Download or read book Feasibility of Estimating Direct Mortality and Injury on Juvenile Salmonids Passing The Dalles Dam Spillway During High Discharge written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimated Direct Mortality and Injury Rates of Juvenile Salmonids in Passage Through the Dalles Dam Spillway Columbia River in Spring and Summer 2002 written by United States. Army. Corps of Engineers. Portland District and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimated Direct Mortality and Injury of Juvenile Salmonids in Passage Through The Dalles Dam Spillway Columbia River in Spring and Summer 2002 written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Direct Effects of Differential Spill Volumes on Mortality and Injury Rates of Juvenile Salmonids at The Dalles Dam Spillway Columbia River in Fall 2002 and Spring 2003 written by John Raymond Skalski and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydroacoustic Evaluation of Juvenile Salmonid Passage at The Dalles Dam Spillway 2006 written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study was to determine detailed vertical, horizontal, intensive, and diel distributions of juvenile salmonid passage at the spillway at The Dalles Dam from April 12 to July16, 2006. These data are being applied in the Spillway Improvements Program to position release pipes for direct injury and mortality studies and to provide baseline data for assessment of the vortex suppression devices scheduled for deployment in 2007. We estimated fish distributions from hydroacoustic data collected with split-beam transducers arrayed across Bays 1 through 9 and 14. Spill at ~20 kcfs per bay was bulked at Bays 1-6, although the other bays were opened at times during the study to maintain a 40% spill percentage out of total project discharge. The vertical distribution of fish was skewed toward the surface during spring, but during summer, passage peaked at 2-3 m above the spillway ogee. Fish passage rates (number per hour) and fish densities (number per kcfs) were highest at Bay 6, followed by passage at Bay 5. This result comports with spillway horizontal distribution data from radio telemetry and hydroacoustic studies in 2004. The vertical and horizontal distribution of fish passage at bays 5 and 6 was much more variable during spring than summer and more variable at bay 5 than bay 6. Diel distribution data revealed that fish passage was highest during 0600-0700 h in spring; otherwise passage was reasonably uniform on a diel basis. This study substantiates the purpose of the spillway vortex suppression device to re-distribute downstream migrants away from Bay 6 toward Bays 1-5.
Download or read book Estimates of the Proportions of Radio tagged Juvenile Salmonids Passing Via the Spillway Sluiceway and Turbines During Tests of Sluiceway Guidance Improvement Devices at The Dalles Dam in 2001 written by John W. Beeman and published by . This book was released on 2005 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Juvenile Salmonid Survival condition Upon Passing The Dalles Dam Spillbays 4 and 6 and a Vortex at Higher Spill Levels written by Normandeau Associates and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Relative Survival of Juvenile Salmon Passing Through the Spillway of the Dalles Dam 1997 written by Earl M. Dawley and published by . This book was released on 2000 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Juvenile Salmonid Direct Survival injury in Passage Through the Ice Harbor Dam Spillway Snake River written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Relative Survival of Juvenile Salmon Passing Through the Spillway of The Dalles Dam 1997 2000 written by Earl M. Dawley and published by . This book was released on 2002 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Relative Survival of Juvenile Salmon Passing Through the Spillway of The Dalles Dam 1999 written by Earl M. Dawley and published by . This book was released on 2000 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Survival Rates of Juvenile Salmonids Passing Through the Bonneville Dam and Spillway in 2008 written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes a 2008 acoustic telemetry survival study conducted by the Pacific Northwest National Laboratory for the Portland District of the U.S. Army Corps of Engineers. The study estimated the survival of juvenile Chinook salmon and steelhead passing Bonneville Dam (BON) and its spillway. Of particular interest was the relative survival of smolts detected passing through end spill bays 1-3 and 16-18, which had deep flow deflectors immediately downstream of spill gates, versus survival of smolts passing middle spill bays 4-15, which had shallow flow deflectors.
Download or read book Relative Survival of Juvenile Salmon Passing Through the Spillway and the Ice and Trash Sluiceway of The Dalles Dam 1998 written by Earl M. Dawley and published by . This book was released on 2000 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimates of Survival and Condition of Juvenile Salmonids Passing Through the Downstream Migrant Fish Protection Facilities at Red Bluff Diversion Dam on the Sacramento River Spring and Summer 1994 written by John P. Bigelow and published by . This book was released on 1997 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Abundance and Seasonal Spatial and Diel Distribution Patterns of Juvenile Salmonids Passing the Red Bluff Diversion Dam Sacramento River written by Phillip D. Gaines and published by . This book was released on 2002 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Survival Estimates for the Passage of Spring Migrating Juvenile Salmonids Through Snake and Columbia River Dams and Reservoirs 2003 2004 Annual Report written by and published by . This book was released on 2004 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: For juvenile chinook salmon Oncorhynchus tshawytscha, sockeye salmon O. nerka, and steelhead O. mykiss that migrate through reservoirs, hydroelectric projects, and free-flowing sections of the Snake and Columbia Rivers, survival estimates are essential to develop effective strategies for recovering depressed stocks. Many management strategies were based on estimates of system survival (Raymond 1979; Sims and Ossiander 1981) derived in a river system considerably different from today's (Williams and Matthews 1995; Williams et al. 2001). Knowledge of the magnitude, locations, and causes of smolt mortality under present passage conditions, and under conditions projected for the future, are necessary to develop strategies that will optimize smolt survival during migration. From 1993 through 2002, the National Marine Fisheries Service (NMFS) and the University of Washington (UW) demonstrated the feasibility of using three statistical models to estimate survival of PIT-tagged (Prentice et al. 1990a) juvenile salmonids passing through Snake River dams and reservoirs (Iwamoto et al. 1994; Muir et al. 1995, 1996, 2001a, 2003; Smith et al. 1998, 2000a, b; Hockersmith et al. 1999; Zabel et al. 2001, 2002). Evaluation of assumptions for these models indicated that all were generally satisfied, and accurate and precise survival estimates were obtained. In 2003, NMFS and UW completed the eleventh year of the study. Flow levels during the early portion of the 2003 spring migration were similar to 2002, and only slightly higher than in the drought conditions during 2001. However, flow levels were much greater during the later part of the migration in 2003. Spill levels were similar to 2002, much higher than in 2001. Research objectives were to: (1) estimate reach survival and travel time in the Snake and Columbia Rivers throughout the yearling chinook salmon and steelhead migrations; (2) evaluate relationships between survival estimates and migration conditions; and (3) evaluate the performance of the survival-estimation models under prevailing operational and environmental conditions. Additionally, as adult return information becomes available, as part of this study we will evaluate relationships between juvenile survival and subsequent adult returns for fish with different juvenile migration histories.
Download or read book Survival Estimates of Migrant Juvenile Salmonids Through the Dalles Dam Ice and Trash Sluiceway Using Radio telemetry 2001 written by Timothy D. Counihan and published by . This book was released on 2005 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
