The Tuyamuyun Hydro Complex (THC) is a system of four interconnected reservoirs and a series of canals on the lower Amu Darya River, bordering Uzbekistan and Turkmenistan.

Its primary purpose is to provide water for irrigation in Xorazm, Karakalpakstan and Daşoguz regions of Uzbekistan, Turkmenistan and as far north as Kazakhstan.

It creates the Channel Reservoir which has a storage capacity of about 2,300,000,000 m3 (1,900,000 acre⋅ft) and length of 102 km (63 mi).

[2] Diversion of river water into these canals, along with similar diversions of water from the nearby Syr Darya River, has greatly contributed to the desiccation of most of the Aral Sea, an endorrheic lake basin.

Prior to damming and diversion, the two rivers were the main sources of surface water that replenished the lake.