Modeling Reach Scale Response to Regulated Flows on the Willamette River
| dc.contributor.advisor | Fonstad, Mark | |
| dc.contributor.author | Webster, Dion | |
| dc.date.accessioned | 2022-02-18T17:39:20Z | |
| dc.date.available | 2022-02-18T17:39:20Z | |
| dc.date.issued | 2022-02-18 | |
| dc.description.abstract | The upper Willamette river was historically a multi-threaded gravel-bed river. The multidecadal effects of a reduced flow regime, sediment flux, recruitment of large woody debris and bank stabilization caused by anthropogenic disturbances have resulted in decreased riverscape complexity. This project incorporates a 2D hydrodynamic landscape evolution model to simulate the extent of functional floodplain and the erosion/deposition patterns associated with the functional flow event for a segment of the upper Willamette River. The functional floodplain simulation indicated secondary features with tall banks and majority of the geomorphic change occurring in the main channel and adjacent bars rather than the floodplain features. Compared to a previous study on potential 2-year flood extent, the contemporary functional floodplain is drastically smaller. Modeling results show high precision values for inundation and a need for more erosion/deposition validation data. Results from this study also advocate for the inclusion of more landscape evolution model simulations for future restoration efforts. | en_US |
| dc.identifier.uri | https://hdl.handle.net/1794/27041 | |
| dc.language.iso | en_US | |
| dc.publisher | University of Oregon | |
| dc.rights | All Rights Reserved. | |
| dc.subject | Fluvial geomorphology | en_US |
| dc.subject | Geomorphology | en_US |
| dc.title | Modeling Reach Scale Response to Regulated Flows on the Willamette River | |
| dc.type | Electronic Thesis or Dissertation | |
| thesis.degree.discipline | Department of Geography | |
| thesis.degree.grantor | University of Oregon | |
| thesis.degree.level | masters | |
| thesis.degree.name | M.S. |
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