The Controlled Flood in Grand Canyon PDF Download
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Author: Robert H. Webb
Publisher: American Geophysical Union
ISBN:
Category : Science
Languages : en
Pages : 392
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Book Description
Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 110. The natural flow of almost every river in the United States has been modified to meet various socioeconomic goals—navigation, irrigation, power generation and flood control. The success of the dams and reservoirs built to achieve these goals has been accompanied by changes in the status of riverine resources downstream, a cause of growing environmental and ecological concern. For example, before Glen Canyon Dam was completed, the Colorado River transported large quantities of sediment in floods as large as 8500 m3/s. After the dam was closed in 1963, dam releases typically were less than the powerplant capacity of 890 m3/s and exhibited large daily flow fluctuations. The river carried little sediment. The daily fluctuations in flow eroded sand bars, and the smaller, controlled flow did not redeposit them. The clear, cold water resulted in increased aquatic productivity such that rainbow trout and other nonnative fishes thrived while most native species were lost or endangered.
Author: Robert H. Webb
Publisher: American Geophysical Union
ISBN:
Category : Science
Languages : en
Pages : 392
Get Book Here
Book Description
Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 110. The natural flow of almost every river in the United States has been modified to meet various socioeconomic goals—navigation, irrigation, power generation and flood control. The success of the dams and reservoirs built to achieve these goals has been accompanied by changes in the status of riverine resources downstream, a cause of growing environmental and ecological concern. For example, before Glen Canyon Dam was completed, the Colorado River transported large quantities of sediment in floods as large as 8500 m3/s. After the dam was closed in 1963, dam releases typically were less than the powerplant capacity of 890 m3/s and exhibited large daily flow fluctuations. The river carried little sediment. The daily fluctuations in flow eroded sand bars, and the smaller, controlled flow did not redeposit them. The clear, cold water resulted in increased aquatic productivity such that rainbow trout and other nonnative fishes thrived while most native species were lost or endangered.
Author: Robert W. Adler
Publisher: Island Press
ISBN: 1597267783
Category : Science
Languages : en
Pages : 341
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Book Description
Over the past century, humans have molded the Colorado River to serve their own needs, resulting in significant impacts to the river and its ecosystems. Today, many scientists, public officials, and citizens hope to restore some of the lost resources in portions of the river and its surrounding lands. Environmental restoration on the scale of the Colorado River basin is immensely challenging; in addition to an almost overwhelming array of technical difficulties, it is fraught with perplexing questions about the appropriate goals of restoration and the extent to which environmental restoration must be balanced against environmental changes designed to promote and sustain human economic development. Restoring Colorado River Ecosystems explores the many questions and challenges surrounding the issue of large-scale restoration of the Colorado River basin, and of large-scale restoration in general. Robert W. Adler evaluates the relationships among the laws, policies, and institutions governing use and management of the Colorado River for human benefit and those designed to protect and restore the river and its environment. He examines and critiques the often challenging interactions among law, science, economics, and politics within which restoration efforts must operate. Ultimately, he suggests that a broad concept of “restoration” is needed to navigate those uncertain waters, and to strike an appropriate balance between human and environmental needs. While the book is primarily about restoration of Colorado River ecosystems, it is also about uncertainty, conflict, competing values, and the nature, pace, and implications of environmental change. It is about our place in the natural environment, and whether there are limits to that presence we ought to respect. And it is about our responsibility to the ecosystems we live in and use.
