Figure 23. Aerial imagery of the Molalla River, Oregon, in geomorphic reach 4 (GR4) just upstream of Highway 213 bridge (FPkm 19.5) to about FPkm 23 in (A) 1948 and (B) 2009. (Some hydrologic high-flow event, a pulse of sediment and aggradation, or a combination of both led to a wide active channel and expansive gravel bars in 1948; subsequent revegetation decreased the active-channel width and increased sinuosity by 2009.)

First posted February 29, 2012