The Great Darling Anabranch, commonly called the Darling Anabranch, is an

anabranch An anabranch is a section of a river or stream that diverts from the main channel or stem of the watercourse and rejoins the main stem downstream. Local anabranches can be the result of small islands in the watercourse. In larger anabranches, ...

and ancestral path of the

Darling River The Darling River (or River Darling; Paakantyi: ''Baaka'' or ''Barka''), is the third-longest river in Australia, measuring from its source in northern New South Wales to its confluence with the Murray River at Wentworth. Including its long ...

in the lower Murray-Darling basin in the Far West and

Riverina The Riverina () is an agricultural list of regions in Australia, region of south-western New South Wales, Australia. The Riverina is distinguished from other Australian regions by the combination of flat plains, a climate with significant seaso ...

regions of

New South Wales New South Wales (commonly abbreviated as NSW) is a States and territories of Australia, state on the Eastern states of Australia, east coast of :Australia. It borders Queensland to the north, Victoria (state), Victoria to the south, and South ...

Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...

Course and features

The anabranch flows approximately from its offtake on the Darling River south of , southward to the

Murray River The Murray River (in South Australia: River Murray; Ngarrindjeri language, Ngarrindjeri: ''Millewa'', Yorta Yorta language, Yorta Yorta: ''Dhungala'' or ''Tongala'') is a river in Southeastern Australia. It is List of rivers of Australia, Aust ...

, west of . There are approximately twenty

ephemeral Ephemerality (from the Greek word , meaning 'lasting only one day') is the concept of things being transitory, existing only briefly. Academically, the term ephemeral constitutionally describes a diverse assortment of things and experiences, fr ...

deflation basin lakes, called the Anabranch Lakes, associated with the Darling Anabranch of which several are over in size. The Anabranch Lakes and associated marginal vegetation are listed in the

Directory of Important Wetlands in Australia A Directory of Important Wetlands in Australia (DIWA) is a list of wetlands of national importance to Australia published by the Department of Climate Change, Energy, the Environment and Water. Intended to augment the list of wetlands of internatio ...

and collectively cover an area of . The Darling Anabranch contains archaeological cultural material and evidence of Aboriginal occupation. The Darling Anabranch is a naturally ephemeral system. After the completion of the Menindee Lakes scheme in the 1960s the system was managed as a permanent water supply for stock and domestic water use for adjacent landholders. A series of 17 weir pools were replenished with an annual replenishment flow, most of which evaporated. Over the 40 years of this flow management there was a decline in the health of the system, including poor water quality, decreased numbers of native fish and a decline in aquatic vegetation. In 2007 a pipeline was constructed along the length of the Darling Anabranch to supply water to adjacent landholders. The Darling Anabranch was returned to an ephemeral system, with the removal of most structures within the channel, and the first dry phase for over four decades. Initial results from a ten-year monitoring program showed a marked ecological response to the restoration of the Darling Anabranch. Monitoring began in September 2010 at the breaking of the 'millennium drought', and detected a strong vegetation response including significant increases in riparian tree condition and in the condition of Lignum, a keystone species on the floodplains of the Murray-Darling Basin. The return of the Darling Anabranch to an ephemeral system also increased native fish diversity, and the system is thought to be crucial to maintaining the Murray-Darling Basin native fish community through provision of important habitat and food resources for juvenile life stages during times of flood.

References

External links

* * * {{Rivers of New South Wales , state=autocollapse Darling River Rivers in the Riverina Far West (New South Wales)

Course and features

See also

References

External links