The Atrek ( fa, اترک, ku, Etrek, tk, Etrek derýasy), also known as the Attruck, Atrak, and Etrek, is a fast-moving

river A river is a natural flowing watercourse, usually freshwater Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the ...

which begins in the mountains of north-eastern

Iran Iran, officially the Islamic Republic of Iran, and also called Persia, is a country located in Western Asia. It is bordered by Iraq and Turkey to the west, by Azerbaijan and Armenia to the northwest, by the Caspian Sea and Turkm ...

(), and flows westward draining into the south-eastern corner of the

Caspian Sea The Caspian Sea is the world's largest inland body of water, often described as the List of lakes by area, world's largest lake or a full-fledged sea. An endorheic basin, it lies between Europe and Asia; east of the Caucasus, west of the broad s ...

Turkmenistan Turkmenistan ( or ; tk, Türkmenistan / Түркменистан, ) is a country located in Central Asia, bordered by Kazakhstan to the northwest, Uzbekistan to the north, east and northeast, Afghanistan to the southeast, Iran to the s ...

. Because of the high use of its waters for irrigation, it only flows into the Caspian when it is in flood stage.

Geography

The Atrek is long and drains a basin of .

Politics

Beginning at , where its tributary the Sumbar joins it, the river forms the border of Iran with

; this helped keep the area closed throughout the Cold War years. A 1957 treaty between

and the USSR assigns equal rights to 50% of the water of the frontier parts of the Atrek. The same treaty also applies to the

Aras River , az, Araz, fa, ارس, tr, Aras The Aras (also known as the Araks, Arax, Araxes, or Araz) is a river in the Caucasus. It rises in eastern Turkey and flows along the borders between Turkey and Armenia, between Turkey and the Nakhchivan excl ...

, which now forms part of the border between Iran and

Azerbaijan Azerbaijan (, ; az, Azərbaycan ), officially the Republic of Azerbaijan, , also sometimes officially called the Azerbaijan Republic is a transcontinental country located at the boundary of Eastern Europe and Western Asia. It is a part of th ...

Ecology

Even though sturgeons concentrate in the area of the Caspian Sea next to the Turkmen coast, they do not currently migrate into the Atrek River owing to its low water level and pollution. Since the Atrek is the only Caspian watershed river of the Turkmen coast, sturgeons no longer reproduce in Turkmenistan.Sturgeons in Turkmenistan

References

{{Rivers of Turkmenistan Rivers of North Khorasan Province Rivers of Turkmenistan International rivers of Asia Iran–Turkmenistan border Landforms of Golestan Province Border rivers Landforms of North Khorasan Province Tributaries of the Caspian Sea

Geography

Politics

Ecology

See also

References