Summary of extensometric measurements in El Paso, Texas

Water-Resources Investigations Report 2003-4158
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Abstract

Two counter-weighted-pipe borehole extensometers were installed on the left bank of the Rio Grande between El Paso, Texas, and Ciudad Juarez, Chihuahua, Mexico, in 1992. A shallow extensometer measures vertical compaction in the 6- to 100-meter aquifer-system depth interval. A deep extensometer measures vertical compaction in the 6- to 305-meter aquifer-system depth interval. Both extensometers are referenced to the same surface datum, which allows time-series differencing to determine vertical compaction in the depth interval between 100 and 305 meters. From April 2, 1993, through June 13, 2002, 1.6 centimeters of compaction occurred in the 6-to 305-m depth interval. Until February 1999, most aquifer-system compaction occurred in the deeper aquifer-system interval between 100 and 305 meters, from which ground water was extracted. After that time, compaction in the shallow interval from 6 to 100 meters was predominant and attained a maximum of 7.6 millimeters by June 13, 2002. Minor residual compaction is expected to continue; continued maintenance of the El Paso extensometers would document this process.

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Summary of extensometric measurements in El Paso, Texas
Series title Water-Resources Investigations Report
Series number 2003-4158
DOI 10.3133/wri034158
Edition -
Year Published 2003
Language ENGLISH
Description iii, 11 p. : ill. (some col.), col. map ; 28 cm.