| Abstract: | The quality and quantity of recharge to the Santa Maria Valley, Calif., ground-water basin from natural sources, point sources, and agriculture are expressed in terms of a hydrologic budget, a solute balance, and maps showing the distribution of select chemical constituents. Point sources includes a sugar-beet refinery, oil refineries, stockyards, golf courses, poultry farms, solid-waste landfills, and municipal and industrial wastewater-treatment facilities. Pumpage has exceeded recharge by about 10,000 acre-feet per year. The result is a declining potentiometric surface with an accumulation of solutes and an increase in nitrogen in ground water. Nitrogen concentrations have reached as much as 50 milligrams per liter. In comparison to the solutes from irrigation return, natural recharge, and rain, discharge of wastewater from municipal and industrial wastewater-treatment facilities contributes less than 10 percent. The quality of treated wastewater is often lower in select chemical constituents than the receiving water. (Woodard-USGS) |
| Genre: | USGS Numbered Series |
| ProdID: | 27793 |
| Citation Author: | Hughes, Jerry L. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | v, 72 p. :ill., maps ;27 cm. |
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| Citation Publisher: | U.S. Geological Survey, Water Resources Division, |
| Citation Series: | Water-Resources Investigations Report |
| Citation Series Code: | WRI |
| Citation Series Number: | 76-128 |
| Citation Search Results Text: | Evaluation of ground-water quality in the Santa Maria Valley, California; 1977; WRI; 76-128; Hughes, Jerry L. |
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| Citation Year: | 1977 |
| Type: | citation/reference |
| Text: | Evaluation of ground-water quality in the Santa Maria Valley, California; 1977; WRI; 76-128; Hughes, Jerry L. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | U.S. Geological Survey, Water Resources Division, |
