Item: Terrain parameters of avalanche starting zones and their effect on avalanche frequency
Title: Terrain parameters of avalanche starting zones and their effect on avalanche frequency
Proceedings: Proceedings of the 1994 International Snow Science Workshop, Snowbird, Utah, USA
Authors: J. Andrew Gleason
Abstract: Avalanche frequency data for 44 avalanche paths on Lone Mountain in southwest Montana were correlated with data on the terrain features of avalanche starting zones to determine which terrain parameters affect avalanche frequency. Over 3500 individual avalanche events were used in this study. The data were separated into two groups based on artificial and natural release. In the natural release group the parameters that influenced frequency included: altitude, aspect with respect to dominant wind direction, geometry of the starting zone and slope angle. These variables explained 62 percent of the variance correlating the terrain parameters to avalanche frequency. In the artificial release group the significant parameters included: the number of bomb events, altitude, aspect of dominant wind direction and slope angle. These variables explained 83 percent of the variance.
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Keywords: starting zones, terrain, artificial release, artificial release
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