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Monitoring of Water Accumulation in the Tête Rousse Glacier (French Alps) using 3D Magnetic Resonance ImagingNormal access

Authors: A. Legchenko, C. Vincent, J.M. Baltassat, S. Garambois, E. Thibert, A. Gilbert, M. Descloitres, J.F. Girard, O. Gagliardini and H. Guyard
Event name: Near Surface Geoscience 2012 – 18th European Meeting of Environmental and Engineering Geophysics
Session: Glacial Environments Characterization
Publication date: 03 September 2012
DOI: 10.3997/2214-4609.20143314
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 1.7Mb )
Price: € 20

Summary:
We have developed and tested a 3D Surface Nuclear Magnetic Resonance imaging method (3D-SNMR), which is a new non-invasive geophysical tool for investigating 3D water distribution in the subsurface. Between 2009 and 2011 this method was successfully applied to investigation of a glacier body. In the Tête Rousse glacier (Mont Blanc area in French Alps), we have detected a large cavern containing about 50000 m3 of water, representing potential danger for local population. Basing on our results water was pumped out. After the pumping, we carried out a one-year monitoring of the glacier. Results show that after being drained the cavern was fully refilled again in one year but its volume diminished about three folds. All 3D-SNMR results were found in a good agreement with boreholes and pumping results. At our knowledge it was the first time when the 3D-SNMR was used for investigating glaciers.


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