Kofarnihon

The Kofarnihon (Tajik: оaрнион, Uzbek: Kofarnihon, Russian: аирниан Kafirnigan) is the last river on Toplist's list of the longest rivers in Tajikistan. It is one of Tajikistan's primary tributaries of the Amu Darya, along with the Vakhsh and Panj. The river is 387 kilometers (240 miles) long and has an area of 11,600 square kilometers in its basin (4,500 sq mi).

It begins on the southern slopes of the Gissar Range in Vahdat district, previously Kofarnihon district, and flows in a general south-western direction past the cities of Vahdat and Dushanbe before turning south and running through Khatlon Province reaching the Afghan border. It flows into Amudarya about 40 kilometers west of the junction of the Vakhsh and Panj rivers. The Kofarnihon is a major supply of drinking water, although it is heavily contaminated by irrigation runoff and badly cleansed recycled water in the Dushanbe and Vahdat areas. It constitutes a portion of the boundary between Tajikistan and Uzbekistan. The Varzob and Khanaka from the right, and the Elok from the left, are its primary tributaries.

Length: 387 km (240 mi)