Item: A statistical analysis of the effectiveness of air blasts and surface blasts in producing avalanches
Title: A statistical analysis of the effectiveness of air blasts and surface blasts in producing avalanches
Proceedings: 1990 International Snow Science Workshop, Bigfork, Montana USA, October 9-13
Authors: George Austiguy
Abstract: To address the relative effectiveness of aerial charges compared with surface charges in producing snow avalanches, control route data obtained from Bridger Bowl Ski Area was used to determine percentage values for each delivery method with respect to appropriate parameters. These parameters include release occurrences, size of the slide, percent of the total avalanche that slid and the layers penetrated. Two pound and four pound charges were considered. The results indicate that two pound air charges are more effective at releasing avalanches than two pound hand charges, while for four pound charges both delivery methods perform equally. Neither the delivery method nor the size of the charge seems to effect the size of the avalanche. The layers penetrated are influenced by the size of the charge but not seemingly by the delivery method. Lastly the air charges release a greater % of the total avalanche path than hand charges.
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Keywords: air blasts, surface blasts, avalanches, aerial charges, surface charges
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