
Australia is a relatively dry country, and its rivers are essential sources of fresh water. The sustainability of these waterways is of utmost importance. The Murray River, stretching 2,508 kilometres from the Australian Alps to the Southern Ocean, is the longest river in the country. It is also the longest river in the states of South Australia and New South Wales. The Darling River, a tributary of the Murray, is often considered separately and, if its major tributaries are included, its total length reaches 2,740 kilometres, making it the longest waterway in Australia. The Gascoyne River is the longest river in Western Australia, the Victoria River in the Northern Territory, and the South Esk River in Tasmania.
| Characteristics | Values |
|---|---|
| Longest River in New South Wales | Murray River |
| Length | 2,375 km (1,476 miles) |
| States Covered | New South Wales, Victoria, South Australia |
| Longest River in Victoria | Murray River |
| Longest River in Queensland | Murray River |
| Longest River in South Australia | Murray River |
| Longest River in Western Australia | Swan River |
| Length | 72 km (45 miles) |
| States Covered | Western Australia |
| Longest River in Tasmania | South Esk River |
| Length | 251 km (156 miles) |
| States Covered | Tasmania |
| Longest River in Northern Territory | South Alligator River |
| Length | 320 km (199 miles) |
| States Covered | Northern Territory |
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What You'll Learn

The longest river in Western Australia
The Gascoyne River is the longest river in Western Australia. It is located in the Gascoyne region of Western Australia and stretches for 537 miles (865 kilometres), although one source places it at 518.2 miles. The Gascoyne River comprises three branches in its upper reaches. The North Branch rises near the Great Northern Highway and flows for approximately 78 miles. The Middle Branch rises west of Beyondie Lakes and flows for approximately 9.3 miles. The South Branch rises near the Doolgunna homestead and flows for approximately 9.3 miles. The Gascoyne is joined by 36 tributaries, including the Lyons River, Landor River, and Thomas River. It flows generally in a west by southwest direction into Shark Bay and the Indian Ocean at Carnarvon.
The Gascoyne River was first seen by Europeans on 4 March 1839, during an expedition led by Lieutenant George Grey, who named the river after his friend, Captain John Gascoyne. The river is said to be an "upside-down river" because it only flows above ground for about 120 days of the year and runs underground for the remainder. This makes it a huge water storage system with the river aquifer lying below the desert sands. The river is used for irrigation, drinking water, sheep rearing, and gold mining.
The Gascoyne River experienced severe flooding in December 2010, caused by record-breaking rainfall. This resulted in widespread damage, including the loss of approximately two thousand head of cattle and an estimated financial impact of A$100 million.
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Victoria River in Northern Territory
The Victoria River is located in the Northern Territory of Australia, in the bioregion of Victoria Bonaparte. It is the longest singularly named permanent river in the Northern Territory, flowing for 560 kilometres (350 miles) from its source south of the Judbarra/Gregory National Park. The river was discovered by Europeans in 1839 when Captain J.C. Wickham of the HMS Beagle reached its source and named it after Queen Victoria, who had been crowned two years prior. The river flows north-west through a region of hills and basins, cutting through the ranges to form rugged cliffs and escarpments. It enters the Joseph Bonaparte Gulf of the Timor Sea via a 16-mile-wide mouth at Queens Channel.
The Victoria River has 56 tributaries, including the West Baines, Wickham, Gordon, Armstrong, Camfield, and other rivers and creeks. Its waters and those of its tributaries are used for agriculture and grazing, and it flows through several large cattle stations, including Riveren, Victoria River Downs, Coolibah Station, and Wave Hill Station. The river's wetlands are ecologically significant, providing important habitats for migratory birds and waterfowl breeding colonies.
The area surrounding the Victoria River features dramatic landscapes and offers a range of walking tracks and lookouts, such as the Nawulbinbin Walk, which takes visitors through Livistona palm trees and local Aboriginal rock art sites. The river also holds historical significance, with the Wave Hill Station being known for the historic strike by the Gurindji Aborigines in the 1960s and 1970s.
The Victoria River is an important natural landmark in the Northern Territory, offering ecological, recreational, and cultural value to the region. Its discovery by Europeans and subsequent naming after Queen Victoria add to its historical significance.
