| Abstract: | The main source of water in the 3,400-square-mile area of southern Navajo County, Ariz., is the large volume in storage in the Coconino aquifer. Withdrawals from the aquifer increased from about 13,800 acre-feet in 1960 to 38,400 acre-feet in 1972. Aquifer tests indicate that hydraulic conductivity ranges from 8 to 40 feet per day; the flow-net analysis indicates that the hydraulic conductivity may be as much as 80 feet per day in places. In the southern and central parts the aquifer is unconfined, and the storage coefficient is estimated to be about 0.15. In the northern and eastern parts the aquifer is confined, and the storage coefficient ranges from 0.00013 to 0.0014. A mathematical model was developed to simulate the groundwater system and to provide a management tool for estimating the effects of pumping. The model indicates that the inflow to and outflow from the aquifer were about 105,600 acre-feet in 1960 and that about 192,000 acre-feet of water was derived from storage in 1960-72. The model provides an approximation of the Coconino aquifer. (USGS) |
| Genre: | USGS Numbered Series |
| ProdID: | 10159 |
| Citation Author: | Mann, Larry J. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | vi, 76 p. :graphs, maps ;29 cm. -- |
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| Citation Publisher: | U.S. Geological Survey, |
| Citation Series: | Open-File Report |
| Citation Series Code: | OFR |
| Citation Series Number: | 79-348 |
| Citation Search Results Text: | Water budget and mathematical model of the Coconino Aquifer, southern Navajo County, Arizona; 1979; OFR; 79-348; Mann, Larry J. |
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| Citation Year: | 1979 |
| Type: | citation/reference |
| Text: | Water budget and mathematical model of the Coconino Aquifer, southern Navajo County, Arizona; 1979; OFR; 79-348; Mann, Larry J. |
| 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, |
