Geohazard Plugin: A QGIS Plugin for the Preliminary Analysis of Landslides at Medium–Small Scale

Marta Castelli (), Andrea Filipello, Claudio Fasciano, Giulia Torsello, Stefano Campus and Rocco Pispico
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Marta Castelli: Department of Structural, Building and Geotechnical Engineering, Politecnico di Torino, 10129 Turin, Italy
Andrea Filipello: Agenzia Regionale per la Protezione Ambientale del Piemonte, 10135 Turin, Italy
Claudio Fasciano: Department of Structural, Building and Geotechnical Engineering, Politecnico di Torino, 10129 Turin, Italy
Giulia Torsello: Department of Structural, Building and Geotechnical Engineering, Politecnico di Torino, 10129 Turin, Italy
Stefano Campus: Regione Piemonte, 10127 Turin, Italy
Rocco Pispico: Agenzia Regionale per la Protezione Ambientale del Piemonte, 10135 Turin, Italy

Land, 2025, vol. 14, issue 2, 1-26

Abstract: Landslides are a major global threat, endangering lives, infrastructure, and economies. This paper introduces the Geohazard plugin, an open-source tool for QGIS, designed to support medium–small-scale landslide analysis and management. The plugin integrates several algorithms, including the Groundmotion–C index for evaluating SAR data reliability, Landslide–Shalstab for assessing shallow landslide susceptibility, and Rockfall–Droka for estimating rockfall invasion areas and the rockfall relative (spatial) hazard. An application example is provided for each module to facilitate validation and discussion. A case study from the Western Italian Alps highlights the practical application of the Rockfall–Droka modules, showcasing their potential to identify critical zones by integrating the results on affected areas, process intensity, and preferential paths. Emphasis is given to the calibration of model parameters, a critical aspect of the analysis, achieved through a back-analysis of a rockfall event that occurred in June 2024. The Geohazard plugin streamlines geohazard assessments, providing land managers with actionable insights for decision-making and risk mitigation strategies. This user-friendly GIS tool contributes to enhancing resilience in landslide-prone regions.

Keywords: land management; landslides assessment; open-source; GIS-based tools; Geohazard plugin (search for similar items in EconPapers)
JEL-codes: Q15 Q2 Q24 Q28 Q5 R14 R52 (search for similar items in EconPapers)
Date: 2025
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