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.
Rageh Valley, like many other valleys in Iran, has been created due to water erosion. There is a seasonal river in the depths of this valley, which over time has washed away the soil and rocks and its emergence.
Kamrdogh waterfall is one of the largest and widest waterfalls in Iran, which with its beautiful scenery can be introduced as one of the important tourist destinations in "Kohgiluyeh and Boyer-Ahmad" province.