Gwynn R. Johnson
Date of Award
Bachelor of Science (B.S.) in Civil & Environmental Engineering and University Honors
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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Kim, Chulgi, "Emerging Pollutants in the Columbia River: a Simple Assessment of Nonpoint Source Zones" (2017). Civil and Environmental Engineering Undergraduate Honors Theses. 6.