Monitoring of Water Accumulation in the Tête Rousse Glacier (French Alps) using 3D Magnetic Resonance Imaging
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
Info: Extended abstract, PDF ( 1.7Mb )
Price: € 20
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.