An artesian well is a well that brings groundwater to the surface without pumping because it is under pressure within a body of rock and/or sediment known as an aquifer . When trapped water in an aquifer is surrounded by layers of impermeable rock or clay, which apply positive pressure to the water, it is known as an artesian aquifer . If a well were to be sunk into an artesian aquifer, water in the well-pipe would rise to a height corresponding to the point where hydrostatic equilibrium is reached.
5-511: Wallal is the location of a bore in the Kimberley region of Western Australia . The bore is located 5 kilometres (3 mi) from the Great Northern Highway between Port Hedland and Broome and has an elevation of 10 metres (33 ft). The nearest town is Marble Bar , 140 kilometres (87 mi) south of the bore. The bore falls within the boundaries of Wallal Downs Station ,
10-525: A historical pastoral lease , that operates in the area. The station also has a caravan park situated in close proximity to the bore and Eighty Mile Beach . An airstrip suitable for light planes is also located nearby. The station is the most southerly cattle station in the Kimberley. With a size of approximately 500,000 acres (200,000 ha), the Wallal Downs property stretches from the coastal flats into
15-404: Is called an artesian well . If water reaches the ground surface under the natural pressure of the aquifer, the well is termed a flowing artesian well . Fossil water aquifers can also be artesian if they are under sufficient pressure from the surrounding rocks, similar to how many newly tapped oil wells are pressurized. Not all aquifers are artesian (i.e., water table aquifers occur where
20-610: The Great Sandy Desert . Cattle reared in the area are mostly sent to market in Port Hedland or Broome and are occasionally sent to Darwin after being fattened up in the Northern Territory in lean seasons. The property is family owned and run along with Warrawagine Station. Wallal was stocked with 8,000 head of Brahman in 2015. Wallal is also of historical interest as the location of an international effort to observe
25-473: The solar eclipse on 21 September 1922 , to validate Einstein's theory of relativity . This article about a location in Western Australia is a stub . You can help Misplaced Pages by expanding it . 19°46′45.62″S 120°38′29.33″E / 19.7793389°S 120.6414806°E / -19.7793389; 120.6414806 ( Wallal ) Artesian well A well drilled into such an aquifer
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