Fluvial Biogeomorphic Evolution of the Upper South Fork Toutle River, WA After the 1980 Eruption of Mount St. Helens

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dc.contributor.advisorFonstad, Mark
dc.contributor.authorProctor, Sarah
dc.date.accessioned2017-05-01T15:27:50Z
dc.date.available2017-05-01T15:27:50Z
dc.date.issued2017-05-01
dc.description.abstractThe eruption of Mount St. Helens in 1980 severely impacted the woody vegetation within the geomorphic floodplain as well as the morphology of the Upper South Fork Toutle River. Historic aerial imagery and LiDAR data were used in combination to create snapshots of the channel and vegetation in 1980, 1983, 1996, 2003, and 2014. This data was mapped and analyzed using GIS, with the primary focus on 2D channel change, vegetation change, and channel-vegetation interactions from 1980 to 2014. No vegetation was discernable in 1980-83 but the vegetation present in 1996 increased in area and in density from 1996 to 2014. The number of channels locations were dependent on vegetation density and presence while vegetation growth occurred predominately in areas previously occupied by the channel.en_US
dc.identifier.urihttps://hdl.handle.net/1794/22293
dc.language.isoen_US
dc.publisherUniversity of Oregon
dc.rightsAll Rights Reserved.
dc.subjectAerial photographyen_US
dc.subjectBiogeomorphologyen_US
dc.subjectFluvialen_US
dc.subjectGeomorphic changeen_US
dc.subjectMount St. Helensen_US
dc.subjectToutle Riveren_US
dc.titleFluvial Biogeomorphic Evolution of the Upper South Fork Toutle River, WA After the 1980 Eruption of Mount St. Helens
dc.typeElectronic Thesis or Dissertation
thesis.degree.disciplineDepartment of Geography
thesis.degree.grantorUniversity of Oregon
thesis.degree.levelmasters
thesis.degree.nameM.S.

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