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The Wimmera River, an inland intermittent river of the Wimmera catchment, is located in the Grampians and Wimmera regions of the Australian state of Victoria. Rising in the Pyrenees, on the northern slopes of the Great Dividing Range, the Wimmera River flows generally north by west and drains into Lake Hindmarsh (Wergaia: Gurru)[5] and Lake Albacutya (Wergaia: Ngelbakutya),[5] a series of ephemeral lakes that, whilst they do not directly empty into a defined watercourse, form part of the Murray River catchment of the Murray-Darling basin.

Wimmera
The Wimmera River at Jeparit
Location of the Wimmera River mouth in Victoria
Native nameWalla-walla, Wamara, Bunnut, Culcatok, Barbarton, Billiwhin, Wudjum-biat, Bar, Barengi-djul, Yaigir, Wudiyedi, Barrh, Tarnorrer, Barkar, Guri-beb, Giridji-gal, Wadidirabul, Maripmunninnera[1][2][3]
Location
CountryAustralia
StateVictoria
RegionMurray Darling Depression (IBRA), Wimmera
Local government areasArarat, Northern Grampians, Yarriambiack, Horsham, Hindmarsh
TownsElmhurst, Crowlands, Glenorchy, Horsham, Dimboola, Tarranyurk, Jeparit
Physical characteristics
SourcePyrenees, Great Dividing Range
  locationbelow Ben Nevis, in a state forestry area south of Elmhurst
  coordinates37°16′29″S 143°15′00″E
  elevation299 m (981 ft)
MouthLake Hindmarsh, Lake Albacutya
  location
Outlook Creek, near Jeparit
  coordinates
36°06′42″S 141°56′51″E
  elevation
79 m (259 ft)
Length278 km (173 mi)
Basin size24,011 km2 (9,271 sq mi)
Discharge 
  average13 m3/s (460 cu ft/s)
Basin features
River systemWimmera catchment
Tributaries 
  leftMount Cole Creek, Six Mile Creek (Wimmera), Seven Mile Creek (Wimmera), Concongella Creek, Sheepwash Creek, Mount William Creek, Mackenzie River, Burnt Creek, Darragan Creek, Norton Creek
  rightGlenpatrick Creek, Glenlofty Creek, Spring Creek (Wimmera), Heifer Station Creek
National parksWyperfeld National Park, Little Desert National Park
[1][4]

Course and features


The Wimmera River rises in the Great Dividing Range below Elmhurst, between Ararat and Avoca, and flows generally north and west, through Glenorchy, Horsham, Dimboola and Jeparit, also forming the eastern boundary of the Little Desert National Park. It is joined by fourteen minor tributaries, including the Mackenzie River, before reaching its mouth at Lake Hindmarsh, near Jeparit. The river descends 220 metres (720 ft) over its 278-kilometre (173 mi) course.[4]

On the rare occasions that Lake Hindmarsh overflows, water flows via Outlet Creek (Wergaia:Krumelak)[5] to Lake Albacutya. In most years the flow of the river does not reach those terminal lakes, and the watercourse itself contracts into a series of pools.[6] On average, the lake fills once in twenty years.[7] The inflow of saline groundwater into the lower reaches of the river in recent years[when?] has severely affected its water quality, making the water more salty than sea water in several locations.

The river is crossed by the Pyrenees Highway near its source, the Henty Highway south of Horsham, and the Western Highway west of Horsham and, again, west of Dimboola.[4]

The Wimmera has a feature typical of desert drainage patterns in that it has distributaries, the Dunmunkle Creek and the Yarriambiack Creek, which divert water away from the Wimmera at times of high flow or flood.


Pipeline


The health of the Wimmera River was expected to improve following the Wimmera-Mallee pipeline project that was completed in 2008. The project involved replacing old, inefficient stock-water supply and irrigation infrastructure, with a pipeline system. Prior to the project's completion, up to 90 percent of water extracted from the Wimmera River was lost through evaporation and seepage. The Wimmera-Mallee Pipeline system was expected to be many times more efficient[citation needed] and meant that there would be much less water extracted from the Wimmera River. That was anticipated to reduce the quantities of water taken from the river and cause an increase in environmental flows in the river system.[citation needed]


Horsham flooding


Western Highway crossing the Wimmera River at Horsham.
Western Highway crossing the Wimmera River at Horsham.

