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Environmental biology of fishes
Extensive water use may alter stream flows so that areas used by spawning salmonids are dewatered, thus exposing intergravel development phases to suddenly changed physical and chemical conditions.…
Effects of Dewatering on Chinook Salmon Redds: Tolerance of Four Development Phases to One-Time Dewatering
Four intergravel development phases of chinook salmon Oncorhynchus tshawytscha were experimentally dewatered in artificial redds and Cleavage eggs and embryos and eleutheroembryos and pre-emergent alevins (the alevin phases) were each deWatered once for a continuous period.
Survival estimates for juvenile fish subjected to a laboratory-generated shear environment
There was no apparent size-related trend in susceptibility to high shear except that age-0 fall Chinook salmon were more resistant to shear environm...
Effects of Dewatering on Chinook Salmon Redds: Tolerance of Four Developmental Phases to Daily Dewaterings
Four intergravel developmental phases of chinook salmon Oncorhynchus tshawytscha were dewatered experimentally in artificial redds, finding that the egg phases were considerably more tolerant than the alevins.
Hanford Site National Environmental Policy Act (NEPA) Characterization
This document describes the U.S. Department of Energy's (DOE) Hanford Site environment. It is updated each year and is intended to provide a consistent description of the Hanford Site environment for…
A FISHERIES EVALUATION OF THE WESTSIDE DITCH AND TOWN CANAL FISH SCREENING FACILITIES SPRING 1990
The Pacific Northwest Laboratory (PNL) evaluated the effectiveness of new fish screening facilities in the Westside Ditch and Town Canal, near Ellensburg, in south-central Washington State. At the…
Efforts to Reduce Mortality to Hydroelectric Turbine-Passed Fish: Locating and Quantifying Damaging Shear Stresses
- G. Cada, J. Loar, L. Garrison, R. Fisher, D. Neitzel
- Environmental Science, EngineeringEnvironmental management
- 16 February 2006
A process is described by which laboratory bioassays, computational fluid dynamics models, and field studies can be integrated to evaluate the significance of fluid shear stresses that occur in a turbine to modify the design of hydroelectric turbines to improve fish passage survival.
Assessment of intergravel conditions influencing egg and alevin survival during salmonid redd dewatering
The primary conditions in the gravel that influence survival during dewatering are residual flow, moisture retention, temperature, gravel composition, dissolved oxygen, alevin behavior, and species characteristics.
Laboratory Studies on the Effects of Shear on Fish
The overall objective of our studies was to specify an index describing the hydraulic force that fish experience when subjected to a shear environment. Fluid shear is a phenomenon that is important…
Comparing Fish Screen Performance to Physical Design Criteria
Abstract Fish screens associated with irrigation diversion structures perform a vital function by protecting rearing and migrating fishes. Irrigation diversions in the western United States were…