The objective of this study is to evaluate effectiveness of forest practices rules and State Forest management strategies in protecting stream temperature and promoting riparian structure that provides necessary functions for the protection of fish and wildlife habitat. The project is evaluating both privately and state-owned forestland. On privately owned forestland, riparian management areas are being managed under forest practice rules as described in the Forest Practices Act. On state-owned forestland, riparian management areas are being managed using riparian and aquatic strategies as described in the Northwest State Forests Management Plan. This project is evaluating stream temperature and riparian condition two years before and five years after harvesting. Field work began in 2002 and was completed by 2010.
RipStream Analysis Results
Pre-harvest study site conditions and temperature patterns are described in the following peer-reviewed manuscript (full article):
Dent, L., D. Vick, K. Abraham, S. Shoenholtz, and S. Johnson. 2008. Summer temperature patterns in headwater streams of the Oregon Coast Range. Journal of the American Water Resources Association 44: 803-813.
Initial post-harvest analysis of stream temperatures relative to the Oregon Department of Environmental Quality’s permissible stream temperature change threshold, the Protecting Cold Water Criterion (full article):
Groom, J.D., L. Dent, and L.J. Madsen. 2011. Stream temperature change detection for state and private forests in the Oregon Coast Range. Water Resources Research 47: W01501, doi:10.1029/2009WR009061.
The magnitude of temperature warming during the first two years post-harvest and relationship to changes in stream shade and other site characteristics. The analysis also examined the relationship between shade and riparian vegetation characteristics post-harvest (full article):
Groom, J.D., L. Dent, and L.J. Madsen. 2011. Response of western Oregon stream temperatures to contemporary forest management. Forest Ecology and Management, doi:10.1016/j.foreco.2011.07.012
Systematic Review Report
This systematic review synthesizes the evidence from scientific studies concerning the effectiveness of different riparian buffer types at protecting cold water or riparian shade. SR_Report
Czarnomski, N., C.V. Hale, W.T. Frueh, M. Allen, J. Groom. 2013. Effectiveness of Riparian Buffers at Protecting Stream Temperature and Shade in Pacific Northwest Forests: A Systematic Review. Final Report September 2013.