Publications
Read publications and other informational products to learn more about USGS science occurring in Region 6.
Filter Total Items: 1627
Geologic history and hydrogeologic setting of the Edwards-Trinity aquifer system, west-central Texas Geologic history and hydrogeologic setting of the Edwards-Trinity aquifer system, west-central Texas
The Edwards-Trinity aquifer system underlies about 42,000 square miles of west-central Texas. Nearly flat-lying, mostly Comanche (Lower Cretaceous) strata of the aquifer system thin northwestward atop massive pre-Cretaceous rocks that are comparatively impermeable and structurally complex. From predominately terrigenous clastic sediments in the east and fluvialdeltaic (terrestrial)...
Authors
R.A. Barker, P. W. Bush, E.T. Baker
Dissolved-solids concentrations and hydrochemical facies in water of the Edwards-Trinity aquifer system, west-central Texas Dissolved-solids concentrations and hydrochemical facies in water of the Edwards-Trinity aquifer system, west-central Texas
Much of the Edwards-Trinity aquifer system contains freshwater, but sizable parts contain marginally fresh or slightly saline water. The predominant water type in the aquifer system is calcium bicarbonate; however, one of seven other hydrochemical facies characterizes the water in places. The median dissolved-solids concentration of water samples from the Edwards aquifer in the Balcones...
Authors
Peter W. Bush, Randy L. Ulery, Rochelle L. Rittmaster
Water resources data Texas, water year 1993, volume 3. Colorado River basin, Lavaca River basin, Guadalupe River basin, Nueces River basin, Rio Grande basin, and intervening coastal basins Water resources data Texas, water year 1993, volume 3. Colorado River basin, Lavaca River basin, Guadalupe River basin, Nueces River basin, Rio Grande basin, and intervening coastal basins
No abstract available.
Authors
S. C. Gandara, E. M. McPherson, W. Gibbons, B.A. Hinds, F.L. Andrews
Organic compounds downstream from a treated-wastewater discharge near Dallas, Texas, March 1987 Organic compounds downstream from a treated-wastewater discharge near Dallas, Texas, March 1987
Water and streambed-sediment samples were collected on March 9 and 10,1987 from one site upstream and three sites downstream of the discharge from a municipal wastewater-treatment plant on Rowlett Creek near Dallas, Texas. To extract and separate organic compounds, purgeand-trap, closed-loop stripping, and pH-adjusted solvent extraction methods were used for water samples; and a Soxhlet...
Authors
P.M. Buszka, L.B. Barber, M.P. Schroeder, L.D. Becker
Water resources data Texas, water year 1993, volume 1. Arkansas River basin, Red River basin, Sabine River basin, Neches River basin, Trinity River Basin, and intervening coastal basins Water resources data Texas, water year 1993, volume 1. Arkansas River basin, Red River basin, Sabine River basin, Neches River basin, Trinity River Basin, and intervening coastal basins
No abstract available.
Authors
S. C. Gandara, E. M. McPherson, W. Gibbons, B.A. Hinds, F.L. Andrews
Water resources data Texas, water year 1993, volume 4. Ground water Water resources data Texas, water year 1993, volume 4. Ground water
No abstract available.
Authors
S. C. Gandara, R. E. Jones
Approximate changes in water levels in wells completed in the Chicot and Evangeline aquifers, 1990-94 and 1993-94, in Fort Bend County and adjacent areas, Texas Approximate changes in water levels in wells completed in the Chicot and Evangeline aquifers, 1990-94 and 1993-94, in Fort Bend County and adjacent areas, Texas
Measurements of water levels from wells completed in the Chicot and Evangeline aquifers were used to construct maps showing approximate changes of water levels in Fort Bend County and adjacent areas during 1990-94 and 1993-94.
Authors
L.S. Coplin, H. X. Santos
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 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
This report is one in a series of reports that depict water-level changes since 1977 and compaction of subsurface material since 1973. 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...
Authors
Mark C. Kasmarek, L.S. Coplin, Horacio X. Santos
Geologic framework and hydrogeologic characteristics of the Edwards Aquifer outcrop, Comal County, Texas Geologic framework and hydrogeologic characteristics of the Edwards Aquifer outcrop, Comal County, Texas
All of the hydrogeologic subdivisions within the Edwards aquifer outcrop in Comal County have some porosity and permeability. The most porous and permeable appear to be hydrogeologic subdivision VI, the Kirschberg evaporite member of the Kainer Formation; hydrogeologic subdivision III, the leached and collapsed members, undivided; and hydrogeologic subdivision II, the cyclic and marine...
Authors
T. A. Small, J.A. Hanson
Trinity River Basin, Texas Trinity River Basin, Texas
In 1991 the Trinity River Basin National Water-Quality Assessment (NAWQA) will include assessments of surface-water and ground-water quality. Initial efforts have focused on identifying water-quality issues in the basin and on the environmental factors underlying those issues. Physical characteristics described include climate, geology, soils, vegetation, physiography, and hydrology...
Authors
Randy L. Ulery, Peter C. Van Metre, Allison S. Crossfield
Influence of redox environment and aqueous speciation on metal transport in groundwater: Preliminary results of tracer injection studies Influence of redox environment and aqueous speciation on metal transport in groundwater: Preliminary results of tracer injection studies
No abstract available.
Authors
J. Davis, Kent D. Becher, B.A. Rea, A.S. Maest, S. P. Garabedian
Water resources data Texas, water year 1992, volume 4. Ground water Water resources data Texas, water year 1992, volume 4. Ground water
No abstract available.
Authors
S. C. Gandara, H.D. Buckner, R. E. Jones