Feick S, Mitterer C, Dreier L, Harvey S, Schweizer J (2012)
Publication Language: English
Publication Type: Conference contribution, Conference Contribution
Publication year: 2012
Pages Range: -
Conference Proceedings Title: Proceedings ISSW 2012
Event location: Anchorage, Alaska (USA)
On steep slopes the full snowpack can glide on the ground, tension cracks may open and eventually the slope fails as full-depth avalanche (glide-snow avalanche). Many observations have shown that a thin wet layer reduces friction between the snow-soil interface leading to snow gliding. The occurrence, however, of glide cracks and their evolution to glide avalanches are still poorly understood. Permanent monitoring of glide cracks seems most promising for predicting snow gliding and full-depth avalanches. We evaluated whether glide cracks can be automatically detected and mapped for a large area using optical satellite images with very high spatial resolution. Two approaches were tested for a 25 km2 scene from panchromatic satellite sensor WorldView-1 acquired over a test site in the Eastern Swiss Alps. Both approaches integrate image information and topographic variables derived from a digital elevation model. The first approach is based on statistical modeling techniques; the second one included an object-based image analysis. Both approaches achieved encouraging detection and mapping accuracies even though certain limitations exist. Furthermore, images from temporal high resolution time-lapse photography of two slopes that are known for gliding-snow events were used to monitor glide-crack evolution and glide-avalanche occurrence.
APA:
Feick, S., Mitterer, C., Dreier, L., Harvey, S., & Schweizer, J. (2012). Automated detection and monitoring of glide-snow events using satellite-based optical remote sensing and terrestrial photography. In Proceedings ISSW 2012 (pp. -). Anchorage, Alaska (USA).
MLA:
Feick, Sebastian, et al. "Automated detection and monitoring of glide-snow events using satellite-based optical remote sensing and terrestrial photography." Proceedings of the International Snow Science Workshop, Anchorage, Alaska (USA) 2012. -.
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