WATER TERMS
| term | description |
|---|---|
| GEOHYDROLOGY | A term which denotes the branch of hydrology relating to subsurface or subterranean waters; that is, to all waters below the surface. |
| GEOLOGIC EROSION | Normal or natural erosioncaused by geological processes acting over long geologic periods and resulting in the wearing away of mountains, the building up of flood plains, coastal plains, etc. |
| GEOLOGY | The science dealing with the general study of the earth. |
| GEOTHERMAL ENERGY | The heat energy available in the earth's subsurface, extracted from three basic sources; (1) steam; (2) hot water; and (3) hot rocks or near surface intrusions of volcanic molten rock. The normal thermal gradient of the earth's crust is such that the temperature in a deep well or mine increased by about 1 ¡F for each 100 feet of depth. |
| GEYSER | A periodic thermal spring that results from the expansive force of super heated steam. |
| GLACIER | A huge mass of land ice that consists of recrystallized snow and moves slowly downslope or outward. |
| GLOBAL POSITIONING SYSTEM | A system which verifies latitude and longitude of a location on the ground through the use of a transmitter and a remote (satellite) vehicle. |
| GRASSED WATERWAY | A natural or constructed waterway, usually broad and shallow and covered with erosion-resistant grasses, used to conduct surface water from cropland. |
| GRAYWATER | Water that has been used for showering, clothes washing, and faucet uses. Kitchen sink and toilet water is excluded. This water has excellent potential to be reused as irrigation for yards. |
| GROUND WATER | The supply of fresh water found beneath the Earth's surface (usually in aquifers) which is often used for supplying wells and springs. Because ground water is a major source of drinking water, there is growing concern over areas where leaching agricultural or industrial pollutants or substances from leaking underground storage tanks are contaminating ground water. |
| GROUND WATER LAW | The common law doctrine of riparian rights and the doctrine of prior appropriation as applied to ground water. |
| GROUND WATER RECHARGE | The inflow to a ground water reservoir. |
| GROUND WATER REGISTRATION | A statement made by a well owner registering the beneficial use of ground water. |
| GROUND WATER RESERVOIR | An aquifer or aquifer system in which ground water is stored. The water may be placed in the aquifer by artificial or natural means. |
| GROUND WATER RUNOFF | A portion of runoff which has passed into the ground, has become ground water, and has been discharged into a stream channel as spring or seepage water. |
| GROUND WATER STORAGE | The storage of water in ground water reservoirs. |
| GULLY | A deeply eroded channel caused by the concentrated flow of water. |
| GULLY EROSION | The development of relatively deep, steep-sided channels from small rills and water courses that have not been eradicated with tillage and have become too deep to permit normal farming operations. |
| GYPSUM/CELLULOSE | An interior wallboard product that uses cellulose from recycled newspapers with gypsum and perlite. |
| GAGING STATION | The site on a stream, lake or canal where hydrologic data is collected. |
| GALLON | A unit of volume. A U.S. gallon contains 231 cu. in., 0.133 cubic feet, or 3.785 liters. One U.S. gallon of water weighs 8.3 lbs. |
| GAS | A state of matter; a substance that generally exists in the gaseous phase at room temperature. |
| GENERATOR | A machine that changes water power, steam power, or other kinds of mechanical energy into electricity. |
| GEOGRAPHIC INFORMATION SYSTEM | A map based database. Plots locations of information on maps using latitude and longitude. |
| GEOPRESSURED RESERVOIR | A geothermal reservoir consisting of porous sands containing water or brine at high temperature or pressure. |
| GROUND WATER HYDROLOGY | The branch of hydrology that deals with ground water; its occurrence and movements, its replenishment and depletion, the properties of rocks that control ground water movement and storage, and the methods of investigation and utilization of ground water. |
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