| Abstract: | The San Carlos Indian Reservation includes about 2,900 sq mi in east- central Arizona. Relatively impermeable pre-Tertiary rocks are exposed in about 23% of the reservation and underlie water-bearing Tertiary and quaternary basin fill and Quaternary stream alluvium in much of the southern part of the reservation. About 9,000 members of the San Carlos Apache Tribe live on the reservation and rely on groundwater to meet public supply, irrigation, and other needs. Basin fill is widespread in the valley of the San Carlos and Gila Rivers and consists of fine sand, silt, limestone, clay, and pyroclastic volcanics that may attain a total maximum thickness of more than 3,200 ft in the reservation. Quaternary stream alluvium overlies the basin fill along many streams and washes. Stream alluvium consists of poorly sorted, unconsolidated, gravelly, muddy, sand; and sandy gravel and reaches a maximum thickness of 100 ft along the San Carlos and Gila Rivers. The volume of recoverable water stored in the basin fill to a depth of 1,200 ft is estimated to be about 20 million acre-ft. The volume of recoverable water stored in the stream alluvium on the reservation is estimated to be more than 100,000 acre-ft. The stream alluvium along the San Carlos River supplies most of the water used for drinking. Water throughout much of the reservation is suitable for most uses except for that in the alluvium along the Gila River, which contains large concentrations of dissolved solids. (USGS) |
| Genre: | USGS Numbered Series |
| ProdID: | 26371 |
| Citation Author: | Brown, J. G. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | v, 39 p. :ill., maps ;28 cm. |
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| Citation Publisher: | U.S. Geological Survey ;
Books and Open-File Reports Section [distributor], |
| Citation Series: | Water-Resources Investigations Report |
| Citation Series Code: | WRI |
| Citation Series Number: | 89-4152 |
| Citation Search Results Text: | Geology and ground-water resources of the San Carlos Indian Reservation, Gila, Graham, and Pinal counties, Arizona; 1989; WRI; 89-4152; Brown, J. G. |
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| Citation Year: | 1989 |
| Type: | citation/reference |
| Text: | Geology and ground-water resources of the San Carlos Indian Reservation, Gila, Graham, and Pinal counties, Arizona; 1989; WRI; 89-4152; Brown, J. G. |
| URL (THUMBNAIL): | http://pubs.usgs.gov/wri/1989/4152/report-thumb.jpg |
| URL (DOCUMENT): | http://pubs.usgs.gov/wri/1989/4152/report.pdf |
| URL (PLATE): | http://pubs.usgs.gov/wri/1989/4152/plate-1.pdf |
| URL (PLATE): | http://pubs.usgs.gov/wri/1989/4152/plate-2.pdf |
| URL (INDEX PAGE): | http://ngmdb.usgs.gov/Prodesc/proddesc_47240.htm |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | U.S. Geological Survey ;
Books and Open-File Reports Section [distributor], |
