L.S. Coplin Horacio X. Santos Mark C. Kasmarek 1994 <p>This report is one in a series of reports that depict water-level changes since 1977 and compaction of subsurface material since 1973. &nbsp;The report was prepared in cooperation with the City of Houston and the Harris-Galveston Coastal Subsidence District, and presents maps showing the approximate changes in water levels in wells completed in the Chicot and Evangeline aquifers, 1977-94 and 1993-94 (figs. 1-4), extensometer site locations (fig. 5), and measured compaction, 1973-93 (fig. 6), in the Houston-Galveston region. &nbsp;Water-level change maps were prepared previously by Kasmarek and others (1993). &nbsp;The Houston-galveston region includes Harris and Galveston Counties and adjacent parts of Brazoria, Fort Bend, Waller, Montgomery, Liberty, and Chambers Counties.</p> application/pdf 10.3133/ofr94346 en U.S. Geological Survey Approximate changes in water levels in wells completed in the Chicot and Evangeline aquifers, 1977-94 and 1993-94, and measured compaction, 1973-93, in the Houston-Galveston region, Texas reports