Session B8: Three Dimensional Swimming-Fatigue Model to Predict Passage of Asian Carp at a Lock and Dam
Location
Groningen, The Netherlands
Event Website
http://fishpassage.umass.edu/
Start Date
24-6-2015 2:45 PM
End Date
24-6-2015 3:00 PM
Description
Abstract:
There is an acute need to better understand and predict fish swimming activity around lock and dam structures so that their flows can be set to block undesirable invasive species while permitting desirable native species to pass. For example, while the lock and dam system in the Upper Mississippi River presently appears to serve as the primary check to the upstream movement of invasive Asian carps (Hypophthalmichthys spp.), we do not yet understand how effective it is or how it might be improved. Our project seeks to identify changes in gate operation that might inhibit passage of Asian carp while having minimal impacts on native fish passage. To accomplish this, we developed a swimming-fatigue and optimal path selection model to predict the likelihood of upstream passage of fish through three-dimensional turbulent flows. This model extends conventional swimming-fatigue time models to accommodate three-dimensional movements and selects swimming trajectories following paths of least energetic cost. Turbulent fluctuations, which are neglected in conventional one-dimensional passage models, are incorporated by changing local velocities according to the level of fluctuations calculated from accompanying computational fluid dynamics models. Likelihood of passage is then estimated using Monte Carlo simulations which randomly selects model fish with unique swimming capabilities. In this talk we will discuss preliminary model results and how these findings can be used to manipulate gate operation and flow for management purposes. (Funded by the Minnesota Environmental and Natural Resources Trust Fund).
Session B8: Three Dimensional Swimming-Fatigue Model to Predict Passage of Asian Carp at a Lock and Dam
Groningen, The Netherlands
Abstract:
There is an acute need to better understand and predict fish swimming activity around lock and dam structures so that their flows can be set to block undesirable invasive species while permitting desirable native species to pass. For example, while the lock and dam system in the Upper Mississippi River presently appears to serve as the primary check to the upstream movement of invasive Asian carps (Hypophthalmichthys spp.), we do not yet understand how effective it is or how it might be improved. Our project seeks to identify changes in gate operation that might inhibit passage of Asian carp while having minimal impacts on native fish passage. To accomplish this, we developed a swimming-fatigue and optimal path selection model to predict the likelihood of upstream passage of fish through three-dimensional turbulent flows. This model extends conventional swimming-fatigue time models to accommodate three-dimensional movements and selects swimming trajectories following paths of least energetic cost. Turbulent fluctuations, which are neglected in conventional one-dimensional passage models, are incorporated by changing local velocities according to the level of fluctuations calculated from accompanying computational fluid dynamics models. Likelihood of passage is then estimated using Monte Carlo simulations which randomly selects model fish with unique swimming capabilities. In this talk we will discuss preliminary model results and how these findings can be used to manipulate gate operation and flow for management purposes. (Funded by the Minnesota Environmental and Natural Resources Trust Fund).
https://scholarworks.umass.edu/fishpassage_conference/2015/June24/54
Comments
Presenting Author Bio: Dr. Zielinski is a Postdoctoral Research Associate at the University of Minnesota Aquatic Invasive Species Research Center. He is a civil engineer specializing in ecohydraulics, fluid mechanics/dynamics, and computational modeling. Much of his work has focused on developing acoustic deterrents and velocity barriers for invasive carp.