vadose zone

      region of aeration above the water table. This zone also includes the capillary fringe above the water table, the height of which will vary according to the grain size of the sediments. In coarse-grained mediums the fringe may be flat at the top and thin, whereas in finer grained material it will tend to be higher and may be very irregular along the upper surface. The vadose zone varies widely in thickness, from being absent to many hundreds of feet, depending upon several factors. These include the environment and the type of earth material present. Water within this interval, which is moving downward under the influence of gravity, is called vadose water, or gravitational water.

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Universalium. 2010.

Look at other dictionaries:

  • Vadose zone — [ capillary fringe, water table, and phreatic or saturated zone. (Source: United States Geological Survey.) ] The vadose zone, also termed the unsaturated zone, is the portion of Earth between the land surface and the phreatic zone or zone of… …   Wikipedia

  • vadose zone —    1. The zone between the land surface and the water table [22].    2. The zone between the land surface and the deepest water table which includes the capillary fringe. Generally, water in this zone is under less than atmospheric pressure, and… …   Lexicon of Cave and Karst Terminology

  • vadose cave —    1. A cave that underwent most of its development above the water table. Within the vadose zone, drainage is freeflowing under gravity, and cave passages therefore have air above any water surface. The gravitational control of vadose flow means …   Lexicon of Cave and Karst Terminology

  • vadose water —    1. That part of the underground water in a karst limestone which circulates freely under gravity above the level of saturation the vadose zone. Caves formed by flowing water are said to be vadose caves [19].    2. Water in the zone of… …   Lexicon of Cave and Karst Terminology

  • zone of aeration —    The zone in permeable soil or rock that is above the zone saturated with water; the zone of vadose water [10].    See also vadose zone …   Lexicon of Cave and Karst Terminology

  • vadose — /vay dohs/, adj. Geol. found or located above the water table: vadose water; vadose zone. [1895 1900; < L vadosus shallow, equiv. to vad(um) a shoal, ford + osus OSE1] * * * …   Universalium

  • vadose — adjective Of or pertaining to water beneath the surface of the earth which is located above the level of the permanent groundwater. Research has shown bone apatite to undergo chemical exchange with carbonates in either vadose water or groundwater …   Wiktionary

  • vadose — va•dose [[t]ˈveɪ doʊs[/t]] adj. gel found or located above the water table: vadose water; vadose zone[/ex] • Etymology: 1895–1900; < L vadōsus shallow …   From formal English to slang

  • vadose shaft —    A vertical tube in the vadose zone that may be a few inches to several feet in diameter and may be a few feet deep to hundreds and over a thousand of feet deep. They commonly occur as complexes. A drain hole is usually evident at their base.… …   Lexicon of Cave and Karst Terminology

  • vadose — [vā′dōs΄] adj. [< L vadosus, shallow < vadum, shallow place, ford, akin to vadere, to go: for IE base see WADE] designating or of water that clings to solid matter in an unsaturated zone between the earth s surface and the water table …   English World dictionary

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