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Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Types Map Service (1) OGC WFS Layer (1) OGC WMS Layer (1) OGC WMS Service (1) Contacts John E Solder U.S. Geological Survey - ScienceBase Water Resources Utah Water Science Center Jennifer B Sharpe More... Categories Data (4) Data Release - Revised (1) Tag Types Place (9) Theme (9) USGS Scientific Topic Keyword (8) Harvest Set (9) Tag Schemes Geographic Names Information System (GNIS) (7) None (7) USGS Thesaurus (2) none (1) Common geographic areas (1) View Results as: JSON ATOM CSV

Dissolved Gas, Environmental Tracer Concentrations, and Lumped Parameter Modeling Results for Groundwater Age Dating in the Glacial Aquifer System, Conterminous United States This data release documents nine Microsoft Excel tables that contain data for understanding groundwater ages in the Glacial aquifer system. Results for the three sample networks (PAS, principal aquifer study; MSS, modeling support study; FPS, flow path study) are described by three tables each: dissolved gas modeling results, environmental tracer concentrations (tritium, tritiogenic helium-3, sulfur hexafluoride, carbon-14, and radiogenic helium-4), and results for the mean age and age distribution. Tables are labeled by network and data type (as described below) separated by an underscore (_). For example, dissolved gas modeling results from the PAS network is label ‘PAS_NGmodel’. Dissolved gas modeling results... Tags: Connecticut, Dissolved gas, Glacial Aquifer System, Groundwater, Groundwater age, All tags... Idaho, Illinois, Indiana, Iowa, Kansas, Lumped parameter modeling, Maine, Massachusetts, Michigan, Minnesota, Missouri, Montana, NAWQA, Nebraska, New Hampshire, New Jersey, New York, North Dakota, Ohio, Pennsylvania, Recharge temperature, Rhode Island, South Dakota, USGS Science Data Catalog (SDC), Vermont, Washington, Water quality, Wisconsin, cycle 3, Fewer tags Data for Groundwater Age and Susceptibility of Poorly Consolidated Sedimentary Aquifers of the United States Gulf Coast: Results from the Southeast Coastal Plain (SECP), Coastal Lowland (CLOW), Mississippi Embayment and Texas Coastal Upland (METX) Principal Aquifer Networks This data release documents eight Microsoft Excel tables; four which contain data for understanding groundwater ages in the South East Coastal Plain (SECP), Coastal Lowlands (CLOW) and Mississippi Embayment and Texas Coastal Uplands (METX) aquifer systems and four that describe the data fields. Results described include dissolved gas modeling results, environmental tracer concentrations (tritium, tritiogenic helium-3, sulfur hexafluoride, and radiogenic helium-4), mean age and age distribution, and carbon-14 geochmical modeling results Dissolved gas modeling results (DGmodel) contains detailed information on the calibration of dissolved gas models to dissolved gas concentrations (neon, argon, krypton, xenon, and... Categories: Data; Tags: Alabama, Arkansas, Coastal Lowlands (CLOW), Cycle 3, Dissolved gas, All tags... Florida, Georgia, Groundwater, Groundwater age, Gulf Coast, Gulf and South Atlantic Coast Aquifers, Kentucky, Louisiana, Lumped parameter modeling, Mississippi, Mississippi Embayment and Texas Coastal Uplands (METX), Missouri, NAWQA, Recharge temperature, South Atlantic coast, South Carolina, South East Coastal Plain (SECP), Tennessee, Texas, USGS Science Data Catalog (SDC), Water Quality, Water quality, Fewer tags Lumped parameter models of groundwater age, Spanish Valley Watershed, Grand and San Juan Counties, Utah This data release documents two Microsoft Excel tables; one contains data for understanding groundwater ages in the Spanish Valley watershed, and one that describe the data fields. Mean ages and age distributions from 19 groundwater samples were estimated in support of an evaluation of the groundwater resources of the Spanish Valley watershed (Masbruch and others, 2019). Individual groundwater well and spring vulnerability to land-surface contamination and changes in hydraulic conditions (for example, water extraction or reduced recharge) can be assessed using environmental