scholarly journals Evaluation of Juvenile Fish Bypass and Adult Fish Passage Facilities at Water Diversions on the Umatilla River; 1994 Annual Report.

10.2172/90254 ◽  
1995 ◽  
Author(s):  
Suzanne M Knapp
Keyword(s):  
Annual Report ◽  
Juvenile Fish ◽  
Fish Passage ◽  
Adult Fish ◽  
Water Diversions

scholarly journals Feasibility of Documenting and Estimating Adult Fish Passage at Large Hydroelectric Facilities in the Snake River Using Video Technology; 1992 Annual Report.

1993 ◽  
Author(s):  
Douglas R. Hatch ◽  
David R. Pederson ◽  
Mathew Schartzberg
Keyword(s):  
Annual Report ◽  
Fish Passage ◽  
Snake River ◽  
Adult Fish ◽  
Video Technology

scholarly journals Application of an Eulerian–Lagrangian–Agent method (ELAM) to rank alternative designs of a juvenile fish passage facility

2006 ◽  
Vol 8 (4) ◽  
pp. 271-295 ◽  
Author(s):  
L. J. Weber ◽  
R. A. Goodwin ◽  
S. Li ◽  
J. M. Nestler ◽  
J. J. Anderson
Keyword(s):  
Juvenile Fish ◽  
Value Added ◽  
The United States ◽  
Fish Passage ◽  
Three Dimensions ◽  
Cfd Modeling ◽  
Engineering Practice ◽  
Complex Flow ◽  
Ecological Processes ◽  
Agent Based

The Eulerian–Lagrangian–Agent method (ELAM) couples three modelling approaches into a single, integrated simulation environment: (i) Eulerian descriptions, (ii) Lagrangian formulations, and (iii) agent reference frameworks. ELAMS are particularly effective at decoding and simulating the motion dynamics of individual aquatic organisms, using the output of high fidelity computational fluid dynamics (CFD) models to represent complex flow fields. Here we describe the application of an ELAM to design a juvenile fish passage facility at Wanapum Dam on the Columbia River in the United States. This application is composed of three parts: (1) an agent-based model, that simulates the movement decisions made by individual fish, (2) an Eulerian CFD model that solves the 3D Reynolds-averaged Navier–Stokes (RANS) equations with a standard k–ɛ turbulence model with wall functions using a multi-block structured mesh, and (3) a Lagrangian particle-tracker used to interpolate information from the Eulerian mesh to point locations needed by the agent model and to track the trajectory of each virtual fish in three dimensions. We discuss aspects of the computational mesh topology and other CFD modeling topics important to this and future applications of the ELAM model for juvenille salmon, the Numerical Fish Surrogate. The good match between forecasted (virtual) and measured (observed) fish passage proportions demonstrates the value-added benefit of using agent-based models (i.e. the Numerical Fish Surrogate model) as part of common engineering practice for fish passage design and, more fundamentally, to simulate complex ecological processes.

scholarly journals Utilising the boundary layer to help restore the connectivity of fish habitats and populations

2018 ◽  
Author(s):  
Jabin R. Watson ◽  
Harriet R. Goodrich ◽  
Rebecca L. Cramp ◽  
Matthew A. Gordos ◽  
Craig E. Franklin
Keyword(s):  
Habitat Fragmentation ◽  
Fish Species ◽  
Juvenile Fish ◽  
Fish Passage ◽  
Freshwater Ecosystems ◽  
Water Velocity ◽  
Fish Movement ◽  
Important Species ◽  
Significant Contributor ◽  
Remediation Design

SignificanceHabitat fragmentation is a significant contributor to the worldwide decline of freshwater ecosystem health, the most pervasive cause of which is culverts. Culverts act as a barrier to fish movement, impacting feeding, predator avoidance, spawning, and community structures. Here we show that a common remediation strategy that involves baffles, is detrimental to the successful passage of small bodied and juvenile fish at high velocities. To remedy this widespread problem, we present a novel remediation design that benefits a range of small-bodied species and juvenile fish at the same high velocities, regardless of morphology or ecological niche. The application of this remediation design may be expanded to any smooth surfaced anthropogenic structure, to improve fish passage and restore ecosystem functionality.AbstractCulverts are a major cause of habitat fragmentation in freshwater ecosystems, are a barrier to fish movement, and are regarded as a significant contributor in the decline of freshwater fish populations globally. To try to address this, various culvert remediation designs have been implemented, including the installation of vertical baffles and the provision of naturalistic (rock) substrates. While remediation strategies generally aim to reduce the velocity of water flowing through the structure, there is often resistance to their use because the resultant reduction in culvert discharge can negatively impact upstream flooding while also resulting in debris clogging and increased culvert maintenance costs. In addition, baffles markedly increase water turbulence that may be detrimental to passage by some fish species or size classes. Here we present some novel remediation designs that exploit the reduced water velocity in boundary layers along the culvert wall to enhance fish passage without significantly compromising discharge capacity. These longitudinal designs produce an expanded reduced velocity zone along the culvert margins that generate minimal turbulence. We show that these novel designs are significantly advantageous to the swimming endurance and traversability for six small-bodied Australian fish species. We also provide data on how and why some culvert baffle designs may impede small-bodied fish passage. This data scales with increasing water velocity, encompassing inter-specific differences in swimming capacity. These results have broad implications for fish community structure and the requirement of juvenile cohort of large-bodied commercially important species where baffles have been implemented to facilitate fish passage.

scholarly journals Fish Passage Center, annual report 1999

2000 ◽  
Author(s):  
Michele DeHart
Keyword(s):  
Annual Report ◽  
Fish Passage
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