The Dez (Persian: دز), the ancient Coprates (/ˈkɒprətiːz/; Greek: Κοπράτης or Κοπράτας), is a river in Iran. This 400 km long river is a tributary of the Karun River. It is the site of the Dez Dam.
Aerial view of the Dez Reservoir, in the area of Andimeshk, Khuzestan
