Amu Darya


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Amu Darya

or

Amudarya

(both: ämo͞o` däryä`, ä`mo͞o där`yə), river, c.1,600 mi (2,580 km) long, formed by the junction of the Vakhsh and Pandj rivers, which rise in the Pamir Mts. of central Asia. It flows generally northwest, marking much of the northern border of Afghanistan with Tajikistan, Uzbekistan, and Turkmenistan before flowing through the Kara KumKara Kum
, two deserts, one in Kazakhstan and one in Turkmenistan. The Caspian Kara Kum or Garagum, the larger desert (c.115,000 sq mi/297,900 sq km), is W of the Amu Darya River and includes most of Turkmenistan. The Murghab and Tejen rivers flow out of the Hindu Kush Mts.
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 desert of Turkmenistan and Uzbekistan, and entering the S Aral Sea through a delta. The river drains c.180,000 sq mi (466,200 sq km). It flows swiftly until it reaches the Kara Kum where its course braids into several channels.

The Amu Darya provides water for irrigation, but this heavy draw on its water has prevented the Amu Darya from replenishing the Aral SeaAral Sea
, salt lake, SW Kazakhstan and NW Uzbekistan, E of the Caspian Sea in an area of interior drainage. To the north and west are the edges of the arid Ustyurt Plateau; the Kyzyl Kum desert stretches to the southeast.
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. Additionally, the river's water is contaminated by agricultural runoff and industrial wastes released in its basin. The Kara Kum Canal (c.500 mi/800 km long) carries water from the Amu Darya near Kelif across S Turkmenistan to Ashgabat and supplements the flow of the Tejen and Murgab rivers. The Amu Darya is paralleled by the Trans-Caspian RR, which has lessened the river's importance as a transport route. In ancient times the Amu Darya was called the Oxus and figured importantly in the history of Persia and in the campaigns of Alexander the Great.

Amu Darya

 

(Latin, Oxus; Arabic, Jaihun), a river in the USSR, the largest in Middle Asia, lying partly on the border between the USSR and Afghanistan. It is formed by the confluence of the Piandzh (Panj) and the Vakhsh and discharges into the Aral Sea. Its length is 1,415 km or 2,540 km if measured from the source of the Piandzh. The area of the Amu Darya basin, as far as the city of Kerki, is 309,000 sq km, not counting the basins of the Zeravshan and the Kashkadar’ia. The catchment area which produces the volume of flow is 227,000 sq km (including the water basins of the Zeravshan and Kashkadar’ia rivers). The basic volume of flow of the Amu Darya derives from the water basins of the Piandzh and the Vakhsh, where névés and glaciers cover large areas (about 10,000 sq km). From the Piandzh-Vakhsh confluence to the Il’chik Gorge, the width of the present-day Amu Darya valley is usually 4–25 km. After passing through the Il’chik Gorge, the river valley becomes box shaped. It is considerably narrower than in the preceding region (for the most part no wider than 2–4 km). The Karakum and Kyzylkum deserts border directly on the river valley. Beyond the Tiuiamuiun Gorge, the Amu Darya passes through the alluvial deposits of an ancient delta; here the valley broadens, achieving a width of several dozen kilometers. The present-day delta begins at the village of Takhiiatos. The channel is subject to frequent variations; the river strays about over its floodplain, eroding now the left, now the right bank. Tributaries enter the Amu Darya only during the first 180 km; for the rest of its length the waters of the Amu Darya are tapped for irrigation and lost to evaporation and seepage, so that its flow gradually diminishes. The principal tributaries of the Amu Darya are the Surkhab (Kunduz), the Kafirnigan, and the Sur-khandar’ia. The water of the Amu Darya is derived mainly from the Piandzh and the Vakhsh, which are fed by glaciers and snow. Influx of water into the Amu Darya usually increases in March, as a result of the thawing of snow in the lower parts of its water basin and partly as a result of flooding from rains. Because of the thawing of snow, firns, and glaciers, the water of the Amu Darya is highest from June through August. Peak flow at the city of Kerki is usually reached in July; the low-water mark for the year is reached during January or February, only rarely in March. Up to 1960, the average volume of flow at Kerki was 2,000 cubic meters per second or 63 cubic kilometers a year. Because of increased tapping of water by the Karakum, Amu-Bukhar, and other canals, the volume of flow of the Amu Darya is diminishing, especially in the lower course of the river during the low-water period. The water of the Amu Darya is noted for its high turbidity (3.3 kilograms per cubic meter); the river has one of the highest figures of suspended sediment in the world. Up to 1960, the Amu Darya carried 210 million tons of sediment a year (at Kerki). The lower course of the Amu Darya freezes over every year. Near the city of Nukus, the river is icebound for almost four months. Along the river, especially the lower course, the banks are lined with tugaic forests (thickets of poplar, tamarisk, oleaster, and reeds). The Amu Darya is inhabited by various species of fish: Pseudoscaphirhynchus, sturgeon (Acipenser nudiventris), barbel, Aspius aspius, carp, and others.

