Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-3/W3, 391-397, 2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
19 Aug 2015
E. Dall’Asta1, R. Delaloye2, F. Diotri3, G. Forlani1, M. Fornari1, U. Morra di Cella3, P. Pogliotti3, R. Roncella1, and M. Santise1 1DICATeA, University of Parma, 43124 Parma (PR), Italy
2University of Fribourg, Department of Geosciences, Geography Unit, ch. du Musée 4, 1700 Fribourg, Switzerland
3Environmental Protection Agency of Valle d'Aosta – Climate Change Unit, Italy
Keywords: UAS, Rock Glacier, Monitoring, Hazard, Automation Abstract. Photogrammetry has been used since long time to periodically control the evolution of landslides, either from aerial images as well as from ground. Landslides control and monitoring systems face a large variety of cases and situations: in hardly accessible environments, like glacial areas and high mountain locations, it is not simple finding a survey method and a measurement control system, which are capable to reliably assess, with low costs, the expected displacement and its accuracy. For this reason, the behaviour of these events presents the geologists and the surveyor each time with different challenges. The use of UAS (Unmanned Aerial System) represents, in this context, a recent and valid option to perform the data acquisition both in safety and quickly, avoiding hazards and risks for the operators while at the same time containing the costs. The paper presents an innovative monitoring system based on UAS-photogrammetry, GNSS survey and DSM change detection techniques to evaluate the Gran Sommetta rock glacier surface movements over the period 2012-2014. Since 2012, the surface movements of the glacier are monitored by ARPAVdA (a regional environmental protection agency) as a case study for the impact of climate change on high-mountain infrastructures. In such scenarios, in fact, a low-cost monitoring activity can provide important data to improve our knowledge about glacier dynamics connected to climate changes and to prevent risks in anthropic Alps areas. To evaluate the displacements of the rock glacier different techniques were proposed: the most reliable uses the orthophoto of the area and rely on a manual identification of corresponding features performed by a trained operator. To further limit the costs and improve the density of displacement information two automatic procedures were developed as well.
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Citation: Dall’Asta, E., Delaloye, R., Diotri, F., Forlani, G., Fornari, M., Morra di Cella, U., Pogliotti, P., Roncella, R., and Santise, M.: USE OF UAS IN A HIGH MOUNTAIN LANDSCAPE: THE CASE OF GRAN SOMMETTA ROCK GLACIER (AO), Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-3/W3, 391-397,, 2015.

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