The pumpage of fresh ground water in the United States in 1995 was estimated to be approximately 77 billion gallons per day (Solley and others, 1998), which is about 8 percent of the estimated 1 trillion gallons per day of natural recharge to the Nation's ground-water systems (Nace, 1960). From an overall national perspective, the ground-water resource appears ample. Locally, however, the availability of ground water varies widely. Moreover, only a part of the ground water stored in the subsurface can be recovered by wells in an economic manner and without adverse consequences.
Citation Information
Publication Year | 1999 |
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Title | Sustainability of ground-water resources |
DOI | 10.3133/cir1186 |
Authors | William M. Alley, Thomas E. Reilly, O. Lehn Franke |
Publication Type | Report |
Publication Subtype | USGS Numbered Series |
Series Title | Circular |
Series Number | 1186 |
Index ID | cir1186 |
Record Source | USGS Publications Warehouse |