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Wells
Manmade shafts or holes in the Earth's surface used to obtain fluid or gaseous materials. [USGS Feature Class Definitions <http://geonames.usgs.gov/domestic/feature_class.htm>]
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PDF Assessing the Vulnerability of Public-Supply Wells to Contamination: Central Valley Aquifer System near Modesto, California [More info]
Using ground-water geochemical analyses, and mathematical models, the factors affecting the quality of public water supply were identified as pumping schedule, screened interval, past land use within the recharge area, and natural geochemical conditions.
PDF Assessing the Vulnerability of Public-Supply Wells to Contamination: Floridan Aquifer System Near Tampa, Florida [More info]
Using ground-water geochemical analyses and mathematical models, the factors affecting the quality of public water supply were identified as mixing of very recent recharge with older water, karst features, natural geochemical processes, and pumping.
Assessing the vulnerability of public-supply wells to contamination--Edwards aquifer near San Antonio, Texas [More info]
Well vulnerability results from the young age of groundwater. Karst features permit contaminants to move into the aquifer easily, leading to a well mixed aquifer; geochemical processes do not degrade contaminants quickly.
PDF Availability of Groundwater Data for California, Water Year 2008 [More info]
Summary showing number of wells in each county for which water level measurements are available, with description of methodology and well numbering system.
Availability of groundwater data for California, water year 2010 [More info]
Map of California showing the number of wells (by county) with available water-level or water-quality data for Water Year 2010, with descriptions of the data and instructions for obtaining them.
Borehole geophysics as applied to geohydrology [More info]
Project summary, photos of logging truck, and bibliographies on log interpretation techniques and instrumentation to record geophysical data in wells and test holes for studying ground water hydraulics and evaluate waste disposal sites.
PDF Characterizing contaminant concentrations with depth by using the USGS well profiler in Oklahoma, 2003-9 [More info]
Use of specialized sampling equipment to study public water supply wells, with examples showing Arsenic in two aquifers.
Coal database for Cook Inlet and North Slope, Alaska [More info]
Published and nonconfidential unpublished coal data from wells in Alaska. Includes well locations, depth and thickness of coal in well, formation type and name, and business administrative information such as permit numbers.
PDF Computer simulation of reservoir depletion and oil flow from the Macondo well following the Deepwater Horizon blowout [More info]
This model estimates, by simulation, the reservoir pressure, flow rate, and volume of oil discharged, and the report discusses the uncertainty in the estimates.
PDF Drilling a deep geologic test well at Hilton Head Island, South Carolina [More info]
With the South Carolina Department of Health and Environmental Control, USGS is drilling a deep geologic test well to learn about the regional Floridan aquifer, which provides groundwater to the Hilton Head area.
End-of-month hydrologic condition reports for New York State [More info]
Site to locate most recent or archive reports for end-of-the-month hydrologic conditions with descriptions, data, charts, and maps giving an overview of water conditions during the month for the state of New York.
PDF Enhancement of USGS scientific investigations in Texas by using geophysical techniques, 2005-10 [More info]
Annotated bibliography describing the use of electromagnetic surveying to understand the characteristics of aquifers and how they work.
PDF Examination of brine contamination risk to aquatic resources from petroleum development in the Williston Basin [More info]
Wetlands and oil wells shouldn't mix, but in some areas they do. This explains what problems may arise and how we study the effects of highly salty water produced by oil wells when it leaks into nearby wetlands and streams.
PDF Extreme drought to extreme floods: summary of hydrologic conditions in Georgia, 2009 [More info]
Discusses the nature and extent of extreme hydrologic events, with supporting observations of the water conditions and their effects on human activities.
PDF Geochemistry of the Arbuckle-Simpson Aquifer [More info]
Describes the geographic extent, quality, origin, and dynamic character of this aquifer located in south central Oklahoma.
Ground-water data for the Nation [More info]
National Water Information System (NWIS) real-time data on selected ground water sites, ground water level data, site inventory of wells, test holes, drains, springs and excavations and ground water-quality data for the United States.
PDF Hydrologic conditions in Georgia, 2010 [More info]
Georgia has recently seen a lot of extreme weather events triggering widespread flooding. This summary of streamflow and discharge from selected locations shows graphically the conditions during 2010.
Land Subsidence in the United States [More info]
Describes and provides examples of impacts of human-induced land subsidence resulting from the extraction of subsurface water, including aquifer-system compaction, drainage of organic soils, dissolution and collapse of susceptible rocks.
Maps of the distribution and occurrence of ground water quality constituents and early 1970's land use in New Jersey [More info]
Links to maps of New Jersey showing nitrate levels, pesticides, Total Volatile Organic Compounds (VOCs), and radium in wells and land use of the 1970s.
PDF Quantifying effects of climate change on the snowmelt-dominated groundwater resources of northern New England [More info]
Planned analysis of the sensitivity of groundwater levels to changes in air temperature and precipitation. Changes in groundwater recharge and discharge also will be correlated with other hydrologic indicators.
PDF Review of flow rate estimates of the Deepwater Horizon oil spill [More info]
We assess the degree to which a consensus was reached on the flow rate of the well by comparing in situ observations with a time-dependent flow rate model derived from pressure readings taken after the Macondo well was shut in for the well integrity test.
Statewide observation well network in Pennsylvania [More info]
In 1931, the USGS established a statewide network of wells in Pennsylvania to monitor water-level fluctuations. This network consists of 68 wells to monitor ground water conditions during droughts. Links to ground-water data, hydrographs, and levels.
Taming of a wild research well in Yellowstone National Park during November 1992 [More info]
A valve failed in a research well, causing an uncontrolled eruption of steam and hot water. Video program shows technical problems encountered in controlling and capping the well.
USGS / Department of Energy cooperative studies in Nevada [More info]
Describes cooperation of the USGS office in Las Vegas, Nevada, with the Department of Energy to address environmental and scientific issues at the Nevada Test Site and vicinity with links to project information.
USGS responds to Deepwater Horizon oil spill [More info]
Imagery, sampling information, and other data intended for use in assessing and remediating environmental problems related to the oil spill in the Gulf of Mexico in 2010
Water quality well sites in New Jersey [More info]
Map of New Jersey showing the locations of all well sites where ground water-quality data exists in the USGS National Water Information System (NWIS) database.
Water resources [More info]
Hydrologic and water-quality information with access to water data, publications, and maps, as well as to recent water projects and events.
PDF Wyoming groundwater-quality monitoring network [More info]
Shows high-priority areas where groundwater will be monitored, outlines the methods of collection and analysis that will be used.
Yakima River Basin [More info]
Description of the studies of the ground water system in the Yakima River Basin and how it interacts with rivers and streams in the basin. Includes links to project status, datasets, maps, project summaries, news releases and bibliographies.
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