U.S. Department of the InteriorU.S. Geological SurveyCoplin, L.S., Natalie A. Houston, and Dexter W. Brown2010-02-152010-02-152001http://hdl.handle.net/1969.3/228968 sheetsThis report is one in an annual series of reports that depicts water-level altitudes and water-level changes since 1977 and compaction since 1973 in the Chicot and Evangeline aquifers in the Houston-Galveston region, Texas. The report, prepared in cooperation with the City of Houston and the Harris-Galveston Coastal Subsidence District, present maps for the Chicot and Evangeline Aquifers showing the approximate water-level altitudes in wells in 2001 and approximate water-level changes in wells from 1977 to 2001, a map showing extensometer site locations and graphs showing measured compaction of subsurface material at selected sites from 1973 to 2000. The most recent previously published water-level-altitude maps and water-level-change maps for the two aquifers in the region are by Coplin and Santos (2000). The Houston-Galveston region comprises Harris and Galveston counties and adjacent parts of Brazoria, Fort Bend, Waller, Montgomery, Liberty, and Chambers Counties.water levelaltitudeschangesaquifersgeologicalsubsidenceBook