Amu Darya

The 1st place in the list of the longest rivers in Tajikistan is the Amu Darya (also known as the Amu, Amo River, or Jayhn, and historically as Oxus or Greek o). This is an important river in Central Asia and Afghanistan. The Amu Darya River rises in the Pamir Mountains, north of the Hindu Kush, and is produced by the confluence of the Vakhsh and Panj rivers in the Tigrovaya Balka Nature Reserve on the Afghan-Tajik border, and flows north-westward into the southern remnants of the Aral Sea. The river forms part of Afghanistan's northern border with Tajikistan, Uzbekistan, and Turkmenistan in its upper course. In ancient times, the river was considered to be the border between Greater Iran and "Turan," which roughly matched modern-day Central Asia.

The river's entire length is 2,400 kilometers (1,500 miles), and its drainage basin area is 534,739 square kilometers (206,464 square miles), with a mean discharge of around 97.4 cubic kilometers (23.4 cu mi) of water per year. The river may be navigated for nearly 1,450 kilometers (900 mi). The water comes entirely from the high mountains in the south, where yearly precipitation might exceed 1,000 mm (39 in). Even before wide-scale irrigation, significant summer evaporation meant that not all of this discharge made it to the Aral Sea — however, there is some evidence that the massive Pamir glaciers generated enough meltwater for the Aral to overflow in the 13th and 14th centuries.

Length: 2,400 km (1,500 mi)