How Long to Read Grand Canyon, A Century of Change

How Long Does it Take to Read Grand Canyon, A Century of Change?

It takes the average reader 4 hours and 50 minutes to read Grand Canyon, A Century of Change by Robert H. Webb

Assuming a reading speed of 250 words per minute. Learn more

Description

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.

How long is Grand Canyon, A Century of Change?

Grand Canyon, A Century of Change by Robert H. Webb is 290 pages long, and a total of 72,500 words.

This makes it 98% the length of the average book. It also has 89% more words than the average book.

How Long Does it Take to Read Grand Canyon, A Century of Change Aloud?

The average oral reading speed is 183 words per minute. This means it takes 6 hours and 36 minutes to read Grand Canyon, A Century of Change aloud.

What Reading Level is Grand Canyon, A Century of Change?

Grand Canyon, A Century of Change is suitable for students ages 12 and up.

Note that there may be other factors that effect this rating besides length that are not factored in on this page. This may include things like complex language or sensitive topics not suitable for students of certain ages.

When deciding what to show young students always use your best judgement and consult a professional.

Where Can I Buy Grand Canyon, A Century of Change?

Grand Canyon, A Century of Change by Robert H. Webb is sold by several retailers and bookshops. However, Read Time works with Amazon to provide an easier way to purchase books.

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