Journal cover Journal topic
Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
doi:10.5194/nhess-2017-56
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
21 Feb 2017
Review status
This discussion paper is under review for the journal Natural Hazards and Earth System Sciences (NHESS).
Slope stability and rock fall hazard assessment of volcanic tuffs using RPAS and TLS with 2D FEM slope modelling
Ákos Török1, Árpád Barsi2, Gyula Bögöly1, Tamás Lovas2, Árpád Somogyi2, and Péter Görög1 1Department of Engineering Geology and Geotechnics, Budapest University of Technology and Economics, Budapest, H-1111, Hungary
2Department of Photogrammetry and Geoinformatics, Budapest University of Technology and Economics, Budapest, H-1111, Hungary
Abstract. Low strength rhyolite tuff forms steep cliffs in NE Hungary. A multi-dimensional approach including field analysis and laboratory tests was conducted to understand the mechanical properties of the tuff and to measure discontinuity surfaces. With the help of RPAS (Remotely Piloted Aircraft System) and TLS (Terrestrial Laser Scanning), a digital terrain model (DTM) was generated, and the results of these surveys were compared. Cross sections and joint system data were obtained from DTM and used as input parameters for the slope stability analyses. The rocky slope was modelled by 2D FEM (Finite Element Method) software and potential hazards such as planar failure, wedge failure and toppling were identified. The paper demonstrates the usefulness of combined field analyses, geomechanical laboratory testing and various remote sensing techniques (such as RPAS and TLS) in rock face stability calculations and failure mode analysis.

Citation: Török, Á., Barsi, Á., Bögöly, G., Lovas, T., Somogyi, Á., and Görög, P.: Slope stability and rock fall hazard assessment of volcanic tuffs using RPAS and TLS with 2D FEM slope modelling, Nat. Hazards Earth Syst. Sci. Discuss., doi:10.5194/nhess-2017-56, in review, 2017.
Ákos Török et al.
Ákos Török et al.
Ákos Török et al.

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Short summary
The present study demonstrates the application of drones and terrestrial laser scanner in stability assessment of steep, hardly accessible rock slopes that can endanger human lives. If the focus is on hazard evaluation, these technologies must be deployed very quickly, but data processing requires time. For reliable hazard evaluation besides these techniques, engineering geological field work and laboratory tests of the mechanical properties of rocks are also necessary.
The present study demonstrates the application of drones and terrestrial laser scanner in...
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