Hawkesbury River

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Coordinates: 33°33′53.9994″S 151°18′0″E / 33.564999833°S 151.30000°E / -33.564999833; 151.30000
Hawkesbury River (Deerubbun)
Semi–mature tide dominated, drowned valley estuary[1]
Hawkesbury River, Northern Sydney aerial.jpg
Aerial photograph showing the mouth of the Hawkesbury River as it flows into Broken Bay and out into the Tasman Sea, as seen looking across Sydney's Northern Beaches
Country Australia
State New South Wales
Region Greater Metropolitan Sydney
Tributaries
 - left Colo River, Webbs Creek, Macdonald River, Mangrove Creek, Popran Creek, Mooney Mooney Creek
 - right Cattai Creek, South Creek, Berowra Creek
Primary source Nepean River
 - location north of Penrith
Secondary source Grose River
Mouth Broken Bay
 - location west of Lion Island
 - coordinates 33°33′53.9994″S 151°18′0″E / 33.564999833°S 151.30000°E / -33.564999833; 151.30000
Length 120 km (75 mi)
Depth 13.8 m (45 ft)
Volume 1,541,412 m3 (54,434,451 cu ft)
Basin 21,624.1 km2 (8,349 sq mi)
Area 114.5 km2 (44 sq mi)
Discharge
 - average 95 m3/s (3,355 cu ft/s)
 - max 15,000 m3/s (529,720 cu ft/s)
 - min 0 m3/s (0 cu ft/s)
Islands Milson Island, Peat Island, Spectacle Island, Long Island, and Dangar Island
Website: NSW Environment and Heritage webpage

The Hawkesbury River, is a semi–mature tide dominated drowned valley estuary[1] located to the west and north of Sydney, New South Wales, Australia. The Hawkesbury River and its associated main tributary, the Nepean River, virtually encircle the metropolitan region of Sydney.

The Hawkesbury River has its origin at the confluence of the Nepean River and the Grose River, to the north of Penrith and travels for approximately 120 kilometres (75 mi) in a north–easterly and then south–easterly direction to its mouth at Broken Bay, about 15 kilometres (9.3 mi) from the Tasman Sea. The Hawkesbury River is the main tributary of Broken Bay. Secondary tributaries include Brisbane Water and Pittwater, that together with the Hawkesbury River flow into the Tasman Sea at Barrenjoey Head.

The total catchment area of the river is approximately 21,624 square kilometres (8,349 sq mi) and the area is generally administered by the Hawkesbury–Nepean Catchment Management Authority.

The land adjacent to the Hawkesbury River was occupied for many thousands of years by the Darkinjung, Darug, Eora, and Kuringgai Aboriginal peoples. They used the river as an important source of food and a place for trade.[2]

Course[edit]

Looking north–east across the Hawkesbury River, with Dangar Island to the right of the image.
Looking south–east across the Hawkesbury River, from near Brooklyn.

The headwaters of the Hawkesbury River, the Avon River, the Cataract River, and the Cordeaux River, rise only a few miles from the sea, about 80 kilometres (50 mi) south of Sydney. These streams start on the inland-facing slopes of the plateau which forms the escarpment behind Wollongong. Flowing north-west, away from the sea, these streams combine to form the Nepean River, and flow north past the towns of Camden and Penrith. Near Penrith, the Warragamba River emerges from its canyon through the Blue Mountains and joins the Nepean. The Warragamba, formed by the joining of the Wollondilly River, the Nattai River, the Kowmung River and Coxs River drains a broad region of New South Wales on the eastern side of the Great Dividing Range. The other principal component of the upper Hawkesbury river system, the Grose River, rises in the area of Mount Victoria in the Blue Mountains.

