Drone-Based Identification of Erosive Processes in Open-Pit Mining Restored Areas
Padró Garcia, Joan-Cristian (Universitat Autònoma de Barcelona. Departament de Geografia)
Cardozo, Johnsson (Universitat Autònoma de Barcelona. Departament de Geografia)
Montero, Pau (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Ruiz-Carulla, Roger (Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental)
Alcañiz, Josep M. (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Serra, Dèlia (Agents Rurals De la Generalitat de Catalunya. Unitat RPAS)
Carabassa, Vicenç (Centre de Recerca Ecològica i d'Aplicacions Forestals)

Data:	2022
Resum:	Unmanned Aerial Systems, or drones, are very helpful tools for managing open-pit mining operations and developing ecological restoration activities. This article presents a method for identifying water erosion processes in active quarries by means of drone imagery remote sensing, in the absence of pre-existing imagery or mapping for comparison. A Digital Elevation Model (DEM) with a spatial resolution (SR) >10 cm and an orthophoto with an SR >2. 5 cm were generated from images captured with a drone and their subsequent photogrammetric processing. By using Geographical Information Systems tools to process the DEM, a detailed drainage network was obtained, the areas of detected water erosion were separated, and the watersheds in the gullies identified. Subsequently, an estimated DEM before the erosive processes was reconstructed by interpolating the gully ridges; this DEM serves as a reference for the relief before the erosion. To calculate the volume of eroded material, the DEM of Differences was calculated, which estimates the volume difference between the previously estimated DEM and the current DEM. Additionally, we calculated the material necessary for the geomorphological adaptation of the quarry and the slope map, which are two valuable factors closely related to the monitoring of erosive processes. The results obtained allowed us to identify the erosion factors quickly and accurately in this type of mining. In the case of water-filled quarries, it would be important to characterize the subsurface relief. Essentially, the presented method can be applied with affordable and non-invasive materials to create digital grid maps at 10 cm resolution, obtaining data ready for 3D metrics, being a very practical landscape modelling tool for characterizing the restoration evolution of open-pit mining spaces.
Nota:	Altres ajuts: European Union LIFE20 PRE/IT/000007
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	UAS ; Unmanned Aerial Systems ; Mining ; Restoration ; Erosion ; Digital terrain models ; GIS tools
Publicat a:	Land, Vol. 11, Issue 2 (February 2022) , art. 212, ISSN 2073-445X

DOI: 10.3390/land11020212

13 p, 4.1 MB

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Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > Grup de Recerca Mètodes i Aplicacions en Teledetecció i Sistemes d'Informació Geogràfica (GRUMETS)
Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals)
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