Automated mapping of rock slope geometry,kinematics and stability with RSS-GIS |
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Authors: | Andreas Günther Jan Wienhöfer Heinz Konietzky |
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Affiliation: | 1.Federal Institute for Geosciences and Natural Resources (BGR),Hannover,Germany;2.Institute of Environmental Geology,TU Braunschweig,Braunschweig,Germany;3.Geotechnical Institute,TU Bergakademie Freiberg,Freiberg,Germany;4.Institute of Water and Environment,Technische Universit?t München,München,Germany |
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Abstract: | A GIS-implemented, deterministic approach for the automated spatial evaluation of geometrical and kinematical properties of rock slope terrains is presented. Based on spatially distributed directional information on planar geological fabrics and DEM-derived topographic attribute data, the internal geometry of rock slopes can be characterized on a grid cell basis. For such computations, different approaches for the analysis and regionalization of available structural directional information applicable in specific tectonic settings are demonstrated and implemented in a GIS environment. Simple kinematical testing procedures based on feasibility criteria can be conducted on a pixel basis to determine which failure mechanisms are likely to occur at particular terrain locations. In combination with hydraulic and strength data on geological discontinuities, scenario-based rock slope stability evaluations can be performed. For conceptual investigations on rock slope failure processes, a GIS-based specification tool for a 2-D distinct element code (UDEC) was designed to operate with the GIS-encoded spatially distributed rock slope data. The concepts of the proposed methodology for rock slope hazard assessments are demonstrated at three different test sites in Germany. |
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