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Data for timescales of water-quality change in a karst aquifer, south-central Texas

Metadata Updated: October 26, 2023

Continuous monitoring and discrete water-quality sampling were coupled in a karst aquifer to assess drivers and timescales of water-quality change. Water-quality data included environmental tracers of groundwater age (tritium [3H], tritiogenic helium-3 [3He-trit], sulfur hexafluoride [SF6], carbon-14 [14C], and radiogenic helium-4 [4He-rad]). All water quality data is available from the U.S. Geological Survey NWIS database (U.S. Geological Survey, 2019). Groundwater ages were estimated by calibration of environmental tracers to lumped parameter models of groundwater age for multiple samples collected at six groundwater wells. The final estimates for mean groundwater ages ranged from less than 10 to greater than 700 years and provide insight into timescales of aquifer vulnerability. This data release includes five Microsoft Excel tables detailing these data (each table is also provided as a tab-delimited text file): Table_1_TXETN_AgeInterpretations: Table containing dissolved gas modeling results, environmental tracer concentrations, and lumped parameter modeling results. Table_2_TXETN_DissolvedGasModeling: Table containing dissolved gas modeling results. Table_3_TXETN_ComputedTracerConcentrations: Table containing computed tracer concentrations. Table_4_TXETN_14CAdjustments: Table containing Carbon 14 adjustments. Table_5_TXETN_Abbreviations: Table containing definitions for all abbreviations found in tables 1 through 4.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date June 1, 2023
Metadata Updated Date October 26, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date October 26, 2023
Publisher U.S. Geological Survey
Identifier USGS:5c9ba747e4b0b8a7f62c2edd
Data Last Modified 20200826
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id f7c4e17f-9f98-49ef-a729-8734c731803e
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -100.02777099609,29.108976151453,-98.08319091797,29.745301662214
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash 4eba59a530505fb83824445f24e218fa0876f197948edceca735eeed1e786bf8
Source Schema Version 1.1
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