Geomorphic mapping of the Columbia and Willamette River floodplains—connecting landforms to processesRead Now
Geomorphic mapping of the Columbia and Willamette River floodplains—connecting landforms to processes.
Tuesday, December 18th
Noon to 1:00 pm
Portland Building Auditorium
1120 SW Fifth Ave., 2nd Floor
Portland, OR 97204
The Columbia and Willamette are shaped by a striking array of physical and biological processes. Recent, highly detailed, geomorphic mapping of the Lower Columbia River and portions of the Willamette River are revealing landforms created by geologic processes that work over a variety of temporal and spatial scales—from the ice-age Missoula Floods, which defined overall valley geometry, to annual freshets that build channel-flanking sand bars.
This mapping aids conservation strategies by providing an inventory of landforms and associated habitats; a basis for evaluating alterations and trajectories; and, most importantly, a framework for linking habitats and landforms to specific formative processes, thereby equipping managers with data needed to achieve realistic and sustainable objectives.
Join Jim O’Connor, research hydrologist with the U.S. Geological Survey, as he describes how our area’s newest mapping is shedding light on conservation opportunities.