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Dworshak Dam Impact Impacts Assessment And Fishery Investigation
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Book Synopsis Dworshak Dam Impact (Impacts) Assessment and Fishery Investigation by :
Download or read book Dworshak Dam Impact (Impacts) Assessment and Fishery Investigation written by and published by . This book was released on 1989 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Kokanee abundance, estimated from July trawl data, was 1.2 million fish in 1988, including 553,000 fry, 501,000 yearlings and 156,000 subadults. Spawning trend data indicated escapement was up threefold compared to 1987, despite a sport harvest of 207,000 kokanee averaging 258 mm caught at a rate of 1.5 fish per hour. An estimated 40,000 kokanee were counted during the September peak of spawning in five tributaries of the reservoir. Size of adult fish was below average at 293 mm. Zooplankton densities averaged 10.3 organisms/L in 1988 and ranged from 0.3 organisms/L during April at the Little North Fork station to 26.2 organisms/L in November at the Elk Creek station. Densities were similar to values obtained prior to the development of the primary kokanee fishery; however, cladocerans made up only 34.9% of the zooplankton sampled. Daphnia and Cyclops were the most important food items; Daphnia became the prime food organism as its seasonal abundance increased. Concentrations of ortho-phosphate and nitrate, lower than in the 1970s, indicated Dworshak may have become more oligotrophic. 13 refs., 24 figs., 4 tabs.
Book Synopsis Dworshak Dam Impact Assessment and Fishery Investigation by : Gregg Mauser
Download or read book Dworshak Dam Impact Assessment and Fishery Investigation written by Gregg Mauser and published by . This book was released on 1989 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dworshak Dam Impacts Assessment & Fishery Investigations by : Melo Maiolie
Download or read book Dworshak Dam Impacts Assessment & Fishery Investigations written by Melo Maiolie and published by . This book was released on 1993 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dworshak Dam Impacts Assessment and Fisheries Investigation by : Eric J. Stark
Download or read book Dworshak Dam Impacts Assessment and Fisheries Investigation written by Eric J. Stark and published by . This book was released on 2006 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes research to test underwater strobe lights to determine their effectiveness at repelling kokanee away from the turbine intakes of Dworshak Dam.
Book Synopsis Dworshak Dam Impacts Assessment and Fisheries Investigation by :
Download or read book Dworshak Dam Impacts Assessment and Fisheries Investigation written by and published by . This book was released on 1996 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors measured the day and night depth distribution of kokanee Oncorhynchus nerka kennerlyi directly upstream of Dworshak Dam from October 1993 to December 1994 using split-beam hydroacoustics. At night most kokanee (70%) were distributed in a diffuse layer about 10 m thick. The depth of the layer varied with the season and ranged from 30 to 40 m deep during winter and from 15 to 25 m deep during summer. Nighttime depth of the kokanee layer during summer roughly corresponded to a zone where water temperatures ranged from 7 C to 12 C. Daytime kokanee distribution was much different with kokanee located in dense schools. Most kokanee (70%) were found in a 5--15 m thick layer during summer. Daytime depth distribution was also shallowest during fall and deepest during winter. Dworshak Dam has structures which can be used for selective water withdrawal and can function in depth ranges that will avoid the kokanee layer. Temperature constraints limit the use of selective withdrawal during the spring, summer, and fall, but in the winter, water is nearly isothermal and the full range of selector gate depths may be utilized. From October 1993 to February 1994, selector gates were positioned to withdraw water from above the kokanee layer. The discharge pattern also changed with more water being released during May and July, and less water being released during fall and winter. A combination of these two changes is thought to have increased kokanee densities to a record high of 69 adults/ha.
Author :United States. Congress. Senate. Committee on Appropriations. Subcommittee on Energy and Water Development Publisher : ISBN 13 : Total Pages :568 pages Book Rating :4.:/5 (51 download)
Book Synopsis Columbia River Basin Salmon Recovery Efforts by : United States. Congress. Senate. Committee on Appropriations. Subcommittee on Energy and Water Development
Download or read book Columbia River Basin Salmon Recovery Efforts written by United States. Congress. Senate. Committee on Appropriations. Subcommittee on Energy and Water Development and published by . This book was released on 1993 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Columbia River System Operation Review (SOR) by :
Download or read book Columbia River System Operation Review (SOR) written by and published by . This book was released on 1996 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Columbia and Snake Rivers, 1992 Salmon Flow Measures (ID,OR,WA), Options Analysis Document by :
Download or read book Columbia and Snake Rivers, 1992 Salmon Flow Measures (ID,OR,WA), Options Analysis Document written by and published by . This book was released on 1992 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1989 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Lower Snake River Juvenile Salmon Migration Feasibility Report by :
Download or read book Lower Snake River Juvenile Salmon Migration Feasibility Report written by and published by . This book was released on 2002 with total page 900 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1995 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fish and Wildlife Implementation Plan by :
Download or read book Fish and Wildlife Implementation Plan written by and published by . This book was released on 2003 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Compilation Report on the Effects of Reservoir Releases on Downstream Ecosystems by : Edward Cheslak
Download or read book Compilation Report on the Effects of Reservoir Releases on Downstream Ecosystems written by Edward Cheslak and published by . This book was released on 1990 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Lower Snake River Biological Drawdown Test by :
Download or read book Lower Snake River Biological Drawdown Test written by and published by . This book was released on 1994 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Operation of Flaming Gorge Dam written by and published by . This book was released on 2005 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Secretary of the Interior, acting through the Bureau of Reclamation, proposes to take action to assist in the recovery of four endangered fish in the Green River downstream from Flaming Gorge Dam, a Colorado River Storage Project facility in northeastern Utah, with a reservoir located in Utah and Wyoming. The purpose of the proposed action is to operate Flaming Gorge Dam to protect and assist in recovery of the populations and designated critical habitat of four endangered fishes, while maintaining all authorized purposes of the Flaming Gorge Unite of the Colorado River Storage Project, particularly those related to the development of water resources in accordance with the Colorado River Compact. This draft environmental impact statement has been prepared pursuant to the National Environmental Policy Act to analyze the effects of operating Flaming Gorge Dam in accordance with a set of flow and temperature recommendations developed by the Upper Colorado River Endangered Fish Recovery Program"--Page i
Download or read book Aquaculture Research written by and published by . This book was released on 1983 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Advisory Committee on Technology and Society Publisher :National Academies Press ISBN 13 :9780309037860 Total Pages :1298 pages Book Rating :4.0/5 (378 download)
Book Synopsis Cities and Their Vital Systems by : Advisory Committee on Technology and Society
Download or read book Cities and Their Vital Systems written by Advisory Committee on Technology and Society and published by National Academies Press. This book was released on 1989 with total page 1298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cities and Their Vital Systems asks basic questions about the longevity, utility, and nature of urban infrastructures; analyzes how they grow, interact, and change; and asks how, when, and at what cost they should be replaced. Among the topics discussed are problems arising from increasing air travel and airport congestion; the adequacy of water supplies and waste treatment; the impact of new technologies on construction; urban real estate values; and the field of "telematics," the combination of computers and telecommunications that makes money machines and national newspapers possible.
