Item: Spatial variability of rutschblock results in avalanche start zones
Title: Spatial variability of rutschblock results in avalanche start zones
Proceedings: Proceedings of the 2004 International Snow Science Workshop, Jackson Hole, Wyoming
Authors: Cam Campbell and Bruce Jamieson, Department of Civil Engineering, Department of Geology and Geophysics University of Calgary
Abstract: During the winters of 2003 and 2004, 29 spatial arrays consisting of a total of 705 rutschblock tests were performed in avalanche start zones in the Columbia Mountains of British Columbia. Correlation analysis and multivariate least-squares linear regression were used to identify predictor variables as causes of variability. Snowpack variables that affected stability include slope angle and slab thickness. Stability, with respect to skier-triggering, tended to increase with slab thickness and decrease with increasing slope angle. Variability was found to increase with slope median rutschblock score. Fracture characteristics were found to be less variable than stability.
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Keywords: rutschblock test, fracture character, variability, start zones, avalanche forecasting, snow stability
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