Diamantina | |
---|---|
Etymology | Lady Diamantina Bowen [1] |
Location | |
Country | Australia |
State | Queensland, South Australia |
Region | Channel Country |
Physical characteristics | |
Source | Swords Range |
• location | west of Winton, South West, Queensland |
• elevation | 313 m (1,027 ft) |
Mouth | Warburton River |
• location | confluence with the Eyre Creek, Far North, South Australia |
• elevation | 20 m (66 ft) |
Length | 900 km (560 mi) |
Basin size | 157,000 km2 (61,000 sq mi) |
Basin features | |
River system | Lake Eyre basin |
Tributaries | |
• left | Western River, Mayne River |
National park | Diamantina National Park |
[2] |
The Diamantina River is a major river in Central West Queensland and the far north of South Australia.
The river was named by William Landsborough in 1866 for Lady Diamantina Bowen (née Roma), wife of Sir George Bowen, the first Governor of Queensland. [1] It has three major tributaries the Western River, Mayne River and Farrars Creek. [3]
Rising north-west of Longreach in the Swords Range in Queensland, the river flows in a south-westerly direction through central Queensland and the Channel Country to form the Warburton River at its confluence with the Georgina River. [4] [5] In extremely wet years, the Warburton River flows as far as Lake Eyre. [6] The length of the Diamantina River is approximately 900 km (560 mi), and the basin is approximately 157,000 square kilometres (61,000 sq mi), [7] of which 140,000 square kilometres (54,000 sq mi) are used for agriculture.
Most of the basin of the Diamantina is very flat—even the highest points in the northeast do not reach 500 m (1,600 ft) above sea level and Lake Eyre itself is 16 m (52 ft) below sea level. Apart from a few streams near Winton (the largest town in the basin) almost all rivers in the basin flow southwestwards towards Birdsville. The Diamantina River has no main channel, rather it is a series of wide and relatively shallow channels. [3] The major feature of the river's sluggish course is Diamantina National Park about halfway between Winton and Birdsville. Apart from the national park, almost all land in the basin is used for grazing cattle and sheep, though numbers fluctuate greatly and considerable skill is required on the part of graziers.
The variable drought and flood cycles of the area make the river ephemeral with many semi-permanent waterholes. The highest recorded flow rate of the river was at Birdsville in 1974 with 4,700 cubic metres per second (170,000 cu ft/s) was measured. [8]
The Diamantina runs along the northern and eastern rim of a roughly circular zone measuring some 130 km across that has been identified by Geoscience Australia as a crustal anomaly. Proof is currently lacking as to the cause, but it is believed likely that the anomaly was caused by an asteroid strike that happened about 300 million years ago. [9]
The climate of the basin is hot and arid. In January, temperatures throughout the basin average around 37 °C (99 °F) during the day and decline only to about 24 °C (75 °F) at night. In winter, they typically range from 25 °C (77 °F) during the day to 11 °C (52 °F) at night. On occasions, however, frost has been reported in all areas of the basin: Winton has recorded minima as low as −1.8 °C (28.8 °F).
Rainfall is heavily concentrated between December and March: averages for these four months range from 310 mm (12 in) at Winton and Kynuna to around 90 mm (3.5 in) at Birdsville. In the rest of the year rainfall is very scanty and only on the rarest occasions are significant falls reported: throughout most of the basin the average rainfall between May and September totals around 40 mm (1.6 in). However, the rainfall of the basin, as with all of the Lake Eyre Basin, is exceedingly erratic and catastrophic droughts and floods tend to be the normal state of affairs throughout this region. In the northern part of the basin, annual rainfalls as high as 1,100 mm (43 in) were reported in 1894, 1950, 1974 and 2000, whilst even in Birdsville annual totals as high as 550 mm (22 in) have been reported. During floods the river can be as wide as 30 km (19 mi) across. [10]
In dry years such as 1902, 1905, 1928, 1961, 1965 and 2002, almost the whole basin reported totals 100 mm (3.9 in). There can also be significant variation from station to station over small areas: although the annual averages and variability at Winton and Kynuna are almost alike, the actual totals at the two stations can differ by as much as 200 mm (7.9 in) in some years due to isolated very heavy rainfalls.
The soils in the region are mainly grey and brown vertisols, with some fluvents in the drier areas. Although they do not have high phosphate contents, they have adequate levels of most other nutrients: consequently when rainfall is abundant the grasses within the basin are extremely nutritious, especially in the lower reaches of the river around Birdsville, which is a primary region for cattle fattening in years when rainfall further north is adequate to flood the region.
