Download or read book Managing the Columbia River written by National Research Council and published by National Academies Press. This book was released on 2004-07-27 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flows of the Columbia River, although modified substantially during the twentieth century, still vary considerably between seasons and between years. Lowest flows tend to occur during summer months when demand for irrigation water is at its highest and when water temperatures are greatest. These periods of low flows, high demand, and high temperature are critical periods for juvenile salmon migrating downstream through the Columbia River hydropower system. Although impacts on salmon of any individual water withdrawal may be small, the cumulative effects of numerous withdrawals will affect Columbia River flows and would pose increased risks to salmon survival. The body of scientific knowledge explaining salmon migratory behavior and physiology is substantial, but imperfect, and decision makers should acknowledge this and be willing to take action in the face of uncertainties. In order to provide a more comprehensive water permitting process, the State of Washington, Canada, other basin states, and tribal groups should establish a basin-wide forum to consider future water withdrawal application permits. If the State of Washington issues additional permits for water withdrawals from the Columbia River, those permits should contain provisions that allow withdrawals to be curtailed during critical high-demand periods.
Download or read book Instream Flows for Salmon written by D. W. Reiser and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Methods for Recommending Instream Flows to Support Spawning by Salmon written by Christopher C. Estes and published by . This book was released on 1985 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Instream Flow Requirements of the Lower North Fork South Fork and Mainstream Skokomish River written by Phillip L. Wampler and published by . This book was released on 1980 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Habitat Suitability Index Models and Instream Flow Suitability Curves written by Robert F. Raleigh and published by . This book was released on 1986 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Salmon and Water written by Matthew Thomas Summers and published by . This book was released on 2008 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spatial Dynamic Groundwater Regulation to Ensure Adequate Instream Flows for Salmon written by Jae J. Han and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Competing demands for scarce water resources have led to conflict in semi-arid and arid regions. Such conflicts often involve the need to restrict the use of groundwater pumping in irrigated agriculture in order to leave adequate quantities of water for fish species in nearby streams. Groundwater pumping can lead to a reduction in instream flows of nearby streams in a process known as stream depletion. From an economic standpoint, policies intended to leave adequate quantities of water instream for any purpose should aim to minimize the welfare losses accrued by irrigated agriculture due to reduced pumping. To this effect, prior studies have utilized spatial characterization of the hydrologic systems in question to spatially target water allocation between groundwater irrigators and instream demands (Young et al. 1986, Keplinger et al. 1998, McCarl et al. 1999, Kuwayama and Brozovic 2011). However, the policies developed or analyzed in these studies usually focus on meeting aggregate instream flow goals on a seasonal or yearly basis rather than meeting them on a continuous basis. In this thesis, I present a dynamic optimization framework that solves for optimal groundwater pumping allocations in a stream-aquifer system with instream flow goals that need to be met on a daily basis. An analytical hydrology model is integrated into the framework to constrain stream depletion impacts on a daily basis to ensure that minimum instream flow requirements for ecological needs are met on a daily basis. I apply this framework to the Scott River Basin in northern California, which is a region where extensive irrigation by farmers has harmed the local coho salmon species by reducing the natural flows of stream habitats. The coho salmon have been listed as Threatened under the state and federal Endangered Species Acts, and therefore must be protected. The results indicate that wells located farther from the stream should generally be allocated more water in most hydrologic scenarios. A counterintuitive exception to this general finding is that wells located closer to the stream should be allocated more water when there is a period of extreme scarcity in the instream water supply during the year. This result is driven by the fact that there is a time lag associated with the stream depletion externality following pumping, and this time lag varies with location relative to the stream. Thus, any period of time during the year with extreme water scarcity requires a cessation of pumping in advance of that period so that stream depletion impacts can adequately dissipate before the start of the period. Wells that are farther away from the stream cause higher stream depletion impacts following the cessation of pumping, so they would need to cease pumping earlier in advance of the period of extreme water scarcity. Finally, my analysis suggests that in the Scott River Basin, targeted daily groundwater pumping limits tailored to individual irrigators may lead to welfare costs that are over 30% less than that of the corresponding uniform reduction policy in which all irrigators are restricted equally. The relative welfare gains of the targeted policy over the uniform reduction policy increase as the scarcity of the instream water supply increases.
Download or read book Instream Flow Strategies for Oregon written by Wayne Nelson and published by . This book was released on 1978 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book State Salmon Strategy Report written by Washington (State). Department of Ecology and published by . This book was released on 1998 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Relationship Between Instream Flow Adult Immigration and Spawning Habitat Availability for Fall run Chinook Salmon in the Upper San Joaquin River California Final Report written by and published by . This book was released on 1994 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Instream Flow Investigations written by William D. Horton and published by . This book was released on 1985 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Instream Flow Incremental Methodology written by Clair B. Stalnaker and published by . This book was released on 1995 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Instream Flow Requirements of Anadromous Salmonids Brush Creek Mendocino County California written by William M. Snider and published by . This book was released on 1985 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessment of effect of altered stream flow characteristics on fish and wildlife written by and published by . This book was released on 1977 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Instream Flow Requirements for Fall Chinook Salmon oncorhynchus Tshawytscha in the American River California written by Alice A. Rich and published by . This book was released on 1985 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Instream Flow Requirements of the Fish and Wildlife Resources of the Lower American River Sacramento County California written by William M. Snider and published by . This book was released on 1986 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the Symposium and Specialty Conference on Instream Flow Needs written by and published by . This book was released on 1976 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt:
