The Chowilla floodplain is a

floodplain A floodplain or flood plain or bottomlands is an area of land adjacent to a river which stretches from the banks of its channel to the base of the enclosing valley walls, and which experiences flooding during periods of high discharge.Goudi ...

adjacent to the

Murray River The Murray River (in South Australia: River Murray) (Ngarrindjeri: ''Millewa'', Yorta Yorta: ''Tongala'') is a river in Southeastern Australia. It is Australia's longest river at extent. Its tributaries include five of the next six longest r ...

, upstream of Renmark,

South Australia South Australia (commonly abbreviated as SA) is a state in the southern central part of Australia. It covers some of the most arid parts of the country. With a total land area of , it is the fourth-largest of Australia's states and territories ...

. The floodplain includes the Chowilla Game Reserve and Chowilla Regional Reserve, and also extends across the state border into

New South Wales ) , nickname = , image_map = New South Wales in Australia.svg , map_caption = Location of New South Wales in AustraliaCoordinates: , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , es ...

History

Aboriginal Australians Aboriginal Australians are the various Indigenous peoples of the Australian mainland and many of its islands, such as Tasmania, Fraser Island, Hinchinbrook Island, the Tiwi Islands, and Groote Eylandt, but excluding the Torres Strait Islands ...

occupied the area before

British colonisation of South Australia British colonisation of South Australia describes the planning and establishment of the colony of South Australia by the British government, covering the period from 1829, when the idea was raised by the then-imprisoned Edward Gibbon Wakefield ...

. European

pastoralists Pastoralism is a form of animal husbandry where domesticated animals (known as "livestock") are released onto large vegetated outdoor lands (pastures) for grazing, historically by nomadic people who moved around with their herds. The animal ...

first occupied the region in the 1840s. Among the first pioneers was Fred Handcock, who overlanded livestock from New South Wales, and lost his life there in 1847. The

Chowilla Dam Chowilla Dam was a proposed water storage reservoir on the Murray River in the 1960s. The dam wall would have been in South Australia, but the reservoir behind it would have stretched upstream into Victoria and New South Wales. The site was sele ...

was proposed to be built across the floodplain in the 1960s, and if it had been built, much of the floodplain that is now protected would have been permanently flooded. After significant

drought A drought is defined as drier than normal conditions.Douville, H., K. Raghavan, J. Renwick, R.P. Allan, P.A. Arias, M. Barlow, R. Cerezo-Mota, A. Cherchi, T.Y. Gan, J. Gergis, D. Jiang, A. Khan, W. Pokam Mba, D. Rosenfeld, J. Tierney, an ...

and low water flows in the Murray River around 2009-2010, the flood plains were under significant stress due to lack of water. As a response to this, additional regulators were installed to enable artificial

flood A flood is an overflow of water ( or rarely other fluids) that submerges land that is usually dry. In the sense of "flowing water", the word may also be applied to the inflow of the tide. Floods are an area of study of the discipline hydrol ...

s across parts of the wetland to ensure the health of the trees by simulating the natural floods that would have occurred before the river was regulated by the

locks Lock(s) may refer to: Common meanings *Lock and key, a mechanical device used to secure items of importance *Lock (water navigation), a device for boats to transit between different levels of water, as in a canal Arts and entertainment * ''Lock ...

and

weir A weir or low head dam is a barrier across the width of a river that alters the flow characteristics of water and usually results in a change in the height of the river level. Weirs are also used to control the flow of water for outlets of l ...

s and upstream dams.

Ramsar wetland

The Chowilla floodplain is protected as part of the Riverland Ramsar site, designated by the

Ramsar Convention The Ramsar Convention on Wetlands of International Importance Especially as Waterfowl Habitat is an international treaty for the conservation and sustainable use of Ramsar sites (wetlands). It is also known as the Convention on Wetlands. It i ...

as a

wetland A wetland is a distinct ecosystem that is flooded or saturated by water, either permanently (for years or decades) or seasonally (for weeks or months). Flooding results in oxygen-free (anoxic) processes prevailing, especially in the soils. The ...

of international importance.

Lake Limbra project

The area includes several lakes and

areas which provide habitat for native

flora and fauna In biology, an organism () is any living system that functions as an individual entity. All organisms are composed of cells (cell theory). Organisms are classified by taxonomy into groups such as multicellular animals, plants, and fungi; ...

, but since the area has been affected by drought and the use of water from the Murray regulated, much of the plain has remained dry for long periods.

Lake Limbra A lake is an area filled with water, localized in a basin, surrounded by land, and distinct from any river or other outlet that serves to feed or drain the lake. Lakes lie on land and are not part of the ocean, although, like the much larger ...

, situated at the northern end of the Chowilla Regional Reserve, is regarded as a

sacred site Sacred space, sacred ground, sacred place, sacred temple, holy ground, or holy place refers to a location which is deemed to be sacred or hallowed. The sacredness of a natural feature may accrue through tradition or be granted through a bless ...

by the local

Aboriginal peoples Indigenous peoples are culturally distinct ethnic groups whose members are directly descended from the earliest known inhabitants of a particular geographic region and, to some extent, maintain the language and culture of those original people ...

, who used it as a

burial site Burial, also known as interment or inhumation, is a method of final disposition whereby a dead body is placed into the ground, sometimes with objects. This is usually accomplished by excavating a pit or trench, placing the deceased and objec ...

. The lake's geographical location on the eastern end of the floodplain as well as its low-lying altitude meant that in the past, it was first to be filed during flood events. In March 2021, a three-month project to pump water into Lake Limbra from the Murray River was undertaken by the state

Department for Environment and Water The Department for Environment and Water (DEW) is a department of the Government of South Australia. Created on 1 July 2012 by the merger of the Department of Environment and Natural Resources and the Department for Water as the Department of ...

SA Water SA Water is a government business enterprise wholly owned by the Government of South Australia. History SA Water was established by the proclamation of the ''South Australian Water Corporation Act 1994'' on 1 July 1995. Prior to this its predec ...

and a group of

First Nations First Nations or first peoples may refer to: * Indigenous peoples, for ethnic groups who are the earliest known inhabitants of an area. Indigenous groups *First Nations is commonly used to describe some Indigenous groups including: **First Natio ...

people, using a system of

water pump A pump is a device that moves fluids (liquids or gases), or sometimes slurries, by mechanical action, typically converted from electrical energy into hydraulic energy. Pumps can be classified into three major groups according to the method they u ...

s and cranes. By June, much wildlife was observed in and around the lake, including wetland birds such as ducks, and also shield shrimp, a tiny

crustacean Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp. The crustacean group ...

adapted to living in desert areas and was able to cope with periodic drying of muddy lakes.

References

External links

* {{coord, 34, S, 140, E, format=dms, display=title Floodplains of Australia Riverland