The 3,400-square-kilometre (1,300 sq mi) floodplain of the lower reaches of the Diamantina has been identified as an Important Bird Area by BirdLife International because it has been estimated to support at least 450,000 waterbirds when in flood, as well as globally significant numbers of the nankeen night-heron, royal spoonbill, little curlew, Australian bustard, grey grasswren, inland dotterel, cinnamon quail-thrush and pied honeyeater. [11]
The river is ephemeral but floods periodically following heavy rainfall events in the catchment. During the floods of 1940 the mailman, Harry Ding, completed his round using a motorboat and Cooper Creek was measured at around 43 kilometres (27 mi) wide. [12] In 1950 flooding covered some 7,770 square kilometres (3,000 sq mi), with the river described as a raging torrent 48 kilometres (30 mi) wide. [13]
Karuwali (also known as Garuwali, Dieri) is a language of far western Queensland. The Karuwali language region includes the landscape within the local government boundaries of the Diamantina Shire Council, including the localities of Betoota and Haddon Corner. [14]
Lake Eyre, officially known as Kati Thanda–Lake Eyre, is an endorheic lake in the east-central part of the Far North region of South Australia, some 700 km (435 mi) north of Adelaide. The shallow lake is the depocentre of the vast endorheic Lake Eyre basin, and contains the lowest natural point in Australia, at approximately 15 m (49 ft) below sea level. On the rare occasions that it fills completely, it is the largest lake in Australia, covering an area of up to 9,500 km2 (3,668 sq mi). When the lake is full, it has the same salinity as seawater, but becomes hypersaline as the lake dries up and the water evaporates.
The Simpson Desert is a large area of dry, red sandy plain and dunes in the Northern Territory, South Australia and Queensland in central Australia. It is the fourth-largest Australian desert, with an area of 176,500 km2 (68,100 sq mi).
Birdsville is a rural town and locality in the Shire of Diamantina, Queensland, Australia. It is situated 10 kilometres (6 mi) north of the border of South Australia and Queensland. In the 2021 census, the locality of Birdsville had a population of 110 people. It is a popular tourist destination with many people using it as a starting point across the Simpson Desert.
The Lake Eyre basin is a drainage basin that covers just under one-sixth of all Australia. It is the largest endorheic basin in Australia and amongst the largest in the world, covering about 1,200,000 square kilometres (463,323 sq mi), including much of inland Queensland, large portions of South Australia and the Northern Territory, and a part of western New South Wales. The basin is also one of the largest, least-developed arid zone basins with a high degree of variability anywhere. It supports only about 60,000 people and has no major irrigation, diversions or flood-plain developments. Low density grazing that sustains a large amount of wildlife is the major land use, occupying 82% of the total land within the basin. The Lake Eyre basin of precipitation to a great extent geographically overlaps the Great Artesian Basin underneath.
The Cooper Creek is a river in the Australian states of Queensland and South Australia. It was the site of the death of the explorers Burke and Wills in 1861. It is sometimes known as the Barcoo River from one of its tributaries and is one of three major Queensland river systems that flow into the Lake Eyre basin. The flow of the creek depends on monsoonal rains falling months earlier and many hundreds of kilometres away in eastern Queensland. It is 1,300 kilometres (810 mi) in length.
The Channel Country is a region of outback Australia mostly in the state of Queensland but also in parts of South Australia, Northern Territory and New South Wales. The name comes from the numerous intertwined rivulets that cross the region, which cover 150,000 km². The Channel Country is over the Cooper and Eromanga geological basins and the Lake Eyre Basin drainage basin. Further to the east is the less arid Maranoa district.
The Georgina River is the north-westernmost of the three major rivers of the Channel Country in Central West Queensland, that also flows through a portion of the Northern Territory, in central Australia. Part of the Lake Eyre basin, the Georgina flows in extremely wet years into Lake Eyre.
The Shire of Diamantina is a local government area in Central West Queensland, bordering South Australia and the Northern Territory. Its administrative centre is in the town of Bedourie.
The Bulloo RiverBUUL-oo is an isolated drainage system in western Queensland, central Australia. Its floodplain, which extends into northern New South Wales, is an important area for waterbirds when inundated. It comprises most of the Bulloo-Bancannia drainage basin.
The Tirari Desert is a 15,250 square kilometres (5,888 sq mi) desert in the eastern part of the Far North region of South Australia. It stretches 212 km from north to south and 153 km from east to west.
The Goyder Lagoon is a large ephemeral swamp in the Australian state of South Australia in the state's Far North region. The lake is part of the Diamantina River floodplain, lying beside the Birdsville Track close to the state border with Queensland.
Macumba River, once known as Treuer River, is an ephemeral freshwater stream in the far north of South Australia, that is part of the Lake Eyre Basin.
Glengyle Station is a pastoral lease that operates as a cattle station in central west Queensland.
Cowarie Station most commonly known as Cowarie is a pastoral lease that operates as a cattle station in north east South Australia.
Durrie Station is a pastoral lease that operates as a cattle station in Queensland, Australia.
Morney Plains Station, most commonly referred to as Morney Plains, is a pastoral lease that operates as a cattle station in south west Queensland.
Amaroo is an outback locality split between the Shire of Boulia and the Shire of Diamantina, both in Central Western Queensland, Australia. In the 2016 census, Amaroo had a population of 22 people.
Farrars Creek is a rural locality in the Shire of Barcoo, Queensland, Australia. In the 2016 census, Farrars Creek had a population of 2 people.