"Coprates" redirects here. For the valley on Mars, see Coprates Chasma.
River in Iran
The basin of Dez River, as a tributary of Karun River
The Dez (Persian: دز), the ancient Coprates[1] (/ˈkɒprətiːz/;[2]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.