Woronora River

Woronora
Woronora River
NASA satellite view of Greater Metropolitan Sydney, with the location of the mouth of the Woronora River, as marked
EtymologyAboriginal (Dharug): "black rocks"
Location
CountryAustralia
StateNew South Wales
RegionGreater Metropolitan Sydney
LGASutherland Shire
Physical characteristics
SourceIllawarra escarpment
2nd sourceWaratah Rivulet
  locationnear Darkes Forest
  coordinates34°23′17″S 150°54′18″E / 34.38806°S 150.90500°E / -34.38806; 150.90500
  elevation353 m (1,158 ft)
Mouthconfluence with the Georges River
  location
between Como and Illawong
  coordinates
33°59′40″S 151°4′3″E / 33.99444°S 151.06750°E / -33.99444; 151.06750
  elevation
0 m (0 ft)
Length36 km (22 mi)
Basin size174 km2 (67 sq mi)
Basin features
River systemGeorges River catchment
Tributaries 
  leftStill Creek (New South Wales)
  rightHeathcote Creek, Forbes Creek (New South Wales)
DamWoronora (1941)

The Woronora River is a perennial river of the Sydney Basin, located in the Sutherland Shire local government area of Greater Metropolitan Sydney, approximately 22 kilometres (14 mi) south of the Sydney central business district, in New South Wales, Australia.

'Woronora' is an Aboriginal place name. Records show the spelling of the name has varied since it first appeared in the 19th century, the earliest being Wooloonora (Dixon, 1827, quoted in Walker 1974:66, followed by Wolonora (Dixon, 1837, and Woronora Mitchell, 1835). The name was first applied to the Woronora River, a tributary of the Georges River, before being given to an electoral district, a local road east of the river, and finally the suburb itself.

The Woronora River rises on the northwestern slopes of the Illawarra escarpment and has its origin from Waratah Rivulet, near Darkes Forest, and flows generally north for approximately 36 kilometres (22 mi), joined by three minor tributaries, before reaching its confluence with the Georges River, between Como and Illawong.