TY - GEN
T1 - Digital terrestrial photogrammetry for a dense monitoring of the surficial displacements of a landslide
AU - Brezzi, Lorenzo
AU - Vallisari, Davide
AU - Carraro, Edoardo
AU - Teza, Giordano
AU - Pol, Antonio
AU - Liang, Zhipeng
AU - Zhou, Jian
AU - Gabrieli, Fabio
AU - Cola, Simonetta
AU - Galgaro, Antonio
N1 - Funding Information:
The authors acknowledge financial support from the Fondazione Cariverona thought the research grant “Monitoraggio di dissesti naturali ed opere di difesa con tecniche di computer vision per la sicurezza e la salvaguardia dell’ambiente” and the financial support given by the Veneto Region thought the grant "Supporto scientifico per la caratterizzazione del rischio idrogeologico e la valutazione dell'efficacia degli interventi relativamente al fenomeno franoso della Busa del Cristo a Perarolo di Cadore (BL) mediante predisposizione di modelli geo-idrologici previsionali".
Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2021/9/6
Y1 - 2021/9/6
N2 - A new method for measuring spatially dense surface displacements of a landslide at daily intervals and over a long period of time is here presented. The method allows the evaluation of displacements based on a digital image correlation technique applied to a temporal sequence of photos, daily captured by one or more fixed cameras. In comparison to other topographical method this new procedure has a lower accuracy, but provides distributed daily measurements, spatially very dense over the entire landslide area. The multi-view configuration also allows the reconstruction and the update of the 3D surface of the landslide. This work presents some preliminary results obtained by applying this innovative technique to a complex landslide located in the municipality of Perarolo di Cadore (NE Italy), also known as Sant'Andrea landslide. The landslide is characterized by active slow movements involving detrital deposits, about 30 m thick, overlying gypsum-anhydrite rocks. Its activity is strongly correlated to both heavy and long-lasting rain events and to its particular geological conditions. Recently, the alternating phases characterized by slow movements and significant accelerations led to a progressive enlargement of the affected area. Three cameras installed on a stable slope facing the landslide allow to record the intermittent activity and the peculiar behaviour of different parts of the slope. The displacements thus obtained are also compared with those deriving from conventional techniques. Finally, the accuracy of this new method is discussed.
AB - A new method for measuring spatially dense surface displacements of a landslide at daily intervals and over a long period of time is here presented. The method allows the evaluation of displacements based on a digital image correlation technique applied to a temporal sequence of photos, daily captured by one or more fixed cameras. In comparison to other topographical method this new procedure has a lower accuracy, but provides distributed daily measurements, spatially very dense over the entire landslide area. The multi-view configuration also allows the reconstruction and the update of the 3D surface of the landslide. This work presents some preliminary results obtained by applying this innovative technique to a complex landslide located in the municipality of Perarolo di Cadore (NE Italy), also known as Sant'Andrea landslide. The landslide is characterized by active slow movements involving detrital deposits, about 30 m thick, overlying gypsum-anhydrite rocks. Its activity is strongly correlated to both heavy and long-lasting rain events and to its particular geological conditions. Recently, the alternating phases characterized by slow movements and significant accelerations led to a progressive enlargement of the affected area. Three cameras installed on a stable slope facing the landslide allow to record the intermittent activity and the peculiar behaviour of different parts of the slope. The displacements thus obtained are also compared with those deriving from conventional techniques. Finally, the accuracy of this new method is discussed.
UR - http://www.scopus.com/inward/record.url?scp=85115141960&partnerID=8YFLogxK
U2 - 10.1088/1755-1315/833/1/012145
DO - 10.1088/1755-1315/833/1/012145
M3 - Contribution to proceedings
AN - SCOPUS:85115141960
VL - 833
T3 - IOP Conference Series: Earth and Environmental Science
BT - IOP Conference Series. Earth and Environmental Science
T2 - EUROCK 2021 Conference on Rock Mechanics and Rock Engineering from Theory to Practice
Y2 - 20 September 2021 through 25 September 2021
ER -