Iran houses the "Karun River". The Karun is Iran's most affluent and only navigable river. It is 950 km long. It rises in the Zard Kuh mountains of the Bakhtiari district in the Zagros Range, receiving many tributaries, such as the Dez and the Kuhrang, before passing through the capital of the Khuzestan Province of Iran, the city of Ahvaz before emptying to its mouth into Arvand Rud (Shatt al-Arab).
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