Version History for U.S. Geological Survey Scientific Investigations Report 2021-5003

Hydrogeology and Model-Simulated Groundwater Availability in the Salt Fork Red River Aquifer, Southwestern Oklahoma, 1980-2015

By S. Jerrod Smith, John H. Ellis, Nicole C. Paizis, Carol J. Becker, Derrick L. Wagner, Jessica S. Correll, and R. Jacob Hernandez
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First posted online March 15, 2021
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Revised and reposted June 13, 2025, as version 1.1

Justifications for the revisions:

Equal-proportionate-share (EPS) pumping rate values in version 1.0 of the report were not divided by the number of acres per model cell. At the 200-by-200-foot cell size, each model cell contains 0.91827 acres. The values in table 12 were thus corrected by dividing the version 1.0 values by 0.91827. Corresponding annual yields were calculated from the corrected values in table 12 and then rounded to three significant figures.


Descriptions of the revisions:

In version 1.0 of the report, the values in table 12 (on p. 71) for EPS pumping rates (in acre-feet per acre per year) were as follows:

Period (years): 20
Recharge reduced by 10 percent: 0.4352
Normal recharge: 0.4643
Recharge increased by 10 percent: 0.4933

Period (years): 40
Recharge reduced by 10 percent: 0.4102
Normal recharge: 0.4412
Recharge increased by 10 percent: 0.4719

Period (years): 50
Recharge reduced by 10 percent: 0.4086
Normal recharge: 0.4400
Recharge increased by 10 percent: 0.4708


In section "Abstract," on p. 2, in the first full paragraph, the sentences in version 1.0 of the report read as follows:
"The 20-, 40-, and 50-year EPS pumping rates under normal recharge conditions were about 0.46, 0.44, and 0.44 acre-ft per acre per year, respectively. Given the 155,929-acre modeled aquifer area, these rates correspond to annual yields of about 71,700, 68,600, and 68,600 acre-ft/yr, respectively."


In section "Equal-Proportionate Share," on p. 71, in the second full paragraph, the sentences in version 1.0 of the report read as follows:
"The 20-, 40-, and 50-year EPS pumping rates under normal recharge conditions were about 0.46, 0.44, and 0.44 acre-foot per acre per year, respectively (table 12). Given the 155,929-acre modeled aquifer area, these rates correspond to annual yields of about 71,700, 68,600, and 68,600 acre-ft/yr, respectively."


In section "Summary," on p. 78, in the sixth full paragraph, the sentences in version 1.0 of the report read as follows:
"The 20-, 40-, and 50-year EPS pumping rates under normal recharge conditions were about 0.46, 0.44, and 0.44 acre-ft per acre per year, respectively. Given the 155,929-acre modeled aquifer area, these rates correspond to annual yields of about 71,700, 68,600, and 68,600 acre-ft/yr, respectively."