Once formed, the Hawkesbury River proper flows generally northwards, albeit with a significant number of meanders. Initially the river passes the towns of Richmond and Windsor, which are the largest settlements on the river. At Windsor, the river is joined by the South Creek, which drains much of the urban runoff in Sydney's western suburbs that does not fall into the Parramatta River catchment. As it flows north, it enters a more rural area, with only small settlements on the river. On this stretch it passes Sackville and Lower Portland, where it is joined by the Colo River. The Colo River and its tributaries drain the northern section of the Blue Mountains.

From Lower Portland, the Hawkesbury River continues flowing northwards to the small community of Wisemans Ferry where it is joined by the Macdonald River. Here its course turns eastwards and the surrounding landscape gradually becomes steeper and more rugged. At Spencer, Mangrove Creek joins the river from the north. From here to the river mouth, road access to the river is limited to a few points.

At Milsons Passage, the river is joined by Berowra Creek from the south. In the area around Brooklyn the river is crossed by the major road and rail services that follow the coast north from Sydney. The river finally reaches the ocean at Broken Bay.

From the confluence of the Nepean and Grose Rivers to the sea, the Hawkesbury River has a total length of some 120 kilometres (75 mi).[3]

Islands[edit]

Islands in the Hawkesbury River include, in order going downstream are Barr Island, Milson Island, Peat Island, Spectacle Island, Long Island, and Dangar Island.

Crossings[edit]

Despite forming the effective boundary of the metropolitan region of Sydney for its entire length, there are very few fixed crossings of the Hawkesbury River proper. Going downstream, these comprise:

Crossing name
(Unofficial name)
Left bank crossing location Right bank crossing location Comments/use Image
Richmond Bridge North Richmond Richmond A bridge that carries the historic Bells Line of Road and formerly carried the Kurrajong extension of the Richmond railway line.
Windsor Bridge Richmond Windsor A bridge that carries the Putty Road.
Sackville Ferry Sackville A vehicular cable ferry. Sackville ferry gnangarra-15.jpg
Lower Portland Ferry Lower Portland A vehicular cable ferry.
Webbs Creek Ferry Wisemans Ferry A vehicular cable ferry just upstream of the settlement of Wisemans Creek. Webbs creek ferry-1w.jpg
Wisemans Ferry A vehicular cable ferry at the settlement of Wisemans Creek that carries the old Great North Road. Wisemans Ferry.jpg
Hawkesbury River Freeway Bridge Mooney Mooney Kangaroo Point Carries the Sydney-Newcastle Freeway parallel to Peats Ferry Bridge. Hawkesbury River road bridges.jpg
Peats Ferry Bridge An older bridge that carries the Pacific Highway.
Hawkesbury River Railway Bridge Cogra Point Brooklyn A bridge that carries the Newcastle and Central Coast railway line. Hawkesbury River rail bridge.jpg

In the lower reaches of the river there are also a few passenger ferries that cross the river. These include the Palm Beach Ferry service from Palm Beach to Ettalong and Wagstaffe, and the Hawkesbury River Ferries service from Brooklyn to Dangar Island and Little Wobby.

History[edit]

Aboriginal history[edit]

The Aboriginal name for the river was published as Deerubbun in 1870.[4] The two main Aboriginal tribes inhabiting the area were the Wannungine of the coastal area on the lower reaches (below Mangrove Creek) and the Darkinung people, whose lands were extensive on the lower Hawkesbury to Mangrove Creek, upper Hawkesbury, inland Hunter and lower Blue Mtns.[5]

European history[edit]

The Hawkesbury River was named by Governor Phillip in 1789

In 1789 two expeditions explored the Hawkesbury to the northwest of Sydney and the Nepean River to the southwest. It took about three years to realise they had discovered the same river system.[citation needed]

The Hawkesbury River was one of the major transportation routes for transporting food from the surrounding area to Sydney during the 1800s. Boats would wait in the protection of Broken Bay and Pittwater, until favourable weather allowed them to make the ocean journey to Sydney Heads. With the opening of the railway from Sydney to Windsor in 1864, farm produce could be shipped upriver for onward transportation by train. However, by the 1880s the river had become silted up between Sackville and Windsor, and Sackville became the head of navigation for sea-going vessels. Until the end of the 19th century coastal steamers linked Sackville to Sydney.[6][7][8]

