1. Approximate water-level changes in wells in the Chicot and Evangeline aquifers, 1977-82 and 1981-82, and measured compaction 1973-82, in the Houston-Galveston region, Texas [cartographic material] Yale Public content 1982. 2002-06-01T04:00:00Z. 2023-04-20T03:01:24Z. Geological Survey (U.S.). The Survey. English. cartographic image. Public. Texas, Houston, Galveston County, Houston (Tex.), and Galveston County (Tex.).