Found 42 datasets matching filters.
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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...
Search relevance: 1.00 | Views last month: 2 | Published on: 2026-03-03 -
The U.S. Geological Survey (USGS), in cooperation with the Bureau of Reclamation, began hydrogeologic investigations in 2009 in the Paradox Valley in Colorado. In June 2011, nine groundwater...
Search relevance: 1.00 | Views last month: 1 | Published on: 2026-03-03 -
This data release consists of data (in four tables) for assessing the time scales of arsenic variability in three production wells in New Hampshire; tables that describe the data fields in the...
Search relevance: 1.00 | Views last month: 1 | Published on: 2026-03-03 -
Categorical classification of groundwater age based on concentrations of tritium (3H) in groundwater can provide useful information for the assessment and understanding of groundwater resources....
Search relevance: 1.00 | Views last month: 1 | Published on: 2026-03-03 -
We computed mean groundwater ages and age distributions at eight wells by calibrating lumped parameter models (LPMs) to concentrations of tracers (3H, CFCs, SF6) in samples using the computer...
Search relevance: 1.00 | Views last month: 1 | Published on: 2026-03-03 -
During October 1995 through March 2014, the U.S. Geological Survey in cooperation with the National Park Service, Luray, Virginia Station collected and analyzed samples of selected springs, air...
Search relevance: 1.00 | Views last month: 1 | Published on: 2026-03-03 -
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...
Search relevance: 1.00 | Views last month: 1 | Published on: 2026-03-03 -
Groundwater age is an important indicator of groundwater susceptibility to anthropogenic contamination and a key input to statistical models for forecasting water quality. Numerical models can...
Search relevance: 1.00 | Views last month: 1 | Published on: 2026-03-03 -
In 2018, groundwater samples were collected from aquifers in the Williston Basin in parts of eastern Montana, western North Dakota, and northwestern South Dakota. This dataset includes...
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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...
Search relevance: 1.00 | Views last month: 1 | Published on: 2026-03-03 -
The Mississippi River Valley alluvial aquifer (MRVA) overlies and is bounded by several regional aquifers that make up the Mississippi embayment aquifer system (MEAS) in the central United States....
Search relevance: 1.00 | Views last month: 1 | Published on: 2026-03-03 -
Residence time distribution (RTD) is a critically important characteristic of groundwater flow systems; however, it cannot be measured directly. RTD can be inferred from tracer data with...
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This data release documents nine Microsoft Excel tables that contain data for understanding groundwater ages in the Glacial aquifer system. Results for the four sample networks (PAS, principal...
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This data release codifies and attributes explanatory variables that could potentially influence groundwater quality at 50 groundwater wells used for domestic water supply and 43 groundwater sites...
Search relevance: 1.00 | Views last month: 0 | Published on: 2026-03-03 -
This data release documents three Microsoft Excel tables (and corresponding comma separated data files) that contain estimates of tritium in precipitation data for the continental United States....
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Groundwater age distributions and susceptibility to natural and anthropogenic contaminants were assessed for selected wells across Minnesota. The data provide information to understand how long it...
Search relevance: 1.00 | Views last month: 0 | Published on: 2026-03-03 -
High radium (Ra) concentrations in potable portions of the Cambrian-Ordovician (C-O) aquifer system were investigated using water-quality data and environmental tracers ( 3H, 3Hetrit, SF6 , 14C...
Search relevance: 1.00 | Views last month: 0 | Published on: 2026-03-03 -
This vector data set delineates the approximate boundary of the Eagle River watershed valley-fill aquifer (ERWVFA). This data set was developed by a cooperative project between the U.S....
Search relevance: 1.00 | Views last month: 0 | Published on: 2026-03-07 -
This dataset provides groundwater ages estimates that were used in an assessment of the penetration depth of modern groundwater in the Central Valley aquifer system (CVAL). Groundwater ages were...
Search relevance: 1.00 | Views last month: 0 | Published on: 2026-03-03 -
This data release contains tracer data and estimated age distributions of groundwater samples collected as part of a water availability study for the Mississippi alluvial plain (MAP). The MAP is...
Search relevance: 1.00 | Views last month: 0 | Published on: 2026-03-03