The Hawkesbury River was named by Governor Phillip in June 1789, after Charles Jenkinson, 1st Earl of Liverpool, who at that time was titled Baron Hawkesbury.[3] An obelisk was unveiled in 1939 at Brooklyn to commemorate the naming. In 1794, 22 families were granted land at Bardenarang, now known as Pitt Town Bottoms, near Windsor. In that same year, confrontations between Aboriginal people and settlers broke out.[9][10]

River usage[edit]

Hawkesbury River Marina
A seaplane on the Hawkesbury River

Navigation[edit]

The Hawkesbury River is navigable from Windsor to the sea. There are no dams or locks on the river, and the effects of the tide are felt as far as Windsor.[11]

Whilst use of the river to carry farm produce and other goods has now largely been superseded by road transport, the river remains the only form of access to a significant number of isolated homes and communities. This is especially true in the lower reaches of the river, where the steep and rugged terrain inhibits road construction. One consequence of this is the operation of Australia's last riverboat postman, a river service that delivers mail to properties on the river between Brooklyn and Spencer.[12]

Sporting activities[edit]

The Hawkesbury Canoe Classic, a 111 km canoe race, is held annually in October or November. The race starts at Windsor and finishes at Brooklyn. The Bridge to Bridge Water Ski Classic is a water ski race that is run in the opposite direction, from Dangar Island to Windsor.[13][14] The Australian leg of the Red Bull Cliff Diving World Series takes place in Hawkesbury.

Commercial fishing[edit]

According to the Hawkesbury Nepean Catchment Management Authority, the Hawkesbury River estuary supports the second largest commercial coastal fishery of estuary prawns, oysters (prior to the outbreak of QX disease ) and fish in NSW with a wholesale value of $6.3 million annually.[15]

Cultural references[edit]

Hawkesbury River by William Piguenit (1881)

References[edit]

  1. ^ a b 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. 
  2. ^ Bear, Virginia (2010). "Aboriginal People of the Sydney Region". Australian Association of Bush Regenerators. Retrieved 27 December 2012. 
  3. ^ a b "Hawkesbury River". Geographical Names Register (GNR) of NSW. Geographical Names Board of New South Wales. Retrieved 19 December 2008. 
  4. ^ "The River System, Geographical Outline". The Sydney Morning Herald. p. 7. Retrieved 6 August 2011. 
  5. ^ "Darkinjung Recognition" (PDF). University of Sydney. Retrieved 2010. 
  6. ^ Macken, James J. Martin Burke: The Father of Pittwater. National Library of Australia. 
  7. ^ "Sackville Ferry". New South Wales Roads and Traffic Authority. Retrieved 18 November 2008. 
  8. ^ Purtell, Jean (1995). The Mosquito Fleet: Hawkesbury River Trade and Traders 1794-1994. 
  9. ^ "Hawkesbury River". National Museum of Australia. 
  10. ^ "Conflict at the Hawkesbury". National Museum of Australia. 
  11. ^ "Hawkesbury River - Windsor Tide Times". www.tide-times.com.au. Retrieved 19 December 2008. 
  12. ^ "Australia's last Riverboat Postman". Hawkesbury River Tourist Services Pty Ltd. Retrieved 19 December 2008. 
  13. ^ "Hawkesbury Canoe Classic". Hawkesbury Canoe Classic. Retrieved 2008-12-19. 
  14. ^ "Bridge to Bridge Ski Race". NSW Water Ski Federation. Retrieved 2008-12-19. 
  15. ^ "Hawkesbury River Subcatchment". Hawkesbury Nepean Catchment Management Authority. Retrieved 2007-01-05. 

External links[edit]