Term
|
Definition
| A layer of low-permeability rock that hampers ground-water movement. Often applied to the confining bed in a confined aquifer. |
|
|
Term
|
Definition
| A water-bearing body of rock or sediment that will yield water to a well or spring in usuable quantities. |
|
|
Term
| artesian-pressure surface |
|
Definition
| An imaginary surface defined by the level to which water will rise in an artesian well. |
|
|
Term
|
Definition
| The use of microbes to clean hydrocarbon residues from contaminated soils. |
|
|
Term
|
Definition
| The cone shape formed by the water table around a pumping well when pumping exceeds the flow of water to the well. |
|
|
Term
|
Definition
| A water-bearing formation bounded above and below by impermeable beds or beds of distinctly lower permeability. |
|
|
Term
|
Definition
| the lowering of the water table immediately adjacent to a pumping well. |
|
|
Term
|
Definition
| A general term for calcite or other minerals deposited in caves by dripping water. |
|
|
Term
|
Definition
| A stream that receives water from the zone of saturation. |
|
|
Term
|
Definition
| : That portion of precipitation that is returned to the air through evaporation and transpiration, the latter being the escape of water from the leaves of plants. |
|
|
Term
|
Definition
| That part of subsurface water that is in the zone of saturation (below the water table). |
|
|
Term
|
Definition
| A ground water unit expressed as the volume of water that will move in a unit of time through a unit of area measured perpendicular to the flow direction. Commonly called permeability, it expressed as the particular aquifer’s m3/day/m2 (or m/day) or ft3day/ft2 or (ft/day). |
|
|
Term
|
Definition
| A person who studies the geology and management of underground and related aspects of surface waters. |
|
|
Term
| hydrologic cycle (water cycle) |
|
Definition
| The constant circulation of water from the sea to the atmosphere, to the land, and eventually back to the sea. The cycle is driven by solar energy. |
|
|
Term
|
Definition
| A stream or reach of a stream that contributes water to the zone of saturation. |
|
|
Term
|
Definition
| Area underlain by soluble limestone or dolomite and riddled with caves, caverns, sinkholes, lakes, and disappearing streams. |
|
|
Term
|
Definition
| the upper surface of a body of ground water held up by a discontinuous impermeable layer above the static water table. |
|
|
Term
|
Definition
| The degree of ease with which fluids flow through a porous medium (see hydraulic conductivity). |
|
|
Term
|
Definition
| A material’s ability to contain fluid. The ration of the volume of pore spaces in a rock or sediment to its total volume, usually expressed as a percentage. |
|
|
Term
|
Definition
| Drinkable without ill effects |
|
|
Term
|
Definition
| The average length of time a substance (atom, ion, molecule) remains in a given reservoir. |
|
|
Term
|
Definition
| The ratio of the volume of water drained from an aquifer by gravity to the total volume considered. |
|
|
Term
|
Definition
| The study of caves and caverns |
|
|
Term
|
Definition
| Conical deposit of mineral matter, usually calcite, that has developed downward from the ceiling of a limestone cave. |
|
|
Term
|
Definition
| Conical deposit of mineral matter usually calcite, developed upward from the floor of a cavern or cave. |
|
|
Term
| sustained yield (hydrology) |
|
Definition
| The amount of water an aquifer can yield on a daily basis over a long period of time. |
|
|
Term
|
Definition
| Underground body of water that has a free (static) water table; that is, water that is not confined under pressure beneath an aquiclude. |
|
|
Term
|
Definition
| The contact between the zone of aeration and the zone of saturation. |
|
|
