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Tsunami Hydrodynamics in the Columbia River
Civil and Environmental Engineering Faculty Publications and Presentations
  • Harry Yeh, Oregon State University
  • Elena Tolkova, University of Washington
  • David A. Jay, Portland State University
  • Stefan A. Talke, Portland State University
  • Hermann Fritz, Georgia Institute of Technology - Main Campus
Document Type
Post-Print
Publication Date
1-1-2012
Subjects
  • Tsunamis -- Oregon,
  • Columbia River
Abstract
On 11 March 2011, the Tohoku Tsunami overtopped a weir and penetrated 49 km up the Kitakami River, the fourth largest river in Japan. Similarly, the 2010 Chile tsunami propagated at least 15 km up the Maule River. In the Pacific Northwest of the United States, large tsunamis have occurred along the Cascadia subduction zone, most recently the 'orphan tsunami' of 1700 (Atwater et al.). The expected future occurrence of a Cascadia tsunami and its penetration into the Lower Columbia River became the subject of “the Workshop on Tsunami Hydrodynamics in a Large River” held in Corvallis, Oregon, 2011. We found that tsunami penetration into the Columbia River is quite different from a typical river. The tsunami enters the vast river estuary through the relatively narrow river mouth of the Columbia, which damps and diffuses its energy. The tsunami transforms into a long period, small amplitude wave that advances to Portland, 173 km from the ocean. Understanding this unique tsunami behavior is important for preparing a forthcoming Cascadia tsunami event.
Description

This is the author’s version of a work that was accepted for publication in the Journal of Disaster Research. The final publication is open access and available online at: http://www.fujipress.jp/finder/xslt.php?mode=present&inputfile=DSSTR000700050011.xml

Persistent Identifier
http://archives.pdx.edu/ds/psu/11861
Citation Information
Harry Yeh, Elena Tolkova, David A. Jay, Stefan A. Talke, et al.. "Tsunami Hydrodynamics in the Columbia River" (2012)
Available at: http://works.bepress.com/david_jay/28/