tracer-based groundwater age. The detailed interpretation of groundwater age reported here supplements the apparent tracer ages of Masbruch... Tags: Dissolved gas, Geochemistry, Grand County, Groundwater, Groundwater age, All tags... Hydrology, Lumped parameter modeling, San Juan County, Spanish Valley, USGS Science Data Catalog (SDC), Utah, Utah, Water quality, Fewer tags Data for timescales of water-quality change in a karst aquifer, south-central Texas 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 using the program TracerLPM (Jurgens and others, 2012). The final estimates for mean groundwater... Tags: Aquifer vulnerability, Cycle 3, Dissolved gas, Edwards aquifer, Groundwater, All tags... Groundwater age, Hydrology, Karst, Lumped parameter modeling, NAWQA, Radiocarbon, Texas, Tritium, USGS Science Data Catalog (SDC), Water Quality, Water quality, Fewer tags Lumped parameter models of groundwater age and noble gas models of recharge conditions in support of Groundwater and Surface-Water Resources near Red Fleet Reservoir, Uintah County, Utah This data release documents four Microsoft Excel tables; one contains data for understanding water ages, one contains noble gas model data, two that describe the data fields. Results described include environmental tracer concentrations (tritium, tritiogenic helium-3, choloroflourocarbons, and radiogenic helium-4), mean age and age distribution, noble gas concentrations, and groundwater recharge conditions. Mean age and age distribution results (LPM) contain final models of groundwater age by calibration of lumped parameter models to tracer concentrations (Jurgens and others, 2012). Please see the main manuscript for additional details on the results presented in this table. Noble gas model results (CEmodel) contain... Categories: Data; Tags: Dissolved gas, Geochemistry, Groundwater, Groundwater age, Hydrology, All tags... Lumped parameter modeling, Recharge temperature, Red Fleet Reservoir, USGS Science Data Catalog (SDC), Uintah County, Uintah County, Utah, Utah, Water balance, Fewer tags Lumped parameter models of groundwater age from the Columbia Plateau Aquifer, Vertical Flowpath Study Network This data release documents two Microsoft Excel tables that contain data for understanding tracer concentrations and groundwater age in the Columbia Plateau aquifer system. Results for geochemical correction of carbon-14, and lumped parameter modeling of groundwater age for the sample network (VPFS, vertical flow path study) are described. Geochemical carbon-14 correction results (RFG) describe geochemical correction of carbon-14 in dissolved inorganic carbon (DIC) for groundwater age dating. Datasets includes measured water parameters and chemistry, model parameter inputs, and final corrected carbon-14 in DIC. Geochemical correction was completed using the revised Fontes and Granier model of Han and Plummer (2013).... Categories: Data; Tags: Columbia Plateau Aquifer, Environmental tracers, Geochemistry, Hydrology, USGS Science Data Catalog (SDC), All tags... Washington, groundwater age, lumped parameter modeling, radiocarbon, Fewer tags Data for Assessing the Susceptibility of Groundwater Using Environmental Tracers in Northern Atlantic Coastal Plain Aquifer System and Piedmont and Blue Ridge Crystalline-Rock Aquifers of Eastern United States This data release documents four tables that contain data for assessing the susceptibility of groundwater using environmental tracers collected from public-supply wells located in the Northern Atlantic Coastal Plain (NACP) Aquifer System and Piedmont and Blue Ridge Crystalline-Rock Aquifers of Eastern United States. Results for two modeling support studies located within the NACP are also included. Table 1 provides the primary results of this study and it contains condensed results from dissolved gas modeling and calculated environmental tracer concentrations, as well as results of the tritium age classification, susceptibility index, the mean groundwater age, fraction of Modern water (water that was recharged after... Tags: Alabama, Cycle 3, Delaware, Dissolved gas, Georgia, All tags... Groundwater age, Hydrogeology, Lumped