| Abstract: | The Hueco bolson deposits in the El Paso area consist mostly of lenses of gravel, sand, silt, and clay. In the Rio Grande Valley , about 400 to 450 feet of these deposits have been eroded and replaced with as much as 200 feet of alluvium. Groundwater in the shallow alluvial aquifer in the Rio Grande Valley in the Hueco bolson aquifer outside the valley is under water table conditions, whereas groundwater in the bolson aquifer in the valley is under leaky artesian conditions. In the downtown area of El Paso, water level declines of 125 and 150 feet have occurred in the shallow and Hueco bolson aquifers, respectively. Surveys that releveled bench marks along lines to the northeast, the southeast, and along the Rio Grande commonly show subsidence of 0.2 foot and a maximum of 0.41 foot near the river. A comparison of subsidence, water level declines, and clay thickness along the three survey lines shows the expected correlation of greater subsidence for thicker accumulated clay material for a given decline in water levels. Data are not sufficient to determine if the preconsolidation stress has been exceeded. (USGS) |
| Genre: | USGS Numbered Series |
| ProdID: | 28232 |
| Citation Author: | Land, L. F.; Armstrong, C. A. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | vi, 96 p. :ill., maps ;28 cm. |
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| Citation Publisher: | U.S. Geological Survey, |
| Citation Series: | Water-Resources Investigations Report |
| Citation Series Code: | WRI |
| Citation Series Number: | 85-4155 |
| Citation Search Results Text: | A preliminary assessment of land-surface subsidence in the El Paso area, Texas; 1985; WRI; 85-4155; Land, L. F.; Armstrong, C. A. |
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| Citation Year: | 1985 |
| Type: | citation/reference |
| Text: | A preliminary assessment of land-surface subsidence in the El Paso area, Texas; 1985; WRI; 85-4155; Land, L. F.; Armstrong, C. A. |
| URL (THUMBNAIL): | http://pubs.usgs.gov/wri/1985/4155/report-thumb.jpg |
| URL (DOCUMENT): | http://pubs.usgs.gov/wri/1985/4155/report.pdf |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | U.S. Geological Survey, |
