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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.

Recent studies of past climate and streamflow conditions have broadened understanding of long-term water availability in the Colorado River, revealing many periods when streamflow was lower than at any time in the past 100 years of recorded flows. That information, along with two important trends-a rapid increase in urban populations in the West and significant climate warming in the region-will require that water managers prepare for possible reductions in water supplies that cannot be fully averted through traditional means. Colorado River Basin Water Management assesses existing scientific information, including temperature and streamflow records, tree-ring based reconstructions, and climate model projections, and how it relates to Colorado River water supplies and demands, water management, and drought preparedness. The book concludes that successful adjustments to new conditions will entail strong and sustained cooperation among the seven Colorado River basin states and recommends conducting a comprehensive basinwide study of urban water practices that can be used to help improve planning for future droughts and water shortages.

Entering the Watershed is the product of a two-year project established by the Pacific Rivers Council to develop new federal riverine protection and restoration policy alternatives. It recommends a comprehensive new approach to river protection based on principles of watershed dynamics, ecosystem function, and conservation biology -- a nationwide, strategic community- and ecosystem-based watershed restoration initiative. The book: describes in detail the existing level of damage to rivers and species analyzes flaws and gaps in existing policy provides the framework necessary to develop new policies outlines the scientific underpinnings and management strategies needed in new policy makes specific policy proposals

Details the destruction of the Columbia River in the Pacific Northwest by well-intentioned Americans who saw only the benefits of the dam-building, power plant and irrigation projects, not realizing the longterm effects of killing the river.

This book presents the results of an interdisciplinary project that examined how law, policy and ecological dynamics influence the governance of regional scale water based social-ecological systems in the United States and Australia. The volume explores the obstacles and opportunities for governance that is capable of management, adaptation, and transformation in these regional social-ecological systems as they respond to accelerating environmental change. With the onset of the Anthropocene, global and regional changes in biophysical inputs to these systems will challenge their capacity to respond while maintaining functions of water supply, flood control, hydropower production, water quality, and biodiversity. Governance lies at the heart of the capacity of these systems to meet these challenges. Assessment of water basins in the United States and Australia indicates that state-centric governance of these complex and dynamic social-environmental systems is evolving to a more complex, diverse, and complex array public and private arrangements. In this process, three challenges emerge for water governance to become adaptive to environmental change. First, is the need for legal reform to remove barriers to adaptive governance by authorizing government agencies to prepare for windows of opportunity through adaptive planning, and to institutionalize the results of innovative solutions that arise once a window opens. Second, is the need for legal reform to give government agencies the authority to facilitate and participate in adaptive management and governance. This must be accompanied by parallel legal reform to assure that engagement of private and economic actors and the increase in governmental flexibility does not destabilize basin economies or come at the expense of legitimacy, accountability, equity, and justice. Third, development of means to continually assess thresholds and resilience of social-ecological systems and the adaptive capacity of their current governance to structure actions at multiple scales. The massive investment in water infrastructure on the river basins studied has improved the agricultural, urban and economic sectors, largely at the cost of other social and environmental values. Today the infrastructure is aging and in need of substantial investment for those benefits to continue and adapt to ongoing environmental changes. The renewal of institutions and heavily engineered water systems also presents the opportunity to modernize these systems to address inequity and align with the values and objectives of the 21st century. Creative approaches are needed to transform and modernize water governance that increases the capacity of these water-based social-ecological systems to innovate, adapt, and learn, will provide the tools needed to navigate an uncertain future.

"Ulrich's broad and incisive account ranges from descriptions of the dam's disastrous effects on a salmon-dependent culture to portraits of the plight of individual Indian families. Descendants of those to whom the promise was made and activists who have spent their lives working to acquire the sites reveal the remarkable patience and resiliance of the Columbia River Indians."--BOOK JACKET.

In 1986, President Ronald Reagan signed the Columbia River Gorge National Scenic Area Act, setting into motion one of the great land-use experiments of modern times. The act struck a compromise between protection for one of the West's most stunning landscapes--the majestic Gorge carved by Ice Age floods, which today divides Washington and Oregon--and encouragement of compatible economic development in communities on both sides of the river. In Bridging a Great Divide, award-winning environmental journalist Kathie Durbin draws on interviews, correspondence, and extensive research to tell the story of the major shifts in the Gorge since the Act's passage. Sweeping change has altered the Gorge's landscape: upscale tourism and outdoor recreation, gentrification, the end of logging in national forests, the closing of aluminum plants, wind farms, and a population explosion in the metropolitan area to its west. Yet, to the casual observer, the Gorge looks much the same as it did twenty-five years ago. How can we measure the success of the Columbia River Gorge National Scenic Area Act? In this insightful and revealing history, Durbin suggests that the answer depends on who you are: a small business owner, an environmental watchdog group, a chamber of commerce. The story of the Columbia River Gorge National Scenic Area is the story of the Pacific Northwest in microcosm, as the region shifts from a natural-resource-based economy to one based on recreation, technology, and quality of life.