Asia - Lakes, Rivers, Geography (2024)

Lakes of Asia

inAsiainLand

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  • Asia - Children's Encyclopedia (Ages 8-11)
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Written by

Pierre Gourou Honorary Professor, College of France, Paris. Emeritus Professor of Geography, Free University of Brussels. Author of L'Asie.

Pierre Gourou,

Chakravarthi V. Narasimhan Senior Fellow, United Nations Institute for Training and Research, New York City; Under-Secretary-General for Inter- Agency Affairs and Coordination, United Nations, 1973–78. Author of The United Nations:...

Chakravarthi V. NarasimhanAll

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Last Updated: Article History

The many lakes of Asia vary considerably in size and origin. The largest of them—the Caspian and Aral seas—are the remains of larger seas. The Caspian has been fluctuating in size, and the Aral has been shrinking, primarily because its tributaries, the Amu Darya and the Syr Darya, have been tapped heavily for irrigation purposes. Lakes Baikal, Ysyk-Köl, and Hövsgöl (Khubsugul), the Dead Sea, and others lie in tectonic depressions. The basins of Lakes Van, Sevan, and Urmia are, furthermore, encircled by lava, and Lake Telets was gouged out by ancient glaciation. A number of lakes were formed as the result of landslides (Lake Sarez in the Pamirs), karst processes (the lakes of the western Taurus, in Turkey), or the formation of lava dams (Lake Jingpo in northeastern China and several lakes in the Kuril Islands). In the volcanic regions of the eastern Asian islands, in the Philippines, and in the Malay Archipelago, lakes have formed in craters and calderas. The subarctic has a particularly large number of lakes; in addition to lakes formed as a result of melting permafrost and subsidence, there are also ancient glacial moraine lakes. Many lagoonal lakes occur along low coastlines.

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The lakes in the internal drainage basins—such as Koko Nor, Lake Tuz, and others—are usually saline. Lake Balkhash has fresh water in the west and brackish water in the east. Lakes through which rivers flow are freshwater and regulate the flow of the rivers that issue from them or flow into them; notable examples are Lake Baikal, associated with the Angara River; Lake Khanka (the Song’acha and Ussuri rivers); Dongting Lake and Lake Poyang (the Yangtze River); and Tonle Sap (the Mekong). Large reservoirs have also been created by constructing hydroelectric stations.

Groundwater

In arid regions groundwater (subterranean water) is often the only source of water. Large accumulations are known to exist in artesian basins and beneath the dipping plains at the foot of mountains; those basins are associated with the extensive oases of Central Asia, Kashgaria, and many other regions.

Soils

The soils of Asia are marked by the combined effects of climate, topography, hydrology, plant and animal life, age, and economic activities. All of those factors vary considerably from one part of that vast continent to another, from north to south, and from lower to higher elevations in mountainous regions. The soil also shows a horizontal zonality that is especially clearly defined in the continental plains.

Asia - Lakes, Rivers, Geography (2024)

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