Map of the Tigris-Euphrates Watershed
|Countries||Turkey, Syria, Jordan, Saudi Arabia, Kuwait and Iraq|
|- location||Eastern Turkey|
|- elevation||4,500 m|
|Mouth||Shatt al Arab|
|Basin size||765,831 km²|
|- average||818 m³/s|
The Euphrates is the western of the two rivers that define the borders of Mesopotamia. The other is the Tigris, which joins the Euphrates to form the Shatt-al-Arab and flow into the Persian Gulf. Several dams have been built since the 1970s. As a result, less water flows down the river into the sea.