Publication

Session B8: An Integrative Strategy for Understanding Fish Behavior at Hydropower Forebays

Abstract
Abstract: In the last decade, CFD with agent-based models has emerged as a useful methodology to design and evaluate fishway efficiency. However, despite using sophisticated modeling approaches, actual fishway performance varies widely. For certain species, expensive operational or structural changes of the bypasses are needed after biological information became available. Understanding the behavior of targeted fish species is therefore essential in locating and designing fishway entrances. This study presents a methodology that integrates biology and engineering to link fish behavior to hydrodynamics using an inverse problem approach. Chinook and steelhead swim paths were measured in the forebay of Rocky Reach and Priest Rapids dams. 3D CFD simulations of hydropower forebays were performed to model and fully understand the hydraulics of the system. Fish thrust magnitude and orientation, calculated by combining measured and modeled data at every measured fish location, were used to characterize fish swimming behavior at the forebay. Probabilistic distributions for fish thrust magnitude and direction were generated to capture the inherent stochasticity of animal behavior and will be presented and discussed.
Type
event
event
Date
2015-06-24
Publisher
Degree
Advisors
Rights
License
Research Projects
Organizational Units
Journal Issue
Embargo
DOI
Publisher Version
Embedded videos