The Mt. Mansfield paired-watershed study

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Presentation transcript:

The Mt. Mansfield paired-watershed study

How does alpine development affect hydrology?

Water yield responses due to forest harvesting in the Eastern U.S. Comparison to other paired watershed studies in Eastern US This graph represents the change in water yield between pre-forest harvesting and the first year after forest harvesting. Other study locations include Hubbard Brook, Marcell, Fernow, Leading Ridge The x-axis displays the percent forest area cleared and the increase in water yield after harvesting is on the y-axis Adapted from Hornbeck et al., 1993. Journal of Hydrology, 150:323-344.

Annual Runoff Comparisons Ground breaking on Spruce Peak development begins, late summer 2003 Water yield discrepancy bar graph This graph represents the differences in water yield between the two basins from water year 2000 through 2006, where West Branch consistently exceeds the yield of Ranch Brook. The water yield differences range from 18 to 36 % Note: Snowmaking only represents 3-4% of the precipitation

Water yield responses due to forest harvesting in the Eastern U.S. Comparison to other paired watershed studies in Eastern US This graph represents the change in water yield between pre-forest harvesting and the first year after forest harvesting. Other study locations include Hubbard Brook, Marcell, Fernow, Leading Ridge The x-axis displays the percent forest area cleared and the increase in water yield after harvesting is on the y-axis Adapted from Hornbeck et al., 1993. Journal of Hydrology, 150:323-344 Mt. Mansfield data from Wemple et al., 2007.

Does rainfall explain water yield differences? Summer 2002 Precipitation data for RB and WB Trends in rainfall in millimeters with elevation No difference was determined between rainfall precip-trends between these two basins Summer 2003 Data from Mills, 2004 (unpublished thesis)

Does snow explain water yield differences?

study motivation How does recreational development in NE mountainous terrain impact the environment? Specifically, how do ski resort developments affect the hydrologic cycle? Forests in New England are under pressure due to increases in development and population