Author: James Kaiser
Publisher: James Kaiser
ISBN: 1940754607
Category : Travel
Languages : en
Pages : 403
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Book Description
Discover the best of Grand Canyon National Park in this award-winning, full-color travel guidebook. Over 300 five-star reviews for previous editions. From hiking to biking to river rafting, Grand Canyon National Park is filled with adventures. But without careful planning, a trip there can be overwhelming. Grand Canyon: The Complete Guide helps you make the most of your time in the park. Whatever your interests—hiking the Bright Angel Trail, riding mules to Phantom Ranch, watching sunset from Hopi Point, relaxing at a historic lodge—this gorgeous travel guidebook puts the best of Grand Canyon at your fingertips. Beautiful color photos showcase the park's best viewpoints and destinations. Fascinating chapters on Geology, History and Wildlife reveal the story behind the scenery. Detailed maps make travel planning easy. From Havasu Canyon's stunning waterfalls to incredible day hikes on the North and South Rims, Grand Canyon: The Complete Guide is the only guidebook you'll need. Filled with tips to save you time and money! Winner: Benjamin Franklin Award (Best Full-Color Travel Guide) Winner: Independent Publisher Book Award (Best Travel Guide)
Author: Steven Gloss
Publisher:
ISBN:
Category : Stream ecology
Languages : en
Pages : 234
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Book Description
Author: James Kaiser
Publisher: James Kaiser
ISBN: 194075433X
Category : Travel
Languages : en
Pages : 369
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Book Description
Discover the best of Grand Canyon in this award-winning, full-color travel guidebook. From hiking to biking to river rafting, Grand Canyon National Park is filled with adventures. But without careful planning, a trip there can be overwhelming. Grand Canyon: The Complete Guide helps you make the most of your time in the park. Whatever your interests—hiking the Bright Angel Trail, riding mules to Phantom Ranch, watching sunset from Hopi Point, relaxing at a historic lodge—this gorgeous travel guidebook puts the best of Grand Canyon at your fingertips. Beautiful color photos showcase the park's best viewpoints and destinations. Fascinating chapters on Geology, History and Wildlife reveal the story behind the scenery. Detailed maps make travel planning easy. From Havasu Canyon's stunning waterfalls to incredible day hikes on the North and South Rims, Grand Canyon: The Complete Guide is the only guidebook you'll need. Filled with tips to save you time and money! Winner: Benjamin Franklin Award (Best Full-Color Travel Guide) Winner: Independent Publisher Book Award (Best Travel Guide)
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 108
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Book Description
Author:
Publisher:
ISBN:
Category : Sedimentation and deposition
Languages : en
Pages : 720
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Book Description
Author: Princeton Review (COR)
Publisher: Princeton Review
ISBN: 0525568077
Category : Juvenile Nonfiction
Languages : en
Pages : 849
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Book Description
THE ALL-IN-ONE SOLUTION FOR YOUR HIGHEST POSSIBLE SCORE--including 8 full-length practice tests for realistic prep, content reviews for all test sections, techniques for scoring success, and access to premium online extras. Everything You Need to Know to Help Achieve a High Score. - Comprehensive subject review for every section of the exam - Valuable practice with complex reading comprehension passages and higher-level math problems - Hands-on experience with all question types (multi-step problems, passage-based grammar questions, and more) Practice Your Way to Perfection. - 8 full-length practice tests (4 in the book, 4 online) with detailed answer explanations - Drills for each test section--Reading, Writing and Language, and Math--plus writing exercises to help prepare for the Essay - In-depth online score reports for all practice tests to help analyze and track your progress Techniques That Actually Work. - Powerful tactics to help you avoid traps and beat the SAT - Pacing tips to help you maximize your time - Detailed examples of how to employ each strategy to your advantage Includes Access to Premium Online Exclusives: - Videos to teach you SAT test-taking strategies and commonly-tested topics - Access to college and university rankings, college admissions advice, and financial aid tips - Multi-week study guides - Special "SAT Insider" section packed with helpful info on picking your perfect school and writing essays that stand out
Author: The Princeton Review
Publisher: Princeton Review
ISBN: 0593450582
Category : Study Aids
Languages : en
Pages : 833
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Book Description
Make sure you’re studying with the most up-to-date prep materials! Look for the newest edition of this title, The Princeton Review Digital SAT Premium Prep, 2024 (ISBN: 9780593516874, on-sale Jul 2023). Publisher's Note: Products purchased from third-party sellers are not guaranteed by the publisher for quality or authenticity, and may not include access to online tests or materials included with the original product.
Author: The Princeton Review
Publisher: Princeton Review
ISBN: 0525570454
Category : Study Aids
Languages : en
Pages : 834
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Book Description
Make sure you’re studying with the most up-to-date prep materials! Look for the newest edition of this title, The Princeton Review SAT Prep, 2023 (ISBN: 9780593450598, on-sale June 2022). Publisher's Note: Products purchased from third-party sellers are not guaranteed by the publisher for quality or authenticity, and may not include access to online tests or materials included with the original product.
