Water resources of Turkmenistan.

“Books are the plane, and the train, and the road. They are the destination, and the journey. They are home” 

Anna Quindlen,

Excursions to river Atrek.

The only river of Turkmenistan belonging to the basin of the Caspian Sea. The length of the Atrek river is 669 kilometers, the basin area is 27.3 thousand square kilometers, the average water consumption is 13.2 cubic meters per second.
The sources and the majority of its currents lie in Iran on the southern slopes of Kopetdag, and only 140 kilometers of the lower reaches are in Turkmenistan, where it carries only a very small part of its flow. Soon after the river reaches the border of Turkmenistan, the last and largest tributary, the Sumbar River, flows into it from the right.
Atrek is low in water even compared to Tedjen. This is due to the fact that in its basin, mountain ranges do not exceed 2000 - 3000 meters above sea level. In addition, they are unfavorably located relative to moisture-bearing air masses.
The Atrek channel is laid in fragile rocks, Atrek has another feature - a record turbidity of water, the largest among all the rivers of Central Asia and one of the largest in the world in general. Each cubic meter of its water on average contains 25 kilograms of suspended particles, which is six times the turbidity of the Amu Darya.

Authority:
http://www.cawater-info.net/bk/water_land_resources_use/docs/rivers.html