Impermeable: Material that does not permit fluids to pass through.
Impervious: The quality or state of being impermeable; resisting penetration by water or plant roots.
Impermeable: Not easily penetrated. The property of a material or soil that does not allow, or allows only with great difficulty, the movement or passage of water.
impermeable
Of a membrane, not allowing a given substance to pass through. When applied to nonbiological membranes with no qualification, the term normally refers to water.
Impermeable: Characteristic of geologic materials that limit their ability to transmit significant quantities of water under the head differences normally found in the subsurface environment.
Impermeable layer: A layer of material (such as clay) in an aquifer through which water does not pass.
Impermeable Not easily penetrated by water.
Impurities Particles or other objects that cause water to be unclear.
Impermeable: A material which does not easily transmit a fluid. It is often defined arbitrarily and in relation to more permeable materials present in the same area. For example, a shale may be impermeable relative to a nearby sandstone.
An impermeable diaphragm, usually of sheet metal or concrete, constructed at intervals within the zone of saturation along the conduit of a principal spillway to increase the seepage length along the conduit and thereby prevent piping or seepage ...
impermeable pertaining to a substance that does not allow fluids to penetrate
interglacial a period of relative warmth worldwide when continental glaciers melt back to extreme northern latitudes ...
impermeable Describes material or soil that does not allow, or allows only with great difficulty, the movement or passage of water. Compare permeable. imported water Water brought into an area from a distant source.
1. A relatively impermeable barrier designed to keep leachate inside a landfill. Liner materials include plastic and dense clay. 2. An insert or sleeve for sewer pipes to prevent leakage or infiltration.
Lipid Solubility ...
Seed coat dormancy results from a seed coat that is impermeable to water or oxygen, such as the locust seed coat. Embryo dormancy usually involves an immature embryo that requires afterripening, as is the case with maple seed.
Water Table The level of ground water or the upper surface of the zone of saturation of groundwater above an impermeable layer of soil or rock (through which water cannot move) as in an unconfined aquifer.
Runoff is often considered to be the water flowing over either impermeable or saturated surfaces. This is the most common observed runoff and is called Horton Overland Runoff.
cap 1) A layer of clay or other impermeable material installed over the top of a closed landfill to prevent entry of rainwater and minimize leachate. 2) A layer of relatively warm air aloft (usually several thousand feet above the ground) ...
A water table due to the ""perching"" of water on a relatively impermeable layer at some depth within the soil. The soil within or below the impermeable layer is not saturated with water.
percolation (of soil water) ...
liner 1) A relatively impermeable barrier designed to prevent leaching from a volume of contained wastes or polluted liquid. 2) An insert or sleeve for sewer pipes to prevent leakage or infiltration.
Groundwater: Water that sinks into the ground and collects over impermeable rock. It then flows laterally toward a stream, lake, or ocean. Wells tap it for our use. Its surface is called the Òwater tableÓ.
Confined aquifer. A water-bearing subsurface stratum that is bounded above and below by formations of impermeable, or relatively impermeable soil or rock.
Water held under pressure in porous rock or soil confined by impermeable geological formations.
Source: Terms of the Environment
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An aquifer acts as a groundwater reservoir when the underlying rock is impermeable. This may be tapped by wells for domestic, agricultural or industrial use.
 See also: Water, Soil, Environment, Permeable, Air
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