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Book Initiation and frequency of debris flows in Grand Canyon Arizona

Download or read book Initiation and frequency of debris flows in Grand Canyon Arizona written by Peter G. Griffiths and published by . This book was released on 1996 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Sediment Delivery by Ungaged Tributaries of the Colorado River in Grand Canyon U S Geological Survey Water Resources Investigations Report 00 4055 2000

Download or read book Sediment Delivery by Ungaged Tributaries of the Colorado River in Grand Canyon U S Geological Survey Water Resources Investigations Report 00 4055 2000 written by and published by . This book was released on 2000 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Debris flows from tributaries of the colorado rivers grand canyon national park arizona executive summary usgs ofr 87 117

Download or read book Debris flows from tributaries of the colorado rivers grand canyon national park arizona executive summary usgs ofr 87 117 written by Robert H. Webb and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Water resources Investigations Report

Download or read book Water resources Investigations Report written by and published by . This book was released on 2000 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Debris Flows in Grand Canyon National Park Arizona

Download or read book Debris Flows in Grand Canyon National Park Arizona written by Theodore S. Melis and published by . This book was released on 1993 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Frequency and Initiation of Debris Flows in Grand Canyon Arizona

Download or read book Frequency and Initiation of Debris Flows in Grand Canyon Arizona written by Peter G. Griffiths and published by . This book was released on 2004 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Geomorphology of Debris Flows and Alluvial Fans in Grand Canyon National Park and Their Influence on the Colorado River Below Glen Canyon Dam Arizona

Download or read book Geomorphology of Debris Flows and Alluvial Fans in Grand Canyon National Park and Their Influence on the Colorado River Below Glen Canyon Dam Arizona written by Theodore S. Melis and published by . This book was released on 1997 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Grand Canyon A Century of Change

Download or read book Grand Canyon A Century of Change written by Robert H. Webb and published by University of Arizona Press. This book was released on 2021-11-30 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photographs made in Grand Canyon a century ago may provide us today with a sense of history; photographs made a century later from the same vantage points give us a more precise picture of change in this seemingly timeless place. Between 1889 and 1890, Robert Brewster Stanton made photographs every 1-2 miles through the river corridor for the purpose of planning a water-level railroad route and produced the largest collection of photographs of the Colorado River at one point in time. Robert Webb, a USGS hydrologist conducting research on debris flows in the Canyon, obtained the photographs and from 1989 to 1995 replicated all 445 of the views captured by Stanton, matching as closely as possible the original camera positions and lighting conditions. Grand Canyon, a Century of Change assembles the most dramatic of these paired photographs to demonstrate both the persistence of nature and the presence of humanity. Unexpected longevity of some plant species, effects of animal grazing, and expansion of cacti are all captured by the replicate photographs. More telling is evidence of the impact of Glen Canyon Dam: increased riparian vegetation, new marshes, aggraded debris fans, and eroded sand bars. In the accompanying text, Webb provides a thorough analysis of what each pair of photographs shows and places the project in its historical context. Complementing his narrative are six sidebar articles by authorities on Canyon natural history that further attest to a century of change. The level of detail obtained from the photographs represents one of the most extensive long-term monitoring efforts ever conducted in a national park; it is the most detailed documentation effort ever performed using repeat photography. Much more than simply a picture book, Grand Canyon, a Century of Change is an environmental history of the river corridor, a fascinating book that clearly shows the impact of human influence on Grand Canyon and warns us that its future is very much in our hands.

Book The Controlled Flood in Grand Canyon

Download or read book The Controlled Flood in Grand Canyon written by Robert H. Webb and published by American Geophysical Union. This book was released on 1999-01-26 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Book The Colorado River Through Grand Canyon

Download or read book The Colorado River Through Grand Canyon written by Steven Warren Carothers and published by . This book was released on 1991 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adjustment to the environmental alterations of the Glen Canyon Dam.