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APESCH17
| Term | Definition |
|---|---|
| Aquifers | porous, water-bearing layers of sand, gravel, and rock below the earth's surface; reservoirs for groundwater |
| Artesian well | the result of a pressurized aquifer intersecting the surface or being penetrated by a pipe or conduit, from which water gushes without being pumped; also called a spring |
| Condensation | the aggregation of water molecules from vapor to liquid or solid when the saturation concentration is exceeded |
| Condensation Nuclei | |
| Consumption | the fraction of withdrawn water that is lost in transmission or that is evaporated, absorbed, chemically transformed, or otherwise made unavailable for other purposes as a result of human use |
| Degraded | deteriration in water quality due to contamination or pollution; makes water nsuitable for other desirable purposes |
| Desalination | removal of salt from water by distillation, freezing, or ultrafiltration |
| Dew point | the temp at which condensation occurs for a given concentration of water vapor in the air |
| Discharge | the amount of water that passes a fixed point in a given amount of time; usually expressed as liters or cubic feet of water per second |
| Evaporation | when st turns to vapor from liquid because of heat |
| Groundwater | water held in gravel deposits or posrous rock below the earth's surface; does not include water or crystallization held by chemical bonds in rocks or moisture in upper soil layers |
| Infiltration | the process of water percolation into the soil and pores and hollows of permeable rocks |
| Rain Shadow | dry area on the downwind side of a mountain |
| Recharge Zones | area where water infiltrates into an aquifer |
| Relative Humidity | |
| Renewable Water Supplies | wannual freshwater surface runoff plus annual infiltration into underground freshwater aquifers that are accessible for human use |
| Residence Time | the length of time a component, such as an individual water molecule, spends in a particular compartment or location before it moves on through a particular process or cycle |
| Saltwater Intrusion | movement of saltwater into freshwater aquifers in coastal areas where groundwater is withdrawn faster than it is replenished |
| Saturation Point | |
| Sinkholes | a large surface crater caused by the collapse of an underground channel or cavern; often triggered by groundwater withdrawal |
| Sublimation | |
| Subsidence | a settling of the ground surface caused by the collapse of porous formations that reslt from withdrawal of large amounts of groundwater, oil, or other undergound materials |
| Transpiration | |
| Water Scarcity | annual available freshwater supplies less than 1000 m^3 per person |
| Water Stress | a situation when residents of a country don't have enough accessible, high-quality water to meet their everyday needs |
| Water Table | the top layer of the zone of saturation; undulates according to the surface topography and subsurface structure |
| Withdrawal | a description of the total amount of water taken from a lake, river, or aquifer |
| Zone of Aeration | upper soil layers that hold both air and water |
| Zone of Saturation | lower soil layers where all spaces are filled with water |
Created by:
AlanaR
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