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  2. Aquifer - Wikipedia

    en.wikipedia.org/wiki/Aquifer

    The Guarani Aquifer, located beneath the surface of Argentina, Brazil, Paraguay, and Uruguay, is one of the world's largest aquifer systems and is an important source of fresh water. [28] Named after the Guarani people , it covers 1,200,000 km 2 (460,000 sq mi), with a volume of about 40,000 km 3 (9,600 cu mi), a thickness of between 50 and 800 ...

  3. Subterranean fauna - Wikipedia

    en.wikipedia.org/wiki/Subterranean_fauna

    Subterranean fauna is found worldwide and includes representatives of many animal groups, mostly arthropods and other invertebrates.However, there is a number of vertebrates (such as cavefishes and cave salamanders), although they are less common.

  4. Groundwater - Wikipedia

    en.wikipedia.org/wiki/Groundwater

    This is an accepted version of this page This is the latest accepted revision, reviewed on 19 February 2025. Water located beneath the ground surface An illustration showing groundwater in aquifers (in blue) (1, 5 and 6) below the water table (4), and three different wells (7, 8 and 9) dug to reach it. Groundwater is the water present beneath Earth's surface in rock and soil pore spaces and in ...

  5. What is the Ogallala Aquifer and why is it running out ... - AOL

    www.aol.com/ogallala-aquifer-why-running-water...

    Kansas accounts for about 10% of the water in the Aquifer, the third most of the eight states that can access the water. The Ogallala aquifer is the principal source of water for agriculture in ...

  6. Water cycle - Wikipedia

    en.wikipedia.org/wiki/Water_cycle

    Important physical processes within the water cycle include (in alphabetical order): Advection: The movement of water through the atmosphere. [6] Without advection, water that evaporated over the oceans could not precipitate over land. Atmospheric rivers that move large volumes of water vapor over long distances are an example of advection. [7]

  7. Catchment hydrology - Wikipedia

    en.wikipedia.org/wiki/Catchment_hydrology

    The surrounding topography of a catchment zone influences the flow vectors and direction that the water flows. [1] Water flows from areas of high potential energy to low potential energy under the influence of gravity. The geometry of the slope leading to the catchment area influences the amount of water the catchment will contain. [1]

  8. Water balance - Wikipedia

    en.wikipedia.org/wiki/Water_balance

    A WRS, such as a river, an aquifer or a lake, must obey water balance. For example, the volume of water that goes into an aquifer must be equal to the amount that leaves it plus its change in storage. Under various drivers, such as, climate change, population increase, and bad management, water storage of many WRS is decreasing, say per decade ...

  9. Aquifer properties - Wikipedia

    en.wikipedia.org/wiki/Aquifer_properties

    where is void ratio, is porosity, V V is the volume of void-space (air and water), V S is the volume of solids, and V T is the total or bulk volume of medium. [1] The significance of the porosity is that it gives the idea of water storage capacity of the aquifer. Qualitatively, porosity less than 5% is considered to be small, between 5 and 20% ...

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