Tigris–Euphrates river system Tigris–Euphrates river system The Tigris and Euphrates, with their tributaries, form a major river system in Western Asia. From sources originating in eastern Turkey, they flow by/through Syria through Iraq into the Persian Gulf. The system is part of the Palearctic Tigris–Euphrates ecoregion, which includes Iraq and parts of Turkey, Syria, Iran, Saudi Arabia, Kuwait, and Jordan. From their sources and upper courses in the mountains of eastern Anatolia, the rivers descend through valleys and gorges to the uplands of Syria and northern Iraq and then to the alluvial plain of central Iraq. The rivers flow in a south-easterly direction
Water supply and sanitation in Iraq Tigris. The key structure is the Atatürk Dam on the Euphrates, which is located approximately 80 km upstream from the Syrian border. Turkey has stated that it would only guarantee a flow downstream from the dam of 15.75 km³/a (500 m³/s) of Euphrates water across the border to the Syrian Arab Republic. This represents about 50% of the natural flow of the Euphrates at the Turkish border. Both Syria and Iraq have tried to inhibit this. They stated that the minimum flow should average at least 700 m³/s but so far Turkey rejected this claim.(10) Syria is in the unusual