Past, Present and Future Monitoring at the Vallcebre Landslide (Eastern Pyrenees, Spain)
Por:
A. Gili, Josep, Moya, J, Corominas, J, Crosetto, M, Monserrat, O
Publicada:
1 ene 2021
Resumen:
Featured Application
Monitoring of very slow landslides with Classical and Novel Techniques.
Works carried out to monitor the displacements of the Vallcebre landslide (Pyrenees range, NE of Spain) since 1987 are presented. The landslide, which extends over an area of about 0.8 km(2) and affects more than 20 x 10(6) m(3), has experienced displacements of up to one meter per year in some points and periods. It has been periodically monitored since 1987, using a wide range of surface and in-hole techniques: triangulation with theodolite, Terrestrial Photogrammetry, Electronic Distance Measurement, GNSS-GPS, inclinometers, wire extensometers, piezometers, DInSAR (satellite) and GBSAR (terrestrial). The results obtained using new techniques are compared with those obtained with GNSS-GPS and a wire extensometer, and checked against fixed stable points. From this comparison, we conclude that even though wire extensometers and inclinometers may have the highest precision, in practice, all systems play potentially valuable roles in providing meaningful data for monitoring at different study stages. In the near future, we envisage the installation of a Distributed Fiber Optic array to monitor the risk with a certain space and time continuity. After the evaluation of the precision and advantages of the different methods, the complementary use of some of them is strongly recommended.
Filiaciones:
Moya, J:
Tech Univ Catalonia UPC BarcelonaTech, Div Geotech Engn & Geosci, Dept Civil & Environm Engn, Barcelona 08034, Spain
Corominas, J:
Tech Univ Catalonia UPC BarcelonaTech, Div Geotech Engn & Geosci, Dept Civil & Environm Engn, Barcelona 08034, Spain
Crosetto, M:
Ctr Tecnol Telecomunicac Catalunya CTTC CERCA, Remote Sensing Dept, Geomat Div, Barcelona 08860, Spain
Monserrat, O:
Ctr Tecnol Telecomunicac Catalunya CTTC CERCA, Remote Sensing Dept, Geomat Div, Barcelona 08860, Spain
Department of Civil and Environmental Engineering, Division of Geotechnical Engineering & Geosciences, Technical University Catalonia (UPC-BarcelonaTech), Barcelona, 08034, Spain
Remote Sensing Department, Geomatics Division, Centre Tecnològic Telecomunicacions Catalunya (CTTC/CERCA), Castelldefels, 08860, Barcelona, Spain
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