Paper contribution

UAV-Based Geostructural Characterization of Discontinuities in a Rock Wall to Support Rockfall Stability Analyses

Alessandro Valletta; Salar Khaiiatali; Chimene Larissa Mbougoue Mabapgap

Proceedings
EUROCK 2026
Pages
465-471
Submitted
28 January 2026
Accepted
15 June 2026
Published
12 August 2026

Summary

Abstract

The characterization of discontinuity networks in rock slopes is a fundamental step for assessing block-size distribution and evaluating kinematic feasibility in rockfall modelling. This study focuses on the geostructural analysis of the Groppo Sovrano cliff (Parma Province, Northern Italy), a sandstone slope located in close proximity Provincial Road SP75 and affected by recurrent block detachments, which hindered the road accessibility and caused its closure. To capture the morphology of the nearly vertical and partially inaccessible rock wall, a high-resolution UAV survey combining photogrammetry and laser scanning was carried out. The integration of these datasets produced a dense, georeferenced 3D point cloud that served as the basis for a detailed structural interpretation. The main families of discontinuities were identified by extracting planar features and subsequent clustering of their orientations by defining virtual scanlines across the point cloud, in order to obtain statistically consistent measurements of discontinuity spacing. The primary objective of the investigation was to quantify block dimensions and provide useful insights for numerical rockfall modelling purposes. By integrating remote sensing data, discontinuity mapping, and spacing analysis, the study establishes a coherent framework for the execution of appropriate stability analyses focused on the potential detachment of rock blocks from the cliff, consequently allowing for the identification and planning of mitigation measures to protect the Provincial Road located below the rock wall.

Contributors

Authors

  1. Alessandro Valletta University of Parma, Italy ORCID 0000-0001-9126-6717
  2. Salar Khaiiatali University of Parma, Italy
  3. Chimene Larissa Mbougoue Mabapgap University of Parma, Italy

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References

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