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Affiner la recherche Interroger des sources externesMulti-method monitoring of Glacier d’Argentière dynamics / Lionel Benoit in Annals of Glaciology, vol 56 n° 70 (October 2015)
Titre : Multi-method monitoring of Glacier d’Argentière dynamics Type de document : Article/Communication Auteurs : Lionel Benoit Année de publication : 2015 Projets : Géocubes / Article en page(s) : pp 118 - 128 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] Alpes (France)
[Termes IGN] glacier
[Termes IGN] surveillance hydrologique
[Termes IGN] vitesseRésumé : (auteur) The flow of Glacier d'Argentière, French Alps, has been extensively studied by glaciologists for >100 years, but high-temporal- and high-spatial-resolution monitoring of its dynamics has rarely been carried out. In this paper, the terminal part of the main glacier was selected to undertake such a survey. The 2 month experiment (September–November 2013) included remote sensing to map the velocity field of the whole area, and a network of in situ measurements to record the ice velocity at the surface as well as at the base of the glacier with high precision and at high temporal resolution. These monitoring methods are combined to produce a comprehensive and reliable picture of the ice flow. Basal and surface in situ measurements are used to precisely monitor the temporal variability of the ice flow at a section of the glacier where crevassed areas and non-cracked ice coexist. The achieved results are an innovative and efficient tool to investigate the acceleration/deceleration pattern heterogeneities in ice flow that occur after heavy rainfall. Numéro de notice : A2015--065 Affiliation des auteurs : IGN+Ext (2012-2019) Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.3189/2015AoG70A985 Date de publication en ligne : 26/07/2017 En ligne : http://dx.doi.org/10.3189/2015AoG70A985 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83257
in Annals of Glaciology > vol 56 n° 70 (October 2015) . - pp 118 - 128[article]Documents numériques
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Titre : Monitoring landslide displacements with the Geocube wireless network of low-cost GPS Type de document : Article/Communication Auteurs : Lionel Benoit Année de publication : 2015 Projets : Géocubes / Article en page(s) : pp 111 – 121 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] effondrement de terrain
[Termes IGN] Géocube
[Termes IGN] onde sismique
[Termes IGN] précipitation
[Termes IGN] séismeRésumé : (auteur) The analysis of landslide hazard requires continuous and high frequency surface displacement monitoring at numerous and geomorphologically relevant locations. Ground-based geodetic methods (GNSS, tacheometry) allow very accurate and high frequency temporal observations while remote sensing methods (InSAR, terrestrial and satellite photogrammetry, LIDAR) allow spatially distributed observations at high spatial resolution. A single surface deformation monitoring technique coupling all these capabilities is still missing.
The Geocube system has been designed to partly overcome this pitfall by creating a low-cost, flexible, easy to install and wireless GPS receiver. Dense Geocube monitoring networks can be set easily for operational observations. Furthermore, the monitoring of other landslide properties (micro-seismicity, seismic waves) or triggering factors (meteorology, slope hydrology) is possible with the capacity of integrating additional sensors to the Geocube.
This work presents the Geocube system and the results of a field campaign performed during the summer 2012 at the Super-Sauze landslide, southern French Alps, with a network of wireless low-cost GPS. The objective was to assess the performance of the Geocube system in real field monitoring conditions. Our results document the spatial and temporal evolution of the landslide during a period of 40 days. Landslide acceleration periods are detected and correlated to rainfall events.Numéro de notice : A2015--064 Affiliation des auteurs : IGN+Ext (2012-2019) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.enggeo.2015.05.020 Date de publication en ligne : 06/06/2015 En ligne : http://dx.doi.org/10.1016/j.enggeo.2015.05.020 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83253
in Engineering Geology > vol 195 (September 2015) . - pp 111 – 121[article]
