Badain Jaran Desert
Encyclopedia
The Badain Jaran Desert is a desert in China
China
Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...

 which spans the provinces of Gansu
Gansu
' is a province located in the northwest of the People's Republic of China.It lies between the Tibetan and Huangtu plateaus, and borders Mongolia, Inner Mongolia, and Ningxia to the north, Xinjiang and Qinghai to the west, Sichuan to the south, and Shaanxi to the east...

, Ningxia
Ningxia
Ningxia, formerly transliterated as Ningsia, is an autonomous region of the People's Republic of China. Located in Northwest China, on the Loess Plateau, the Yellow River flows through this vast area of land. The Great Wall of China runs along its northeastern boundary...

 and Inner Mongolia
Inner Mongolia
Inner Mongolia is an autonomous region of the People's Republic of China, located in the northern region of the country. Inner Mongolia shares an international border with the countries of Mongolia and the Russian Federation...

. It covers an area of 49,000 sq. kilometers (19,000 sq. miles).

This desert is home to the tallest stationary dune
Dune
In physical geography, a dune is a hill of sand built by wind. Dunes occur in different forms and sizes, formed by interaction with the wind. Most kinds of dunes are longer on the windward side where the sand is pushed up the dune and have a shorter "slip face" in the lee of the wind...

s on Earth. Some of the dunes reach a height of 500 meters (1,600 ft.). The dunes are kept in place in the arid, windy region by an underground water source. Analyses of the ground water indicates that it is snowmelt that flows through fractured rock from mountains hundreds of kilometers away.

The desert also features over 100 spring-fed lakes that lie between the dunes, some of which are fresh while others are extremely saline. These lakes give the desert its name which is Mongolian for "mysterious lakes". It is also crossed by one river, the Ruo Shui
Ruo Shui
Ruo Shui is a large river of northern China. It flows approximately from its headwaters in the Qilian Mountains north-northeast into an endorheic valley in the Badain Jaran Desert. The river forms one of the largest inland deltas or alluvial fans in the world...

("weak water"), which has formed a great alluvial plain in the desert.
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