|An open youthful wave dominated barrier estuary; or perennial stream|
|State||New South Wales|
|Regions||South East Corner (IBRA), South Coast|
|Local government area||Bega Valley|
|- left||Stevens Creek|
|Source confluence||Narrabarba Creek and Watergums Creek|
|- elevation||44 m (144 ft)|
|Mouth||Tasman Sea, South Pacific Ocean|
|- location||Disaster Bay, near Green Cape|
|Length||18 km (11 mi)|
|Depth||2.7 m (9 ft)|
|Basin||335 km2 (129 sq mi)|
|Area||4.2 km2 (2 sq mi)|
|National park||Ben Boyd NP|
|Website: NSW Environment & Heritage webpage|
Course and features
Wonboyn River is formed by the confluence of Narrabarba Creek and Watergums Creek, within Ben Boyd National Park, east of the Princes Highway and southeast of the locality of Kiah, approximately 3 kilometres (1.9 mi) north of Timbillica Hill. The river flows generally east, northeast, and then southeast, joined by one minor tributary, flowing through Wonboyn Lake, before reaching its mouth within Disaster Bay, at the Tasman Sea of the South Pacific Ocean southeast of Green Cape. The river descends 44 metres (144 ft) over its 18 kilometres (11 mi) course.
The catchment area of the river is 335 square kilometres (129 sq mi) with a volume of 9,809 megalitres (346.4×106 cu ft) over a surface area of 4.2 square kilometres (1.6 sq mi), at an average depth of 2.7 metres (8 ft 10 in).
- "Wonboyn River". Geographical Names Register (GNR) of NSW. Geographical Names Board of New South Wales. Retrieved 1 June 2013.
- Roy, P. S; Williams, R. J; Jones, A. R; Yassini, I; et al. (2001). "Structure and Function of South-east Australian Estuaries". Estuarine, Coastal and Shelf Science. 53: 351–384. doi:10.1006/ecss.2001.0796.
- "Map of Wonboyn River, NSW". Bonzle Digital Atlas of Australia. Retrieved 1 June 2013.
- "Wonboyn River". Coastal and floodplain management: Coastal zone management: Estuaries of NSW. NSW Environment and Heritage. 27 April 2012. Retrieved 1 June 2013.
- "Towamba & Genoa catchment" (map). Office of Environment and Heritage. Government of New South Wales.