| Abstract: | Groundwater is being extensively developed for domestic, agricultural, and industrial use in a 2,320-square mile area in Laramie County, WY., bounded approximately by Horse Creek on the north, Nebraska on the east, Colorado on the south, and pre-Tertiary outcrops on the west. Currently (1977) about 47,300 acres of land are irrigated with groundwater. Groundwater levels are declining in some areas as much as 4 feet per year. The investigation was made to provide State water administrators with data on water-level changes resulting from present (1977) groundwater withdrawals and to provide a means of predicting the future effect of groundwater development. A digital model was developed of the hydrologic system in the post-Cretaceous rocks. The ability of the model to simulate the hydrologic system was determined by comparing the water-level changes measured at 37 observation wells located in areas of irrigation pumping with the water-level changes calculated by the model for 1971-77. Comparison of the measured and calculated changes showed agreement with a root-mean-square deviation of + or - 3.6 feet with 8 feet as the maximum deviation. It is concluded that the model adequately simulates present hydrologic conditions in the post-Cretaceous rocks and may be used to predict the effect of applied stress to the system. (USGS) |
| Genre: | USGS Numbered Series |
| ProdID: | 22797 |
| Citation Author: | Crist, Marvin A. |
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| Citation Edition: | WRI/OFR |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | v, 31 p. ill., maps ;28 cm. |
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| Citation Publisher: | U.S. Dept. of the Interior, Geological Survey, |
| Citation Series: | Open-File Report |
| Citation Series Code: | OFR |
| Citation Series Number: | 80-1104 |
| Citation Search Results Text: | Effect of pumpage on ground-water levels as modeled in Laramie County, Wyoming; 1980; OFR; 80-1104; Crist, Marvin A. |
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| Citation Year: | 1980 |
| Type: | citation/reference |
| Text: | Effect of pumpage on ground-water levels as modeled in Laramie County, Wyoming; 1980; OFR; 80-1104; Crist, Marvin A. |
| URL (THUMBNAIL): | http://pubs.usgs.gov/of/1980/1104/report-thumb.jpg |
| URL (DOCUMENT): | http://pubs.usgs.gov/of/1980/1104/report.pdf |
| URL (PLATE): | http://pubs.usgs.gov/of/1980/1104/plate-1.pdf |
| URL (PLATE): | http://pubs.usgs.gov/of/1980/1104/plate-2.pdf |
| URL (PLATE): | http://pubs.usgs.gov/of/1980/1104/plate-3.pdf |
| URL (PLATE): | http://pubs.usgs.gov/of/1980/1104/plate-4.pdf |
| URL (PLATE): | http://pubs.usgs.gov/of/1980/1104/plate-5.pdf |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | U.S. Dept. of the Interior, Geological Survey, |