The Wimmera River at Horsham has been subject to periodic flooding, with peaks recorded as follows:

Flooding events on the Wimmera River, near Horsham
Flood peakLocation(s)References
mftDate
4.71 15.5January 2011 (2011-01)[8]
3.87 12.7October 1894 (1894-10)Dunmunkle and Yarriambiack creeks. Townships of Horsham, Glenorchy, Rupanyup, Warracknabeal, Dimboola and Jeparit affected.
3.87 12.7August 1909 (1909-08)Dunmunkle and Yarriambiack creeks. Townships of Horsham, Glenorchy, Rupanyup, Warracknabeal, Dimboola and Jeparit affected.
3.73 12.2September 1916 (1916-09)Townships of Glenorchy and Horsham affected.
3.55 11.6August 1981 (1981-08)Flood affected the Wimmera River and Yarriambiack Creek.
3.49 11.5October 1996 (1996-10)
3.32 10.9September 2010 (2010-09)[9]
3.30 10.8October 1992 (1992-10)[10]

Etymology


In the indigenous Djadjawurrung and Jardwadjali languages the river is named Walla-walla, with no defined meaning; and Wamara, possibly meaning woomera or "throwing stick". In the Jardwadjali language the river is named Bunnut, with the Bernett people a clan of the Jardwadjali people; and Barbarton, with bar meaning "river" and the Barbardinbalug were a Jardwadjali clan centred on the Wimmera River. In the Djadjawurrung language the river is named Culcatok, with no defined meaning. In the Djabwurrung, Jardwadjali, and Wergaia languages, the river is named Billiwhin, with no defined meaning. In the Wergaia language the river has several names including Wudjum-bial, with bial meaning red gum; Barengi-djul, with bareng meaning "river" and djul meaning waterbags; Yaigir, with no defined meaning; Wudiyedi, with no defined meaning; Guri-beb, with beb meaning white gum; Giridji-gal, with a meaning that "a dog was always there"; Wadidirabul, with no defined meaning. In the Djabwurrung language the river has several names including Bar and Barkar, with bar meaning "river"; and Tarnorrer and Maripmunninnera, both with no defined meaning. In an undefined local indigenous language, the river is named Barrh', with no defined meaning.[1][2][3]

The colonial name of the river is derived from the name of the pastoral run. Gold was discovered in the river in 1866.[11]


See also



References


  1. "Wimmera River (entry 622167)". VICNAMES. Government of Victoria. Retrieved 23 October 2014.
  2. Smyth, Robert Brough (1878). The Aborigines of Victoria. Melbourne: Victorian Government Printer. p. 176. OL 23539869M.
  3. Clark, Ian; Heydon, Toby (2011). "Wimmera River: Traditional Names". Victorian Aboriginal Corporation for Languages.
  4. "Map of Wimmera River, VIC". Bonzle Digital Atlas of Australia. Retrieved 23 October 2014.
  5. Griffin, Darren; Muir, Ben. "Barringgi Gadyin – The Wimmera River and Wotjobaluk Connection to Country" (PDF). biolinksalliance.org.au. Retrieved 17 October 2021.
  6. Ker, Peter (25 January 2011). "Parched lake may end 15-year dry". The Age. Retrieved 15 February 2019.
  7. "Lake Albacutya Park". Parks Victoria. Retrieved 15 February 2019.
  8. "Floodwaters affecting the North West". The Age. Melbourne. 18 January 2011.
  9. "Flood Update" (streaming audio). ABC Radio. Horsham, Victoria, Australia. 9 September 2010.
  10. "Horsham Floods". Wimmera Catchment Management Authority. Victorian Government.
  11. Sinnott, Nigel. Place-Names of the Alexandra, Lake Eildon and Big River Area of Victoria. Alexandra: Friends of the Alexandra Library.





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