سد الفرات
The upper reaches of the Euphrates flow through steep canyons and gorges, southeast across Syria, and through Iraq. From west to east, the Euphrates is in Syria joined by the Sajur, the Balikh and the Khabur. Lake Assad is a large lake in Syria on the Euphrates River formed by the construction of the Tabqa Dam in 1973. The sites of Tell Abu Hureyra and Mureybet ancient Mesopotamian cities of the Euphrates, are underneath this lake.