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Rights Statements InC/1.0 , Open Access
Journal article
Measurement of differences in snow accumulation, melt, and micrometeorology due to forest harvesting
Northwest science., Vol.73, pp.87-101
1999
Handle:
https://hdl.handle.net/2376/1172
Abstract
Previous studies in the Pacific Northwest have suggested a link between forest logging and increased streamflows. We present a brief overview of previous experimental efforts designed to identify mechanisms for these increases, especially during rain-on-snow (ROS) and spring snowmelt events. To extend the applicability of these data, we describe our measurement of snow accumulation, melt, and micrometeorology in existing uncut forest and shelterwood units as part of the Demonstration of Ecosystem Management Options (DEMO) study. Uncut forest units are dominated by over 100-year-old Douglas-fir (Pseudotsuga menziesii) with stand basal areas of ca. 40 m2/ha. Micrometeorology is measured 2 m above the ground surface in each 13-ha unit. Snow accumulation and melt are measured via weekly snow courses. Snowpack outflow is obtained from two 2.6 m2 non-weighing snow lysimeters in each unit. Large (25 m2) weighing lysimeters provide a continuous record of snowpack evolution at scales unaffected by variability in canopy throughfall. Snow interception is measured by continuous weighing of cut trees. Harvest treatments will be imposed during summer 1998 and additional post-harvest data will be collected. Pre-harvest data indicate up to 60% greater (33 mm) 3-day production of runoff and 150% greater (22 mm) 3-day snowmelt (outflow minus throughfall) in the shelterwood than in the uncut forest unit during ROS events. Snowmelt during radiation-dominated spring events is ca. 50% greater (15 mm) in the shelterwood. Results from the weighing lysimeters show high correlation with snow course data from the shelterwood but poor correlation with those from the uncut forest due to small scale spatial variability in tree canopy cover
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Details
- Title
- Measurement of differences in snow accumulation, melt, and micrometeorology due to forest harvesting
- Creators
- Pascal Storck (Author)Travis Kern (Author)Susan Bolton (Author)
- Publication Details
- Northwest science., Vol.73, pp.87-101
- Academic Unit
- Northwest Science
- Publisher
- WSU Press
- Identifiers
- 99900502150501842
- Copyright
- In copyright ; openAccess ; http://rightsstatements.org/vocab/InC/1.0/ ; http://purl.org/eprint/accessRights/OpenAccess
- Language
- English
- Resource Type
- Journal article