parameter modeling, Maryland, NAWQA, New Jersey, New York, North Atlantic Coastal Plain aquifer system, North Carolina, Piedmont and Blue Ridge crystalline-rock aquifers, Radiocarbon, Recharge temperature, South Carolina, USGS Science Data Catalog (SDC), Virginia, Water Quality, Water Resources, water quality, Fewer tags Noble gas isotopes and lumped parameter model results for environmental tracer based groundwater ages, South Rim Grand Canyon, Arizona, USA This data release documents three Microsoft Excel tables; one contains noble gas isotopic data, one contains data for understanding groundwater ages in the South Rim of the Grand Canyon, and one that describe the data fields. Results described include raw noble gas concentrations, environmental tracer concentrations (tritium, tritiogenic helium-3, sulfur hexafluoride, carbon-14, and chlorofluorocarbons), and mean age and age distribution. Noble gas isotopes (NobleGas) contain noble gas isotope concentrations measured for South Rim springs. Samples were collected in pinch clousure copper tubes (Weiss, 1968) and analyzed at the University of Utah Dissolved Gas Lab. Mean age and age distribution... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Arizona, Dissolved gas, Geochemistry, Grand Canyon, Grand Canyon, All tags... Grand Canyon National Park, Groundwater, Groundwater age, Havasupai Reservation, Hydrology, Lumped parameter modeling, Noble gas isotopes, Recharge temperature, South Rim, USGS Science Data Catalog (SDC), Water quality, age tracers, desert southwest, environmental tracers, groundwater, groundwater age, isotopes, noble gas, south rim, Fewer tags Data for Distribution of Groundwater Age in Aquifers Used for Public Supply in the Continental United States, 2004 - 2017 (Version 1.1: June 2022) This data release documents seven tables that contain environmental tracer data and lumped parameter model (LPM) results that are used for assessing the distribution of groundwater age in 21 Principal Aquifers of the continental United States. Groundwater samples were collected from 1,279 sites and analyzed for environmental tracers: tritium, tritiogenic helium-3, sulfur hexafluoride, carbon-14, and radiogenic helium-4. For each sample, groundwater age distributions were estimated by fitting LPMs to the environmental tracers using the computer program TracerLPM (Jurgens and others, 2012). Calibrated lumped parameter models provide the optimal distribution of ages in a sample that explain the measured concentrations... Categories: Data Release - Revised; Tags: Alabama, Arizona, Arkansas, Basin and Range basin-fill aquifers (BNRF), Basin and Range carbonate-rock aquifers (BNRC), All tags... Biscayne aquifer (BISC), California, California Coastal Basin aquifers (CACB), Cambrian-Ordovician aquifer system (CMOR), Central Valley aquifer system (CVAL), Coastal lowlands aquifer system (CLOW), Colorado, Colorado Plateaus aquifers (COPL), Columbia Plateau basaltic-rock aquifers (CLPT), Connecticut, Cycle 3, Delaware, Dissolved gas, Edwards carbonate aquifer system (EDCB), Edwards-Trinity aquifer system (EDTR), Environmental tracers, Florida, Floridan aquifer system (FLOR), Georgia, Glacial aquifer system (GLAC), Groundwater age, High Plains aquifer (HPAQ), Hydrology, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Lumped parameter modeling, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Mississippi embayment-Texas coastal uplands aquifer system (METX), Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Northern Atlantic Coastal Plain aquifer system (NACP), Ohio, Oklahoma, Oregon, Ozark Plateaus aquifer system (OZRK), Pennsylvania, Piedmont and Blue Ridge crystalline-rock aquifers (PDBR), Radiocarbon, Recharge temperature, Rio Grande aquifer system (RIOG), South Carolina, South Dakota, Southeastern Coastal Plain aquifer system (SECP), Tennessee, Texas, USGS National Water Quality Assessment Project, USGS Science Data Catalog (SDC), Utah, Valley and Ridge and Piedmont and Blue Ridge carbonate-rock aquifers (VRPD), Vermont, Virginia, Washington, Water Resources, West Virginia, Wisconsin, Wyoming, environment, inlandWaters, Fewer tags