Filters: Tags: groundwater (X)2,554 results (154ms)
Groundwater quality data were collected in 5,000 wells between 1988-2001 by the National Water-Quality Assessment Project. About 1,500 of these wells were sampled again between 2002-2012 to evaluate decadal changes in groundwater quality. Monitoring wells, domestic supply wells, and some public supply wells were included in this study. All water was collected prior to treatment. Groundwater samples used to evaluate decadal change were collected from networks of wells with similar characteristics. Some networks, consisting of domestic or public supply wells, were used to assess changes in the quality of groundwater used for drinking water supply. Other networks, consisting of monitoring wells, assessed changes in...
Water level data during pumping for stressed HPFM measurements for selected boreholes near GMH Electronics Superfund site, Roxboro, NC (2012-2015)
The collection of borehole geophysical logs and images and continuous water-level data was conducted by the U.S. Geological Survey South Atlantic Water Science Center in the vicinity of the GMH Electronics Superfund site near Roxboro, North Carolina, during December 2012 through July 2015. The study purpose was part of a continued effort to assist the U.S. Environmental Protection Agency in the development of a conceptual groundwater model for the assessment of current contaminant distribution and future migration of contaminants. Previous work by the U.S. Geological Survey South Atlantic Water Science Center at the site involved similar data collection, in addition to surface geologic mapping and passive diffusion...
Categories: Data; Types: Citation; Tags: North Carolina, Person County, Roxboro, fractured-rock aquifer, geophysical logging,
Natural occurrences of ground water with moderate (10 to 50 micrograms per liter) to high (greater than 50 micrograms per liter) concentrations of arsenic are common throughout much of the Western United States. High concentrations of arsenic are generally associated with one of four geochemical environments: (1) basin-fill deposits of alluvial-lacustrine origin, particularly in semiarid areas, (2) volcanic deposits, (3) geothermal systems, and (4) uranium and gold-mining areas. These findings are based on an extensive literature review, compilation of unpublished reports and data, and the review of data bases containing more than 7,000 analyses of ground-water samples for arsenic. In the first two environments,...
Categories: Publication; Types: Citation; Tags: Groundwater
This dataset includes the magnetotelluric (MT) sounding data collected in 2009 in and near the San Luis Basin, New Mexico. The U.S. Geological Survey conducted a series of multidisciplinary studies, including MT surveys, in the San Luis Basin to improve understanding of the hydrogeology of the Santa Fe Group and the nature of the sedimentary deposits comprising the principal groundwater aquifers of the Rio Grande rift. The shallow unconfined and the deeper confined Santa Fe Group aquifers in the San Luis Basin are the main sources of municipal water for the region. The population of the San Luis Basin region is growing rapidly and water shortfalls could have serious consequences. Future growth and land management...
Concentrations of tetrachloroethylene in shallow (less than 15 meters) groundwater samples from York, Nebraska, 2015
These data contain concentrations of tetrachloroethylene in shallow groundwater samples collected in 2015 by the U.S. Environmental Protection Agency (EPA). These data are a subset of all the groundwater at the site. Samples were collected using direct-push technology. Only samples collected within the study area on 1 of the 10 sampling periods discussed in the journal article are included in this data set. In order to protect personally identifiable information (PII), all data collected by the U.S. Environmental Protection Agency do not contain spatial information. Please contact the U.S. Environmental Protection Agency for permission and access to spatial information for these samples. These data support...
Types: Citation; Tags: contamination and pollution, environment, groundwater, water quality
Regional finite-difference models tend to have large cell sizes, often on the order of 1–2 km on a side. Although the regional flow patterns in deeper formations may be adequately represented by such a model, the intricate surface water and groundwater interactions in the shallower layers are not. Several stream reaches and nearby wells may occur in a single cell, precluding any meaningful modeling of the surface water and groundwater interactions between the individual features. We propose to replace the upper MODFLOW layer or layers, in which the surface water and groundwater interactions occur, by an analytic element model (GFLOW) that does not employ a model grid; instead, it represents wells and surface waters...
Categories: Publication; Types: Citation; Tags: Groundwater
Categories: Publication; Types: Citation; Tags: Aquifers, Cleaning process, Cleanup, Decontamination, Groundwater,
Categories: Publication; Types: Citation; Tags: Effluent treatment, Effluents, Germany, Berlin, Groundwater, Pilot Plants,
Categories: Publication; Types: Citation; Tags: Drinking water, Groundwater, Landscape, Lawns, Pesticide residues,
Categories: Publication; Types: Citation; Tags: Forests, Groundwater, Hydrology, Moisture Content, Pine,
Mobilization and Co-Transport of Pyrene in the Presence of Pseudomonas aeruginosa UG2 Biosurfactants in Sandy Soil Columns
Categories: Publication; Types: Citation; Tags: Biological treatment, Bioremediation, Cleanup, Decontamination, Groundwater,
Towards complete biodiversity assessment: an evaluation of the subterranean bacterial communities in the Oklo region of the sole surviving natural nuclear reactor
Categories: Publication; Types: Citation; Tags: Bacteria, Community composition, Gabon, Genetic diversity, Ground water,
Cosolvency Effects of Monoethanolamine and Triethanolamine: Implications for the Remediation of Benzene in Groundwater at Sour-Gas Plants
Categories: Publication; Types: Citation; Tags: Amines, Benzenes, Canada, Canada, Western, Groundwater,
Groundwater Rights and Legislation for Sustainable Development in Arid Regions: The Case of Saudi Arabia
Categories: Publication; Types: Citation; Tags: Aquifer Systems, Aquifers, Arid environments, Groundwater, Groundwater (see also Aquifers),
Categories: Publication; Types: Citation; Tags: Cleaning process, Clogging, Groundwater, Groundwater pollution, Iron,
Permeable treatment walls for in-situ groundwater remediation -- how to avoid precipitation and bio-clogging
Categories: Publication; Types: Citation; Tags: Adsorption, Chemical precipitation, Field Tests, Filters, Fouling control,
Noble gases, stable isotopes, and radiocarbon as tracers of flow in the Dakota aquifer, Colorado and Kansas
Categories: Publication; Types: Citation; Tags: Aquifers, Flow Pattern, Groundwater, Groundwater Recharge, SW 2040 Groundwater management,
Categories: Publication; Types: Citation; Tags: Cottonwood Trees, Ephemeral Streams, Groundwater, Riparian Vegetation, SW 0860 Water and plants,