BASIC PHYSICS OF POINT RELEASE AVALANCHES
Point release avalanches, or loose snow slides, begin at one point on a slope and get progressively wider as they proceed down the slope. A fundamental characteristic that must be present for this type of avalanche to occur is a surface layer of cohesionless, or nearly cohesionless, snow (University of Colorado IBS 1975; Fredston and Fesler 1994). An initially small amount of snow begins to move downward when the force of gravity is greater than the forces of cohesion at a particular angle or when debris from above starts the s...
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...ditional weight of one skier crossing at a time.
BIBLIOGRAPHY FOR "THE PHYSICS OF AVALANCHES"
Daffern, T. 1983. Avalanche safety for skiers and climbers. Alpenbooks, Seattle, WA.
Fredston, J.A., and D. Fesler. 1994. Snow sense: a guide to evaluating snow avalanche hazard. Alaska Mountain Safety Center, Anchorage, AK.
Graydon, D., and K. Hanson, editors. 1997. Mountaineering: the freedom of the hills, sixth edition. The Mountaineers,
Perla, R.I., and M. Martinelli. 1976. Avalanche handbook. U.S. Department of Agriculture, Agriculture Handbook 489.
University of Colorado IBS (Institute of Behavioral Science). 1975. Snow avalanche hazard in the United States: a research assessment. Assessment of Research on Natural Hazards, Program on Technology, Environment, and Man, Monograph NSF-RA-E-75-017.
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