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

Special issue : In honour of Professor Charles harris

Auteur(s) et Affiliation(s)



Description :
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. Results from a one-year dataset show small temporal changes during periods with snow cover, and the largest changes during snowmelt in early summer and during freezing in autumn, which are in phase with changes in either near-surface soil moisture or subsurface temperature. As a result of its cost-effective ability to monitor freezing and thawing processes even at greater depths, the new A-ERT system can be widely applied in permafrost regions.


Type de document :
Article de monographie

Source :
Permafrost and periglacial processes, issn : 1045-6740, 2011, vol. 22, n°. 4, p. 306-319, nombre de pages : 14, Références bibliographiques : 1 p.

Date :
2011

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley