Kazakhstan and Uzbekistan Agree to Share Water Resources From Syr Darya River

Historic Accord Addresses Central Asia's Most Contentious Resource Dispute

Kazakhstan and Uzbekistan signed a 20-year water-sharing framework for the Syr Darya River on February 2, 2026, in Astana, resolving a dispute that has strained relations since the Soviet era. The agreement allocates 37% of the river's annual flow to Kazakhstan and 42% to Uzbekistan, with the remaining 21% designated for environmental flows to sustain the shrinking Aral Sea.

Kazakh President Kassym-Jomart Tokayev and Uzbek President Shavkat Mirziyoyev signed the accord at a bilateral summit. "Water is the most strategic resource in Central Asia. This agreement ensures our peoples will not fight over it," Tokayev said.

Allocation Mechanism

The framework establishes a joint water commission with monitoring stations along the 2,212-kilometer river and real-time data sharing between national water agencies. Uzbekistan agreed to reduce cotton irrigation withdrawals by 15% over five years through drip irrigation investment, while Kazakhstan committed to releasing water from the Shardara reservoir during Uzbekistan's growing season.

The agreement addresses the perennial conflict between upstream energy production and downstream irrigation. Kyrgyzstan, which controls the headwaters through the Toktogul reservoir, was not party to the agreement but has been consulted through the International Fund for Saving the Aral Sea.

Aral Sea Provisions

The environmental flow allocation of 21% is a breakthrough, representing the first binding commitment by either country to direct water specifically toward Aral Sea restoration. The World Bank estimated that the North Aral Sea in Kazakhstan could recover to 50% of its 1960 surface area by 2040 if the agreed flows are maintained.

The UN Environment Programme's Central Asia office praised the environmental provisions but cautioned that enforcement would require "sustained political commitment beyond the current administrations." Previous water-sharing agreements in the region have been undermined by droughts and competing domestic pressures.

Economic Context

Water scarcity threatens both nations' agricultural sectors, which employ 25% of Kazakhstan's and 27% of Uzbekistan's labor force. Climate projections by the Central Asian Institute of Applied Geosciences indicate that glacial meltwater feeding the Syr Darya will decline by 30% by 2050, making efficient allocation increasingly urgent.

The Asian Development Bank pledged $1.5 billion in concessional financing for water infrastructure under the agreement, including irrigation modernization in Uzbekistan's Fergana Valley and expansion of Kazakhstan's North Aral Sea restoration dam system.