The Waters of Euphrates and Tigris

Finally, their lower courses meander across that alluvial plain, which both rivers have created jointly. At Al-Qurnah the rivers join to form the Shatt al-Arab in the southeastern corner of Iraq, which empties into the sea.Having risen in close proximity, the Tigris and Euphrates diverge sharply in their upper courses, to a maximum distance of some 250 miles (400 km) apart near the Turkish-Syrian border.