Hydroacoustic Evaluation of Downstream Fish Passage at John Day Dam in 2002 PDF Download
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Author: Russell A. Moursund
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 150
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Book Description
Author: Russell A. Moursund
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 150
Get Book Here
Book Description
Author: Russell A. Moursund
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 58
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Book Description
Author:
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Category :
Languages : en
Pages :
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This report describes short-term studies conducted in late November and early December 2001 to optimize hydroacoustic sampling techniques for John Day Dam before the 2002 fish passage efficiency (FPE) study. Knowledge gained in this study should significantly improve hydroacoustic sampling and the accuracy of estimates of fish passage at two locations that have presented problems in past studies. The spillway has been most problematic because many fish detected there were not entrained. Without correction, non-commitment of fish can result in multiple detections and overestimation of fish passage and FPE. Trash-rack-mounted, down-looking transducers for sampling unguided fish at a submerged traveling screen (STS) also have posed problems because the beam was aimed so far downstream that researchers had concerns about fish aspect and detectability. The deployments, aiming angles, and ping rates described here should eliminate all problems encountered in previous studies. This report describes hydroacoustic evaluations. The spill-bay deployment identified in this study should completely eliminate multiple detections of fish by limiting the sample volume for counting fish to the deep high-discharge volume adjacent to the gate. Results from testing of transducers deployed in a turbine intake with an STS suggest that, after testing in 2002, it may be possible to cut the number of powerhouse transducers sampling STS units by 50% or to double the spatial sampling coverage with the same number of transducers, all while improving detectability.
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Languages : en
Pages :
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The Portland District of the U.S. Army Corps of Engineers requested that the Pacific Northwest National Laboratory (PNNL) and the U.S. Army Engineer Research and Development Center (ERDC) conduct fish-passage studies at Bonneville Dam in 2002. The ERDC contracted with MEVATEC Corporation to provide staff ranging from scientists to technicians to help conduct the study. This study supports the Portland-District goal of maximizing fish-passage efficiency (FPE) and obtaining 95% survival for juvenile salmon passing Bonneville Dam. In this report, we present results of two studies of juvenile salmonid passage at Bonneville Dam that we carried out in the 2002 downstream passage season April 20 through July 15, 2002. The first study of Project-wide FPE provides hourly estimates of fish passage and associated variances for all operating turbine units, spill bays, and the two sluiceway entrances at Powerhouse 1 (B1), as well as estimates of a variety of fish-passage efficiency and effectiveness measures. This was the third consecutive year of full-project hydroacoustic sampling and passage estimation. The second study was more narrowly focused on B2 turbines and had two components: (1) to sample the FGE at two modified turbine intakes and compare them with efficiencies of other B2 units that were sampled in the first study, and (2) to evaluate proportions of fish passing up into gatewell slots versus through screen gaps at a few B2 turbine intakes.
Author: Samuel V. Johnston
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages :
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Author: Russell A. Moursund
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 17
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Author:
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ISBN:
Category : Fisheries
Languages : en
Pages : 816
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Author: Gene R. Ploskey
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ISBN:
Category : Fish habitat improvement
Languages : en
Pages :
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Author: Brian D. McFadden
Publisher:
ISBN:
Category : Fishways
Languages : en
Pages : 107
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Author: Llew Johnson
Publisher:
ISBN:
Category : Fishways
Languages : en
Pages : 93
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