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South Esk River in Tasmania
The South Esk River, the longest river in Tasmania, is a major perennial river located in the northern region of Tasmania, Australia. The river is known as plipatumila in the language of the Tasmanian Aboriginal people, palawa kani. The South Esk springs from the eastern foothills of the Ben Lomond plateau near Mathinna, and its course describes an arc around the entire southern promontory of the mountain. It runs through Fingal, Avoca, and Evandale before winding its way northwest through Perth, Longford, and Hadspen. The river merges with the tributary Meander River, then flows through the narrows of the Cataract Gorge to finally meet the North Esk River at Launceston. From this confluence arises the Tamar River, which runs to the Bass Strait.
The river is a vital resource for northern Tasmania, providing water and electricity, as well as a pathway to the sea for migratory species. The natural river flow is interrupted by the Trevallyn Dam, which was constructed as part of the Trevallyn Power Station hydroelectric power scheme. The river is subject to flooding, which overflows at Lake Trevallyn to create the spectacle of high rapids coursing through the narrows of the Gorge. The South Esk is also a popular destination for fishing, with species such as salmon, and it is used for irrigation, livestock rearing, water supply, and recreation.
The South Esk River runs through and forms the borders of the traditional lands of two nations of the Palawa: the Ben Lomond Nation and the North Midlands Nation. The Aboriginal clans exploited the hunting grounds alongside the river and took the native freshwater mussel for food.
The river offers opportunities for shore-based and wade angling, as well as canoeing, kayaking, and boating. However, recreational anglers and visitors are advised to check their equipment and boats for pests and weeds before entering Tasmanian waters to protect the ecosystem.
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Murrumbidgee River, a tributary of the Murray
The Murrumbidgee River is one of the most significant tributaries of the Murray River, the longest river in Australia. Originating in the Australian Capital Territory, the Murrumbidgee flows through New South Wales for over 1,600 kilometres before joining the Murray. This tributary plays a vital role in the ecosystem and economy of the regions it traverses.
The Murrumbidgee rises on the western slopes of the Great Dividing Range, benefiting from the runoff from this vast mountainous area. Its source is located near the town of Canberra, where it is fed by numerous small streams and creeks. From its source, the river flows westward, cutting through a picturesque landscape of rugged mountains and fertile valleys.
As it winds its way through southeastern Australia, the Murrumbidgee forms a vital lifeline for the region's agriculture and ecosystems. Its waters irrigate countless farms and support a diverse range of plant and animal life. The river is home to several unique species, including the Murrumbidgee catfish, and provides an important habitat for waterbirds and other wildlife.
The river's journey is not without its challenges. Along its course, the Murrumbidgee has carved out spectacular gorges and waterfalls, including the famous Murrumbidgee Falls. These natural features not only provide breathtaking scenery but also present obstacles that have shaped human settlement and development in the region.
The Murrumbidgee River has been an important source of water for irrigation in the Murray-Darling Basin for many years. Its waters support a variety of crops, including wheat, barley, and grapes, as well as livestock farming. Several towns and cities have sprung up along its banks, their economies closely tied to the river's health and the resources it provides.
In conclusion, the Murrumbidgee River is a vital tributary of the Murray, contributing significantly to the length, volume, and ecological diversity of its parent river. Its course through southeastern Australia has shaped the region's geography, supported its agriculture, and provided a home for unique flora and fauna. The Murrumbidgee serves as a reminder of the integral role that rivers play in sustaining life and shaping the landscape of Australia.
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The Darling River and its tributaries
The Darling River, also known as River Darling, Paakantyi: Baaka or Barka, is the third-longest river in Australia. It covers a distance of about 1,472 kilometres (915 miles) from its source in northern New South Wales to its confluence with the Murray River at Wentworth. The Darling River is formed by several headstreams that originate from the Great Dividing Range, near the New South Wales-Queensland border. The streams feed two main rivers, the Barwon and Culgoa, which converge at Brewarrina and Bourke in northern New South Wales to form the Darling River.
The Darling River has played a significant role in the history and development of the region. Aboriginal peoples, specifically the Barkindji people, have inhabited the riverbanks for thousands of years. In the 19th century, the river became a major transportation route for pastoralists in western New South Wales, who used paddle steamers to transport wool. However, with the advent of railways, the river's significance as a transportation route gradually declined.
The health of the Darling River has been a cause for concern in recent years. The river has suffered from over-allocation of its waters for irrigation, pollution from pesticide runoff, and prolonged droughts. These issues have led to decreased water quality and, in some cases, a complete cessation of flow during drought periods. The river's health is dependent on long-term management strategies to ensure its sustainability.
The major tributaries of the Darling River include the Culgoa, Balonne, Condamine, Namoi, Castlereagh, Macquarie, and Bogan rivers. These tributaries play a crucial role in shaping the river system and providing water resources for the region.
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