An aquifer containing water that is not under pressure; the water level in a well is the same as the water table outside the well. Underground Injection Control (UIC): The program under the Safe Drinking Water Act that regulates the use of wells to pump fluids into the ground.
a near surface aquifer at atmospheric pressure in which the top of the aquifer is defined by the water table.
An aquifer in which water is not contained by an impermeable layer of rock or soil. The water level in the aquifer may rise or fall according to the volume of water stored, which varies according to seasonal cycles of natural recharge.
Any aquifer that does not meet the definition of a confined aquifer. An aquifer over which there is no confining strata and the water table forms the upper boundary.
An aquifer that is not overlain by an aquiclude, thereby causing the level of water in a well that penetrates the aquifer to be at the level of the surrounding groundwater table. (Compare Confined aquifer.)
An aquifer that intersects the surface of the Earth.
Unconfined Aquifer (or Water Table) - An aquifer in which the upper surface is the water table.
An aquifer whose upper boundary is defined by the water table (water is at atmospheric pressure). Water usually saturates only part of the geologic unit and there is no upper confining layer. Also called a "water table aquifer".
An aquifer with no confining geologic structure on the aquifer (aquifer pressure about the same as atmospheric pressure).
Aquifer whose upper surface is a water table free to fluctuate.
an aquifer not bound by confining material
An aquifer that is located in a permeable formation where the water table is free to rise and fall depending on factors such as the amount of rainfall.
a shallow aquifer that occurs immediately below the ground surface and has no overlying protective layer for protection from potential sources of contamination
An aquifer that has a water table.
An aquifer that does not have confining formations or layers. Compare confined aquifer, semi-confined aquifer.
an aquifer where top of the aquifer is identified by the water table. Above the water table, known as the zone of aeration, interconnected pore spaces are open to the atmosphere. Also known as a water table aquifer.
(water table aquifer) an aquifer with continuous layers of permeable soil and rock that extends from the land surface to the base of the aquifer. The water table forms the upper boundary of the aquifer.
An aquifer that has no confining layers above it and is not under pressure. The water table forms the upper boundary of the aquifer.
An aquifer that is not confined by impermeable rock above it so water recharge occurs across its entire length.
A layer of water below the surface...
The saturated formation in which the upper surface fluctuates with addition or subtraction of water. The upper surface of an unconfined aquifer is called the water table. Water, contained in an unconfined aquifer, is free to move laterally in response to differences in the water table elevations.
an aquifer in which the water table is a t or near atmosphere pressure; the aquifer may or may not be saturated to the top of the aquifer List of Glossary Terms
an aquifer in which there are no confining beds between the capillary fringe and land surface, and where the top of the saturated zone (the water table) is at atmospheric pressure.
An aquifer under ground that is permeable all the way to the surface.
An aquifer which is not bounded on top by an aquitard. The upper surface of an unconfined aquifer is the water table.
conditions in which the upper surface of the zone of saturation forms a water table under atmospheric pressure.
An aquifer which the water table as its upper boundary. Because the aquifer is not under pressure the water level in a well is the same as the water table outside the well. An unconfined aquifer is near to the earth's surface causing it to be easily recharged as well as contaminated
An aquifer that discharges and recharges with an upper surface that is the water table.
An aquifer whose upper boundary (the water table) is made up of relatively loose, unconsolidated natural material that transmits water readily; unconfined aquifers also are often referred to as water table aquifers.
An aquifer containing water that is not under pressure; the water level in a well is the same as the water table outside the well. An unconfined aquifer made up of loose material, such as sand or gravel, that has not undergone lithification (settling). In an unconfined aquifer the upper boundary is the top of the Zone of Saturation (water table).
A permeable geologic bed, only partially filled with water, that overlies a relatively impervious underground layer.
An aquifer that is not bounded by impermeable strata. It is simply the zone of saturation in water-bearing rock strata, with no impermeable overburden and recharge generally accomplished by water precolating down from above.
(Also known as water table aquifer.) Aquifer with an upper boundary defined by the water table and the surface at atmospheric pressure.
An aquifer that is not bounded above by an aquitard; water levels in wells screened in an unconfined aquifer coincide with the elevation of the water table.
Aquifer that is not restricted by impervious layers of rock.
An aquifer in which the water table serves as the upper surface of the zone of saturation.