First Advisor

Gwynn R. Johnson

Date of Award

Spring 2017

Document Type



Civil and Environmental Engineering




Nonpoint source pollution -- Columbia River Watershed, Water quality management -- Columbia River Watershed, Polybrominated diphenyl ethers




Water quality modeling in the Columbia River Basin was conducted at the confluence of the Willamette and Columbia Rivers, river mile 101. The study area for this research consists of Sauvie Island, OR, and the surrounding areas of Vancouver, WA. Analysis of the region’s watershed and simple hydrologic calculations allowed for estimates of potential sources contributing to PBDEs in the Columbia River along river mile 101. This research included assessment of rainfall patterns and peak discharge rates in the areas along the rivers. A simple model of overland flow for the watershed was applied to estimate the area’s contribution to overall flow in the Columbia River. Potential impacts and possible sources for emerging pollutants in the Columbia River at river mile 101 were inferred from this analysis.


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A thesis submitted in partial fulfillment of the requirement for the degree of Bachelor of Science with Departmental Honors in Civil and Environmental Engineering.

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