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Question: building a dam is one method of regulating the flow...

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Building a dam is one method of regulating the flow of a river to control flooding. Dams and their reservoirs may also provide recreational opportunities and water for irrigation and hydroelectric power generation. This image, from near Page, Arizona, shows the Grand Canyon and a portion of Lake Powell, the reservoir it created.
A. How did the behavior of the stream likely change upstream from Lake Powell?

B. Given enough time, how might the reservoir change?

C. Speculate on the possible environmental impacts of building a dam such as this one.

chuel Coller

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