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Monitoring of periglacial phenomena in the furggentälti Swiss Alps

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  • Bernhard Krummenacher
  • Klaus Budmiger

Abstract

A monitoring system for periglacial phenomena has been installed in the Furggentälti (Gemmi) Swiss Alps in the framework of geomorphological field studies aimed at the instruction of students. Various periglacial landforms and processes can be observed in an area of about 1 km2. The research layout includes a survey station for soil and air temperatures, a geodetic surveying triangulation network of a solifluction lobe, and photogrammetric analysis of the soil frost pattern dynamics (stone rings) and a small rock glacier. Geophysical explorations (geoelectric and seismic refraction) and BTS measurements are undertaken on the rock glacier; these measurements have ascertained the presence of permafrost. The temperature survey station records values at levels between 1 m beneath the surface and 1.5 m above the surface; this allows correlation between displacement values of the solifluction lobe and the soil temperatures. Un système de surveillance pour divers phénomènes périglaciaires a été installé dans les Alpes suisses de Furggentälti (Gemmi) dans le cadre d'études geomorphologiques poursuivies pour l'enseignement. Des formes de terrain et des processus variés ont été observés dans une région d'environ 1 km2. Les observations de base comprennent une station de mesure de température du sol et de l'air, un réseau géodésique de triangulation d'un lobe de solifluxion, l'analyse de la dynamique de cercles de pierres ainsi que celle d'un petit lobe de glacier rocheux. Des recherches géophysiques (géoélectriques et de réfraction séismique) et des mesures de température sous la couverture neigeuse ont été entreprises sur le glacier rocheux; ces mesures ont attesté la présence d'un pergélisol. Les mesures de température sont effectuées à différents niveaux s'étendant de 1 m jusqu'à 1 m 50 au‐dessus de la surface du sol. Ces mesures permettent d'établir une corrélation entre les valeurs de déplacement du lobe de solifluxion et les températures de sol.

Suggested Citation

  • Bernhard Krummenacher & Klaus Budmiger, 1992. "Monitoring of periglacial phenomena in the furggentälti Swiss Alps," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 3(2), pages 149-155, April.
  • Handle: RePEc:wly:perpro:v:3:y:1992:i:2:p:149-155
    DOI: 10.1002/ppp.3430030213
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