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Monitoring Turtle Mountain using ground-based synthetic aperture radar (GB-InSAR)

John F. Dehls, Davide Giudici, Francesco Mariotti, Paolo Farina, Derek Martin, Corey Froese

In the proceedings of: GEO2010 Calgary: 63rd Canadian Geotechnical Conference & 6th Canadian Permafrost Conference

Session: T2-B

ABSTRACT: As early as the 1930s, a portion of Turtle Mountain known as South Peak was identified as a hazard, threatening the town of Frank, Alberta, with 5 million cubic metres of rock. Since 2005, the Alberta Geological Survey has operated a program dedicated to the long-term monitoring of the mountain. In 2009, a ground-based synthetic aperture radar (GB-InSAR) system was installed to map displacements on the slope. The GB-InSAR system is an important supplement to existing monitoring systems on Turtle Mountain. Atmospheric effects have been successfully modelled and removed from the interferograms, allowing displacements on the order of 1 mm/year to be measured. The system does not provide useful information when the slope is covered with snow; therefore, it cannot be used as a year-round monitoring system.

RÉSUMÉ: Dès le début des années 1930, la pointe sud « South Peak » de la Montagne Turtle fut reconnue comme un danger naturel, menaçant la ville de Frank, Alberta, avec 5 millions de mètre cube de roche. Depuis 2005, la Commission Géologique de l'Alberta a démarré un programme dédié à la surveillance de la montagne à long terme. En 2009, un système comprenant un radar terrestre à ouverture synthétique (GB-InSAR) a été installé pour cartographier les mouvements sur la pente. Le GB-InSAR est un supplément important aux systèmes de surveillance déjà en place sur la Montagne Turtle. Les effets atmosphériques ont été modélisés avec succès et ont été soustraits des interférogrammes, ainsi permettant de mesurer des déplacements de l'ordre de 1 mm/an. Le système de surveillance ne peut toutefois être utilisé à longueur d'année puisqu'il ne fournit pas d'information utile lorsque la pente est recouverte de neige.

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Cite this article:
John F. Dehls; Davide Giudici; Francesco Mariotti; Paolo Farina; Derek Martin; Corey Froese (2010) Monitoring Turtle Mountain using ground-based synthetic aperture radar (GB-InSAR) in GEO2010. Ottawa, Ontario: Canadian Geotechnical Society.

@article{GEO2010_218, author = John F. Dehls; Davide Giudici; Francesco Mariotti; Paolo Farina; Derek Martin; Corey Froese,
title = Monitoring Turtle Mountain using ground-based synthetic aperture radar (GB-InSAR) ,
year = 2010
}