The Amu Darya and its tributaries are important sources of irrigation water, supplying the Tadzhik, Uzbek, and Turkmen SSR’s, as well as Afghanistan. Not counting the basins of the Zeravshan and the Kashkadar’ia or Afghanistan, the Amu Darya basin has 1.26 million hectares of irrigated farmland. Owing to the closed character of the Aral Sea basin and its extremely unfavorable navigational conditions, the Amu Darya is of little value for transportation. The hydroelectric resources of the river and its tributaries are scant. The cities of Kerki and Chardzhou are located along the Amu Darya, and the cities of Urgench, Nukus, and Termez are near the river.

The Amu Darya, within whose basin were located the ancient states of Middle Asia—Chorasmia (at the mouth of the river), Sogdiana, and Bactria (on the middle and upper courses), was already well known in ancient times. In the Middle Ages and subsequently, the river functioned as a trade route from Rus’ to Chorasmia and Bukhara, by way of Astrakhan’ and Emba and then the Aral Sea. The Amu Darya has attracted great attention since the time of Peter I, who sought to bring the river into the orbit of Russian trade. It was at this time that Russian maps appeared, showing the Amu Darya as discharging into the Aral Sea. More or less systematic study of the river began only toward the end of the 19th or the start of the 20th century.

REFERENCE

Shul’ts, V. L. Reki Srednei Azii, 2nd ed., parts 1–2. Leningrad, 1965.

V. L. SHUL’TS

Amu Darya

a river in central Asia, rising in the Pamirs and flowing northwest through the Hindu Kush and across Turkmenistan and Uzbekistan to its delta in the Aral Sea: forms much of the N border of Afghanistan and is important for irrigation. Length: 2400 km (1500 miles)
References in periodicals archive ?
The Karshi Steppe in the Amu Darya Basin which straddles the territories of Uzbekistan and Turkmenistan, and on the Turkmen side there are large gas fields.
The main gas fields are in the Amu Darya region in the east, which include two supergiants, Dauletabad and Donmez, and nine giant fields.
Amul is the ancient name of the Amu Darya River, and Khazar is the ancient name of the Caspian Sea.
the Syr Darya and the Amu Darya. The largest desert in Central Asia, the Kyzylkum, covers the
"Water supply for Uzbekistan's irrigated land is still dependent on the water policies of neighboring countries, located in the upper reaches of the rivers, the actions of which lead to changes in flow regime of the main rivers Syr Darya and Amu Darya, and make it inappropriate for agricultural use.
The Kara Kum desert is bounded by a series of oases watered by the Amu Darya in the north and by rivers (the Murgap, Tejen, Atrek) descending from the Kopetdag Gershi and other mountains in the south.
Thus, the Kazakhstan-Turkmenistan-Iran and Turkmenistan-Afghanistan-Tajikistan railways, airports in Ashgabat and regions of Turkmenistan, highways, bridges across the Amu Darya River, the Turkmenbashi International Seaport, and other facilities that have been already commissioned and are being built in the country should become key links of transnational transport corridors.
A 25-year deal was inked between Afghanistan signed with China's National Petroleum Corporation (CNPC) in December 2011, and the Chinese firm has started extracting oil from the Amu Darya basin in northern part of Afghanistan.
He proposed to build a canal that would deliver 6-7% of Ob River waters to Amu Darya and Syr Darya Rivers and the Aral Sea through the territory of Kazakhstan.
An understanding was also reached with an accompanying Ukrainian government delegation for Kiev firm to speed up construction of a bridge over the Amu Darya River, three compressor stations, drainage tunnels in Ashgabat, engineering installations in Arbachil and water supply infrastructure in Rukhbat region (both near Ashgabat).
The Asian Development Bank (ADB) is aiming to enhance regional cooperation on vital Central Asian waterways whose management and protection are crucial to the region's economic growth and social well-being.The Syr Darya and Amu Darya rivers, which criss-cross a large part of Central Asia, support most of the agricultural output in the Aral Sea basin and have significant hydropower capacity and potential.
One such site in southern Uzbekistan on the banks of the Amu Darya is believed to be the legendary city of Alexandria-Oxiana, or "Alexandria on the Oxus", a logistics base strategically located along the river which served as the superhighway of antiquity in Central Asia, linking the silk road to both the Aral and Caspian Seas.