Watershed Resources Specialist, City of Portland Water Bureau, Sandy River Station, 10991 S.E. Lusted Road, Sandy, Oregon 97055.
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FOG DRIP, WATER YIELD, AND TIMBER HARVESTING IN THE BULL RUN MUNICIPAL WATERSHED, OREGON†
Article first published online: 8 JUN 2007
DOI: 10.1111/j.1752-1688.1985.tb00158.x
Issue
1752-1688/asset/cover.gif?v=1&s=6d8ba4f05904371bea7c7a5b8a47404bf9279832 "JAWRA Journal of the American Water Resources Association")
JAWRA Journal of the American Water Resources Association
Volume 21, Issue 3, pages 469–473, June 1985
Additional Information
How to Cite
Ingwersen, J. B. (1985), FOG DRIP, WATER YIELD, AND TIMBER HARVESTING IN THE BULL RUN MUNICIPAL WATERSHED, OREGON. JAWRA Journal of the American Water Resources Association, 21: 469–473. doi: 10.1111/j.1752-1688.1985.tb00158.x
- †
Paper No. 84232 of the Water Resources Bulletin. Discussions are open until February 1, 1986.
- ‡
Watershed Resources Specialist, City of Portland Water Bureau, Sandy River Station, 10991 S.E. Lusted Road, Sandy, Oregon 97055.
Publication History
- Issue published online: 8 JUN 2007
- Article first published online: 8 JUN 2007
- Abstract
- References
- Cited By
Keywords:
- fog interception;
- timber harvest;
- water yield
ABSTRACT
Analysis of recent streamflow data from the Fox Creek Experimental Watersheds in the Bull Run Municipal Watershed, Oregon, indicates a significant recovery from the impacts on summer water yield due to a loss of fog drip upon timber harvesting. Measurable impacts and their associated recovery are notable only during the months of June and July. Recovery begins about five or six years following harvest, possibly due to renewed fog drip from prolific revegetation. Watershed positioning with respect to prevailing weather systems and the extent of burning or removal of slash and residual vegetation during logging appear to be important factors in predicting the impact of fog drip reduction associated with planned harvest. Apparently, once the temporary reduction in summer yield is offset by renewed fog drip, the expected increase in yield due to decreased evapotranspiration can be observed. Redistribution of fog drip may be a major factor in the measurements of local interception and water yield.