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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
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