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Water Levels in Lake Powell
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Water Levels in Lake Powell

In the 1950s, construction began on the Glen Canyon Dam on the Colorado River in northern Arizona. The dam created Lake Powell: a long, skinny, meandering reservoir straddling the Arizona-Utah border. Ingenuity of human design, however, did not protect this massive reservoir from the drought that struck much of the southwestern United States between 2000 and 2007.

Published Oct 17, 2007

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Lake Powell and The Rincon, Utah
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Lake Powell and The Rincon, Utah

Man and nature have both altered the course of a southwestern U.S. river.

Published May 21, 2012

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Lake Nasser, Egypt
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Lake Nasser, Egypt

One of the world’s largest artificial lakes, Lake Nasser is named after the Egyptian President Gamal Abdul Nasser, who is largely responsible for the lake’s creation. President Nasser decided to build the Aswan High Dam across the Nile, forming a lake approximately 550 kilometers (340 miles) long.

Published Nov 3, 2005

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Fueled by the Nile
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Fueled by the Nile

Irrigation from Lake Nasser, one of the world’s largest man-made lakes, has increased the amount of arable land and crop production in Egypt.

Published Jul 8, 2020

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Hells Canyon National Recreation Area
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Hells Canyon National Recreation Area

This natural-color image of Hells Canyon was captured by NASA’s Landsat-7 satellite on September 19, 2002. The image shows the northern part of the canyon, where the Imnaha River joins the Snake River.

Published Mar 8, 2009

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Tempe Town Lake Drain
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Tempe Town Lake Drain

These satellite images show Tempe Town Lake before and after a rubber dam maintaining the reservoir burst.

Published Aug 8, 2010

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Restoration of the Elwha River
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Restoration of the Elwha River

Acquired August 10, 2004, and May 12, 2012, these images show big changes along the Elwha River thanks to the largest dam removal in U.S. history.

Published Aug 25, 2012

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A Curious Ensemble of Wonderful Features
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A Curious Ensemble of Wonderful Features

Parts of the Glen Canyon that John Wesley Powell explored in 1869 have been submerged by Lake Powell.

Published Oct 16, 2016

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The Colorado River
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The Colorado River

Published Jun 12, 2001

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Lake Sarez, Tajikistan
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Lake Sarez, Tajikistan

Lake Sarez, deep in the Pamir mountains of Tajikistan, was created 90 years ago when a strong earthquake triggered a massive landslide that, in turn, became a huge dam along the Murghob River, now called the Usoi Dam. The resulting lake is perched above surrounding drainages at an elevation greater than 3000 meters. The lake is 61 kilometers long and as deep as 500 meters, and holds an estimated 17 cubic kilometers of water. The area experiences considerable seismic activity, and scientists fear that part of the right bank may slump into the lake, creating a huge wave that will top over and possibly breach the natural dam. Such a wave would create a catastrophic flood downstream along the Bartang, Panj and Amu Darya Rivers, perhaps reaching all the way to the Aral Sea.

Published Jan 6, 2002

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Three Gorges Dam, China
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Three Gorges Dam, China

The longest river in Asia, the Yangtze River brings mixed blessings to China. Although it meets the water needs of millions of people, the river regularly overflows its banks. To protect residents and land in the lower Yangtze floodplains, China began construction on the Three Gorges Dam in 1994.

Published Jun 13, 2007

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