Water-Level Measurement Data, Water-Level Altitude and Long-term Water-Level Altitude Change Contours (2017) in the Chicot, Evangeline, and Jasper Aquifers, Houston-Galveston Region, Texas

Abstract

The U.S. Geological Survey in cooperation with the Harris-Galveston Subsidence District, City of Houston, Fort Bend Subsidence District, and Lone Star Groundwater Conservation District has produced (1) dataset of water-level measurement data and (2) shapefiles of water-level altitudes and water-level changes in the Chicot, Evangeline, and Jasper aquifers in the Houston-Galveston region, Texas.This dataset shows current-year (2017) water-level measurement data, altitudes for each aquifer, 5-year (2012-2017) water-level changes for each aquifer, long-term (1990-2017 and 1977-2017) water-level changes for the Chicot and Evangeline aquifers, and long-term (2000-2017) water-level change for the Jasper aquifer. For the 1-year (2016-17) water-level changes, data were computed as the difference in water-level altitude at each point (well) for which a water-level measurement was made in 2016 and 2017. Five-year (2012-2017) water-level changes were computed the same as for the 1-year water-level changes; the difference in water-level altitude at each point for which a water-level measurement was made in 2012 and 2017.