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groundwater |
Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson | 0.04 sec. |
groundwateror subsurface waterWater that occurs below the surface of the Earth, where it occupies spaces in soils or geologic strata. Most groundwater comes from precipitation, which gradually percolates into the Earth. Typically, 10–20% of precipitation eventually enters aquifers. Most groundwater is free of pathogenic organisms, and purification for domestic or industrial use is not necessary. Furthermore, groundwater supplies are not seriously affected by short droughts and are available in many areas that do not have dependable surface water supplies. |
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Study coauthor Frank yon Hippel notes that much of the nation's water supply comes from groundwater and says that "groundwater flows just like surface water and, in many places, becomes surface water. The County Sanitation Districts of Los Angeles County, working in conjunction with other agencies in the Los Angeles Basin, operate the largest groundwater recharge program in California. Widespread contamination of groundwater by methyl tertiary butyl ether (MTBE) has triggered the exploration of different technologies for in situ removal of the pollutant, including biostimulation of naturally occurring microbial communities or bioaugmentation with specific microbial strains known to biodegrade the oxygenate. |
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