WebThe Ogallala Aquifer (oh-guh-LAH-lah) is a shallow water table aquifer surrounded by sand, silt, clay, and gravel located beneath the Great Plains in the United States. One of the world's largest aquifers, it underlies an area of approximately 174,000 sq mi (450,000 km 2) in portions of eight states (South Dakota, Nebraska, Wyoming, Colorado, Kansas, …

WebAn aquifer is an underground layer of water-bearing, permeable rock, rock fractures, or unconsolidated materials (gravel, sand, or silt). Groundwater from aquifers can be extracted using a water well.Aquifers vary greatly in their characteristics. The study of water flow in aquifers and the characterization of aquifers is called hydrogeology.Related terms include …

WebEen aquifer - van het Latijnse aqua en ferre: water en dragen - is een watervoerende laag in de ondergrond (bijvoorbeeld zand). Vanuit een aquifer kan water gewonnen worden via een bron.. Verwante termen zijn aquitard, een relatief slecht waterdoorlatende laag, en aquiclude (of aquifuge), eveneens een slecht waterdoorlatende laag, die boven of onder een …

WebIn the aquifer, groundwater flows from points of higher pressure to points of lower pressure, and the direction of groundwater flow typically has both a horizontal and a vertical component. The slope of the water table is known as the hydraulic gradient, which depends on the rate at which water is added to and removed from the aquifer and the ...

WebAn artesian aquifer is a confined aquifer containing groundwater under positive pressure. An artesian aquifer has trapped water, surrounded by layers of impermeable rock or clay, which apply positive pressure to the water contained within the aquifer. If a well were to be sunk into an artesian aquifer, water in the well-pipe would rise to a height corresponding …

WebOgallala is a city in and the county seat of Keith County, Nebraska, United States. The population was 4,737 at the 2010 census.In the days of the Nebraska Territory, the city was a stop on the Pony Express and later along the transcontinental railroad.The Ogallala Aquifer was named after the city.

WebAquífero Guarani é um imenso aquífero que abrange partes dos territórios do Uruguai, Argentina, Paraguai e, principalmente, Brasil, ocupando 1 200 000 km².O nome foi proposto em 1996 pelo geólogo uruguaio Danilo Anton. Na ocasião, ele chegou a ser considerado o maior do mundo: hoje, é considerado o segundo maior, capaz de abastecer a população …

WebUntil the 1980s, Saudi Arabia had lakes at Layla Aflaj and deep waterholes at 'Al-Kharj, fed by huge underground aquifers formed in prehistoric times and non-renewable. 'Al Kharj was a valuable source of drinking water in a barren terrain. In recent years, these aquifers have been drawn upon heavily, both for agricultural and domestic purposes, and no fresh …

WebC calcareous Formed from or containing a high proportion of calcium carbonate in the form of calcite or aragonite, used of a sediment, sedimentary rock, or soil type. calcite A mineral that is the crystalline form of calcium carbonate (CaCO 3), showing trigonal symmetry and a great variety of mineral habits.It is one of the commonest of minerals in association with …

WebThe Great Man-Made River (GMMR, النهر الصناعي العظيم) is a network of pipes that supplies fresh water obtained from the Nubian Sandstone Aquifer System fossil aquifer across Libya.It is the world's largest irrigation project. The project utilizes a pipeline system that pumps water from the Nubian Sandstone Aquifer System from down south in Libya to …