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Publications

Read publications and other informational products to learn more about USGS science occurring in Region 6.

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Environmental tritium in the Edwards Aquifer, central Texas 1963-71 Environmental tritium in the Edwards Aquifer, central Texas 1963-71

Tritium concentrations of samples from 50 wells and springs in the Edwards aquifer in the San Antonio area of Texas have been analysed. Tritium now in the aquifer is partly natural cosmic ray produced tritium, but most is tritium produced by atmospheric thermonuclear tests in the 1950's and early 1960's. The tritium levels in atmospheric precipitation and streams recharging the Edwards...
Authors
Frederick Joseph Pearson, Paul L. Rettman, T.A. Wyerman

Relation of precipitation to annual ground-water recharge in the Edwards Aquifer, San Antonio area, Texas Relation of precipitation to annual ground-water recharge in the Edwards Aquifer, San Antonio area, Texas

Annual recharge data obtained from historical records and mean-annual precipitation data computed from rainfall records were used to develop simple linear-regression equations for use in estimating annual recharge for seven subbasins in the San Antonio area. Adjustments were made to the precipitation parameter to account for the effects of year-end storms. The standard errors of estimate...
Authors
Celso Puente

Hydrologic data for Little Elm Creek, Trinity River Basin, Texas, 1973 Hydrologic data for Little Elm Creek, Trinity River Basin, Texas, 1973

The U.S. Soil Conservation Service is actively engaged in the implementation of flood- and soil-erosion reducing measures in Texas under the authority of "The Flood Control Act of 1936 and 1944" and "Watershed Protection and Flood Prevention Act" (Public Law 566), as amended. The Soil Conservation Service has found that approximately 3,500 floodwater-retarding structures would be...
Authors
R.M. Slade, J.M. Taylor

The quality of surface waters in Texas The quality of surface waters in Texas

The discharge-weighted average concentrations of dissolved solids, chloride, and ,sulfate for many of the principal streams in Texas are less than 500 mg/l (millijgraljls per liter), 250 mg/l, and 250 mg/l, respectively. At 65 of 131 sites on streams that were sampled at least 10 times, the biochemical oxygen demand of at least half the samples exceeded 3.0 mg/l. At 20 of the sites, the...
Authors
Jack Rawson
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