CGRG Bibliography of Canadian Geomorphology
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Author : Cheng, J.D.
Date : Undated.
Title : Streamflow changes after salvage logging of a mountain pine beetle infested watershed in Southern British Columbia, Canada.
Publication : Unpublished draft paper, Research Section, Ministry of Forests, Kamloops, B.C.
Issue :
Page(s) :
Abstract
The paired or control watershed technique was used to assess the streamflow changes of Camp Creek, and Okanagan headwater stream in interior British Columbia after salvage logging occurred over 30% of its 33.9 km2 watershed, by analyzing its existing hydrometric data and those of an adjacent control, the Greata Creek for both the 1971-76 pre-logging and 1978-83 post-logging periods. The results indicate that the post-logging Camp Creek streamflow changes are characterized by increases in annual peak flows as well as advancements in the timing of peak flows and half-flow-volume occurrence dates. Although not all of the streamflow changes are statistically significant at the commonly used 95% confidence levels, the directions and magnitudes of post-logging streamflow increases are apparent and consistent, and, more importantly, in good agreement with findings of most watershed experiments. The results provide an additional strong evidence indicating that a forested watershed, regardless of its size, will yield more water if a sufficient portion of its total area is clearcut. Possible causes related to the streamflow changes are discussed.
Bibliography of Canadian Geomorphology