Awesome Aquifers Vocab
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Created by:
emilymcdevitt on November 20, 2010
Subjects:
Classes:
Urbana Middle School - Science Olympiad, Science Olympiad 2011-12
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15 terms
Terms | Definitions |
|---|---|
Aeration Zone | The zone immediately below the land surface where the pores contain both water and air, but are not totally saturated with water. Plant roots can capture the moisture passing through this zone, but it cannot provide water for wells. Also known as the unsaturated zone. |
Aquifer | underground bed or layer yielding ground water for wells and springs etc |
Cone of Depression | The zone around a well in an unconfined aquifer that is normally saturated, but becomes unsaturated as a well is pumped, leaving an area where the water table dips down to form a cone shape. The shape of the cone is influenced by porosity and the water yield or pumping rate of the well. |
Confining Layer | Geologic material with little or no permeability or hydraulic conductivity. Water does not pass through this layer or the rate of movement is extremely slow. |
Depletion | The loss of water from surface water reservoirs or groundwater aquifers at a rate greater than that of recharge. |
Discharge | an outflow of water from stream, pipe, groundwater aquifer, or watershed; the opposite of recharge |
Drawdown | a lowering of the groundwater level caused by pumping |
Flow Rate | the time required for a volume of groundwater to move between points. Typically groundwater moves very slowly- sometimes only inches per year |
Groundwater | water found in the spaces between soil particles and cracks in rock underground( located in the saturated zone). Groundwater is a natural resource that is used for drinking, recreation, industry, and growing crops. |
Hydrological Cycle( also known as the water cycle) | the paths water take through its various states-vapor, liquid, solid- as it moves throughout the oceans, atmosphere, groundwater, streams, etc... |
Impermeable Layer | A layer of material (such as clay) in an aquifer through which water does not pass. |
Infiltration | flow of water from the land surface into the subsurface. |
Infiltration Rate | the quantity of water that enters the soil surface in a specified time interval, often expressed in volume of water per unit of soil surface area per unit of time. |
Monitoring Well | a non-pumping well, generally of small diameter, that is used to measure the elevation of a water table or water quality. |
Overwithdrawl | withdrawl of groundwater over a period of time that exceeds the recharge rate of the supply aquifer. Also, referred to as overdraft or mining the aquifer. |
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