| A | B |
|---|
| Groundwater | Any water found under the Earth's surface in aquifers, lakes, and rivers |
| Aquifer | Earth materials that contain groundwater and permit its flow |
| Aquitard | Earth materials that prevent the easy flow of liquids |
| Porosity | The amount of open space in a material; how big the holes are that liquids pass through |
| Permeability | The ability of water or other liquids to flow through a solid; how well the pores are connected |
| Water Table | The very top portion of the aquifer |
| Zone of Aeration | The area just above the water table and below the surface of the crust where water enters the aquifer |
| Zone of Saturation | The area where groundwater is (another name for an aquifer) |
| Zone of Discharge | An area where water leaves the aquifer and becomes surface water |
| Overdraft | Refers to a body of water that is drained faster than it is filled |
| Area Source Contamination | Contamination over a wide area |
| Point Source Contamination | Contamination from a single source |
| Linear Sampling | Sampling where data points fall in a straight line |
| Scattered Sampling | Sampling where data points are scattered randomly over an area |
| Clustered Sampling | Sampling where data points are clumped together |
| Plume | The distribution of contaminated groundwater |
