Balikh River
 The Balikh River is a perennial river that originates in the spring of 'Ayn al-'Arus (Syria). It flows due south and joins the Euphrates at the modern town of Ar-Raqqah. After the Khabur River the Balikh is the largest tributary to the Euphrates on Syrian soil. It is an important source of water and large parts have recently been subjected to canalization.