KarunThe Karun (کارون, kɒːˈɾuːn) is the Iranian river with the highest water flow, and its only navigable river. It is 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). The Karun continues toward the Persian Gulf, forking into two primary branches on its delta – the Bahmanshir and the Haffar – that join the Arvand Rud, emptying into the Persian Gulf.
AhvazAhvaz (Ahvâz ʔæhˈvɒːz) is a city in the Central District of Ahvaz County, Khuzestan province, Iran, and serves as capital of the county, the district, and the province. It is home to Persians, Arabs, Bakhtiaris, Dezfulis, Shushtaris, and others. Languages spoken in the area include Persian and Arabic, as well as of Luri (Bakhtiari), Dezfuli, Shushtari, and others. Ahvaz's population is about 1,300,000 and its built-up area with the nearby town of Sheybani is home to 1,136,989 inhabitants.
Khuzestan provinceKhuzestan province (also spelled Xuzestan; استان خوزستان Ostān-e Xūzestān) is one of the 31 provinces of Iran. It is in the southwest of the country, bordering Iraq and the Persian Gulf. Its capital is Ahvaz and it covers an area of . Since 2014, it has been part of Iran's Region 4. At the 2006 National Census, Khuzestan province had a population of 4,192,598 in 862,491 households. The following census in 2011 counted 4,531,720 people in 1,112,664 households.