Sirvan river is the most important river in Kurdistan province. Numerous tributaries of springs and small rivers in the northern and southern parts of Kurdistan province join and form the Sirvan river. This river then enters Kermanshah province and after joining several other tributaries in this province, it enters Iraq and flows into the lake behind Darbandikhan dam in Sulaimaniyah province of Iraq.
In the provinces of Kurdistan and Kermanshah, several dams have been built on the tributaries of the Sirvan River. Darian Dam is the newest dam that has been built on Sirvan River between Hajij and Darian villages.
With the beginning of water intake of Darian Dam in 2015, gradually, a long lake with a length of about thirty kilometers was created in the beautiful forest valleys of Kurdistan. This lake is one of the most beautiful lakes behind the dam in Iran and has a lot of talent for tourism, water sports and recreation.
