A five-year study was performed to compare conditions in the Pilchuck River before and after channel reconstruction associated with rerouting highway SR-2. The study focused on sediment particle-size analyses, benthic macro-invertebrates and fish. Substrates comparable to control areas developed in all portions of the new channel within one year after construction. The available data on invertebrates and fish gave no indication of deterioration in diversity, quantity or size in the reconstructed channel. The report provides recommendations for further improvements in the design of stream channel changes should there be no alternative to their construction.
August 5, 2007
Richard R. Horner, Eugene B. Welch.
University of Washington. Environmental Engineering and Science Program.
- # of Pages: 41 p., 630 KB (PDF)
- Subject: Benthos, Biodiversity, Channels (Waterways), Design, Environmental impacts, Environmental quality, Fishes, Grain size (Geology), Recommendations, Rivers, Sediments, Stream restoration, Streambeds, Substrates (Waterways)
- Keywords: Rivers, channel reconstruction, sediments, benthic macro-invertebrates, fish, impacts, Pilchuck River, SR 2.
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This abstract was last modified April 29, 2008