|Name origin: Kabi: kalang, meaning good|
|- right||Gin-Gin Creek|
|Source||Dawes, Bobby, and Burnett Range|
|- location||southwest of|
|- elevation||515 m (1,690 ft)|
|- location||north of|
|- elevation||0 m (0 ft)|
|Length||195 km (121 mi)|
|Basin||2,795 km2 (1,079 sq mi)|
|Regional park||Mouth of Kolan River Regional Park|
|Reservoirs||Lake Monduran; Bucca Weir; Kolan Barrage|
Location of Kolan River mouth in Queensland
The river rises in the Bobby Range, below the Dawes Range in the north-east, and the Burnett Range in the south-west. The river flows generally south ans then east towards the settlement of Toweran where the Bruce Highway crosses the river. From this point the river flows south by east and enters Lake Monduran, formed in 1978 by the damming of the river in order to mitigate severe flooding in the river's lower reaches. The river then flows east and then finally north by east and reaches its mouth north of . The Kolan River is joined by nineteen tributaries including the main tributary, Gin-Gin Creek, a watercourse that is 92 kilometres (57 mi) long. The lower reaches of the river are surrounded by sugar cane fields. The Mouth of Kolan River Regional Park is a protected area at the river mouth. The river descends 515 metres (1,690 ft) over its 195-kilometre (121 mi) course.
Other water storage facilities that are supplied with water from the river include the Bucca Weir and the Kolan Barrage.
Macfadyena unguis-cati, commonly known as Cats Claw Creeper, is a rapidly growing clinging vine that has been killing gumtrees on the banks of the Kolan River, leaving damaged tracts of riverbank. In 2007 a water hyacinth outbreak occurred within the Kolan River system.
- "Kolan River (entry 18390)". Queensland Place Names. Queensland Government. Retrieved 19 November 2015.
- "Map of Kolan River, QLD". Bonzle Digital Atlas of Australia. Retrieved 19 November 2015.
- "Water resources - Overview - Queensland - Basin & Surface Water Management Area: Kolan River". Australian Natural Resources Atlas. Department of the Environment, Water, Heritage and the Arts. Retrieved 20 May 2009.
- "Flood Warning System For The Kolan River". Bureau of Meteorology (Australia). Retrieved 20 May 2009.
- van de Wetering, Jodie (11 November 2005). "Are you harbouring an environmental terrorist?". ABC Wide Bay QLD. Australian Broadcasting Corporation. Retrieved 20 May 2009.[dead link]
- "MP warns of disaster if water weed outbreak continues". ABC News. Australia. 22 February 2006. Retrieved 20 May 2009.
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