Do-Polan is a village in Ardal city in Chaharmahal and Bakhtiari province. The name of this village is derived from two old bridges on the river close to the village.
Mehrian has a clear and beautiful river. This river eventually joins the Beshar River to enter Khuzestan province as one of the tributaries of the Karun River.
"Shah Bahram" is one of the beautiful rivers of "Kohgiluyeh and Boyer-Ahmad" province, which along its route causes the development and irrigation of many agricultural lands.
Mand River is one of the most important rivers in Bushehr province, which originates from the mountains of Fars province and after a long route, finally flows into the Persian Gulf.