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Université de Fribourg

Automated time-lapse ert for improved process analysis and monitoring of frozen ground

Hilbich, Christin ; Fuss, C. ; Hauck, Christian

In: Permafrost and Periglacial Processes, 2011, vol. 22, no. 4, p. 306–319

A new automated electrical resistivity tomography (A-ERT) system is described that allows continuous measurements of the electrical resistivity distribution in high-mountain or polar terrain. The advantages of continuous resistivity monitoring, as opposed to single measurements at irregular time intervals, are illustrated using the permafrost monitoring station at the Schilthorn, Swiss Alps. Data...

Université de Fribourg

Applicability of electrical resistivity tomography monitoring to coarse blocky and ice-rich permafrost landforms

Hilbich, Christin ; Marescot, L. ; Hauck, Christian ; Loke, M. H. ; Mäusbacher, R.

In: Permafrost and Periglacial Processes, 2009, vol. 20, no. 3, p. 269-284

The inversion and interpretation of electrical resistivity tomography (ERT) data from coarse blocky and ice-rich permafrost sites are challenging due to strong resistivity contrasts and high contact resistances. To assess temporal changes during ERT monitoring (ERTM), corresponding inversion artefacts have to be separated from true subsurface changes. Appraisal techniques serve to analyse an ERTM...