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| any geological formation containing or conducting ground water, esp. one that supplies the water for wells, springs, etc. |
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artesian formation [image] |
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| water is traped between layers |
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evapotranspiration [image] |
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| the process of transferring moisture from the earth to the atmosphere by evaporation of water and transpiration from plants. |
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| A natural hot spring that intermittently ejects a column of water and steam into the air. |
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| the water on or surrounding the surface of the globe, including the water of the oceans and the water in the atmosphere |
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| not permeable; impassable. |
| 2. | Chemistry, Geology. (of porous substances, rocks, etc.) not permitting the passage of a fluid through the pores, interstices, etc. |
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| the property or state of being permeable. |
| 2. | Also called magnetic permeability. Electricity. a measure of the change in magnetic induction produced when a magnetic material replaces air, expressed as a coefficient or a set of coefficients that multiply the components of magnetic intensity to give the components of magnetic induction. |
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| the state or quality of being porous. |
| 2. | Geology, Engineering. the ratio, expressed as a percentage, of the volume of the pores or interstices of a substance, as a rock or rock stratum, to the total volume of the mass. |
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| to charge again with electricity. |
| 2. | Informal. to refresh or restore; revitalize. |
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| something that remains above what is used or needed. |
| 2. | an amount, quantity, etc., greater than needed. |
| 3. | agricultural produce or a quantity of food grown by a nation or area in excess of its needs, esp. such a quantity of food purchased and stored by a governmental program of guaranteeing farmers a specific price for certain crops. |
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| the planar, underground surface beneath which earth materials, as soil or rock, are saturated with water. |
| 2. | Architecture. a projecting stringcourse or similar structural member placed so as to divert rain water from a building. |
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| (formerly) a leather bag suspended at each end of a pole or yoke and used for carrying water. |
| 2. | Also, water budget. Heraldry. a representation of a pair of these joined by a yoke, used as a charge. |
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| The cycle of evaporation and condensation that controls the distribution of the earth's water as it evaporates from bodies of water, condenses, precipitates, and returns to those bodies of water. Also called hydrologic cycle. |
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