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Scientific Investigations Report 2011–5041

Channel Change and Bed-Material Transport in the Umpqua River Basin, Oregon

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Figure 25. Patterns of vegetation colonization on bare gravel bars in the Umpqua River basin, Oregon, 1939–2005, by reach. Positive balance indicates total area of bare bars in each period; decreases in vegetation lead to increases in the area of bare gravel. Negative balance indicates areas where bare gravel was colonized with vegetation.

First posted September 29, 2011

For additional information contact:
Utah Water Science Center Director,
U.S. Geological Survey, 2329 West Orton Circle
West Valley City, UT
84119-2047
http://ut.water.usgs.gov

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