Effects of Snow Compaction on Water Release and Sediment Yield, Bridger Bowl Ski Area, Gallatin County, Montana

摘要

Little is known regarding the impact of ski compaction on runoff and sediment yield in downhill ski areas. This study uses a paired watershed approach to analyze the impact of snow compaction on runoff timing, hydrograph-peak height, and sediment yield. Results show that compacted snow releases water to streams 7-14 days later than uncompacted snow. The delay of snow melt from the compacted snow which reduces the rate of heat transfer by water movement, impedes the development of wet snow grains, and so delays the release of water. For the basins compared in this study, snow compaction had little effect on sediment yield.