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Open AccessFeature PaperTechnical Note

Rockfall Simulation Based on UAV Photogrammetry Data Obtained during an Emergency Declaration: Application at a Cultural Heritage Site

1
Geological Survey of Spain, Ríos Rosas 23, 28003 Madrid, Spain
2
Department of Civil Engineering, University of Alicante, P.O. Box 99, E-03080 Alicante, Spain
3
Geological Survey of Spain, Urb. Alcázar del Genil 4. Edificio Zulema, 18006 Granada, Spain
*
Author to whom correspondence should be addressed.
Remote Sens. 2018, 10(12), 1923; https://doi.org/10.3390/rs10121923
Received: 15 October 2018 / Revised: 17 November 2018 / Accepted: 27 November 2018 / Published: 30 November 2018
(This article belongs to the Special Issue Landslide Hazard and Risk Assessment)
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Abstract

In recent years, there was an increasing number of studies focusing on rockfalls due to their impacts on social and sustainable development. This work carries out a three-dimensional (3D) simulation of rockfalls at a cultural heritage site nearby the village of Cortes de Pallás (Valencian Community, East Spain). The simulation is based on data collected previously, during an emergency declaration due to the occurrence of a considerable rockfall (7980 m3) on the southern bank of the Cortes de Pallás reservoir, on 6 April 2015. The hydroelectric power plant was damaged, and the main access road to the village of Cortes de Pallás was blocked for eight months. The predominant discontinuities of the rock mass were analyzed by means of the application of structure from motion (SfM) photogrammetry techniques to the set of images taken by remotely piloted aircraft systems (RPAS). The average size of the block was determined as 3.2 m in diameter and 17.6 m3 in volume. Additionally, a digital elevation model (DEM) was generated from an aerial laser scanning (ALS)-derived point cloud using a 1 × 1 grid. These data were implemented in RocPro3D software, obtaining the distances traveled by the blocks detached from different source areas at a cultural heritage site located near the rockfall event, which presents the same geological context. The simulation presented herein shows aggravating circumstances that endanger the cultural heritage area, with higher rockfall hazards than previous official studies (1991) displayed. View Full-Text
Keywords: rockfall; unmanned aerial vehicle (UAV); 3D point cloud (3DPC); SfM; 3D modeling; cultural heritage rockfall; unmanned aerial vehicle (UAV); 3D point cloud (3DPC); SfM; 3D modeling; cultural heritage
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Sarro, R.; Riquelme, A.; García-Davalillo, J.C.; Mateos, R.M.; Tomás, R.; Pastor, J.L.; Cano, M.; Herrera, G. Rockfall Simulation Based on UAV Photogrammetry Data Obtained during an Emergency Declaration: Application at a Cultural Heritage Site. Remote Sens. 2018, 10, 1923.

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