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(Article of periodic en Anglais - 2013)

Document title

A spatial and temporal analysis of different periglacial materials by using geoelectrical, seismic and borehole temperature data at Murtèl–Corvatsch, Upper Engadin, Swiss Alps

Authors(s) and Affiliation(s)

SCHNEIDER S. (1) ; DAENGELI S. (1) ; HAUCK C. (1) ; HOELZLE M. (1) ;
(1) Alpine Cryosphere and Geomorphology (ACAG), Dept of Geosciences, Univ., Fribourg, SUISSE

Abstract

To detect the small-scale variations of permafrost characteristics and its varying sensitivity to climate influencing factors, 2 electrical resistivity tomography (ERT) and refraction seismic tomography (RST) monitoring profiles were installed in 2009 at 2 sites, Chastelets and Murtèl forefield, in eastern Swiss Alps. The geophysical profiles extend over 4 existing boreholes and are characterized by strong small-scale variations of surface as well as subsurface structures such as bedrock, fine material or coarse debris. Here the AA. present ERT measurements carried out in a bimonthly interval during the years of 2009 to 2012 and RST measurements which were performed once a year, normally in August, during the same period. Based on these data sets the so-called four-phase model, based on petrophysical relationships, was applied to determine the volumetric fractions of ice, water and air within the heterogeneous ground, resulting in a relatively precise description of the subsurface material around the existing boreholes

Source

Article of periodic

published at : Geographica helvetica / ISSN 0016-7312 / CODEN GGHVA4

Editor : Kummerly and Frey, Bern - SUISSE (1946)

Millesime : 2013, vol. 68, no4 [pp. 265-280]

Bibliographic references : 2 p.

Collation : 10 fig., 1 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 3552

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.5194/gh-68-265-2013

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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