Once a coastal city near the mouth of the Euphrates on the Persian Gulf , the coastline has shifted and Ur is now well inland , south of the Euphrates on its right bank , 16 kilometres ( 9.9 mi ) from Nasiriyah .
It is now well inland , south of the Euphrates on its right bank , 16 kilometres ( 9.9 mi ) from Nasiriyah , Iraq .