Figure 21. Reach-segregated changes in bar area in the Umpqua River basin, Oregon, 1939–2005. Positive balance represents net bar area in each time period separated according to areas that were previously mapped as bars, and newly created bars that were previously mapped as water, flood plain, or bedrock. Negative balances represent total decreases in bar area, separated into areas that became water, bedrock, or flood plain. (A) Coast Range, (B) North Umpqua, (C) Garden Valley, (D) Roseburg, (E) Days Creek.

First posted September 29, 2011