Documenting rock mass failure with UAV during an emergency phase: Castell de Mur case study
| Autor: | Ruiz Carulla, Roger, Corominas Dulcet, Jordi |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental, Universitat Politècnica de Catalunya. EnGeoModels - Monitoring and Modelling in Engineering Geology |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| Popis: | The understanding of the conditioning factors and of the mechanisms involved in rockfalls are requirements for a successful risk assessment and for the prevention of future events. In that respect, the detailed documentation of past event may contribute to this goal. This communication presents methodologies based on UAV surveys to collect detailed documentation of a rock failure as fast as possible to allow the opening of the affected road. The Castell de Mur rock mass failure was a catastrophic mass movement involving around 18.000 m3 and causing 2 fatalities. We use this case to show the possibilities of immediate UAV surveys to create products and models to characterize and document a rock mass failure. The photogrammetric products (orthophoto, Digital Elevation Model, 3D Point cloud and 3D texturized mesh) are used to characterize the rock failure obtaining: high-resolution topographic maps; the block size distribution of fragments in the deposit; the total mobilized volume estimated; the distribution of rock bridges from scar image analysis; and finally, the identification of the involved joint sets and interpretation of the failure mechanism. These products may be used to characterize the failure and to identify the key features for subsequent stability analysis. The realization of the UAV flight has allowed us to collect detailed information about the failure scar and the rockfall debris that would otherwise have been lost after the clean-up of the site and implementation of the remedial works. This study was supported by the ROCKMODELS research project (BIA2016-75668-P, AEI/FEDER.UE) funded by the Spanish Ministry of Economy and Competitiveness. We are grateful to the Road Department of the Diputació de Lleida, for all the support provided. |
| Databáze: | OpenAIRE |
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