster risk reduction efforts for landslide-susceptible areas.

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Assessing fracture occurrence using "weighted fracturing density": a step towards estimating rock instability hazard

Cited by 44 publications

References 21 publications

Use of LIDAR in landslide investigations: a review

Use of LIDAR in landslide investigations: a review

An historical, geomechanical and probabilistic approach to rock-fall hazard assessment

Hazard mapping related to structurally controlled landslides in Southern Leyte, Philippines

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