All Work and All Play
I was drawn to the Water Resources Graduate Program because I’m passionate about rivers. After spending all week in Corvallis studying the hydraulics in my experimental channel, I’d paddle natural rivers for fun. The geology and wet, mild climate of the Northwest makes it an ideal place to whitewater kayak for most of the year. As a result, I’d take most of my study breaks on my favorite rivers in the Columbia River Gorge and the Willamette Valley.
A River of Research
A floating guidance structure, or a guide wall, is a long, partially-submerged structure that is intended to alter the hydraulics of a reservoir such that ocean-going juvenile salmon find safe passage options over or through a dam. I studied the hydraulic and behavioral impact of a floating guidance structure in an experimental channel at the Oregon Hatchery Research Center, using nearly 200 spring chinook salmon and a large pump to create a re-circulating flume.
Although I found some evidence that velocity gradients may cue fish to change their behavior (mainly by halting in the channel, rather than continuing downstream past the guide wall), I think the most interesting conclusion of my research is that understanding fish behavior is likely more complicated than finding a simple hydraulic threshold at which fish slow down, speed up, or change their swimming angle. Instead, future research ought to examine a fish’s entire hydraulic experience during its encounter with a guidance structure to fully understand the impact of hydraulics on fish behavior. If successful, this research could aid in the migration of endangered and threatened species vital to the Pacific Northwest’s economy, environmental sustainability, and culture.