USGS: Science Topics: aquifers

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Aquifers

Bodies of rock that contain sufficient saturated permeable material to conduct ground water and to yield significant quantities of water to wells and springs. [Glossary of Geology, 4th ed.]

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Pesticides in Ground Water of Wyoming, 1995-2006 [More info]: Summarizes ground-water pesticide monitoring results, shows vulnerability of aquifers to contamination.
Phosphorus and groundwater: Establishing links between agricultural use and transport to streams [More info]: Explains why phosphorus is important, how it moves through the terrestrial water system, how we measure it, and what this means for people who need to manage or monitor human activities that produce it.
Principal aquifers can contribute radium to sources of drinking water under certain geochemical conditions [More info]: Knowledge of the geochemical processes controlling radium occurrence in groundwater may help water-resource managers anticipate and minimize human exposure to this cancer-causing element.
Redox Conditions in Selected Principal Aquifers of the United States [More info]: Summarizes measurements of ground-water chemistry that affect the vulnerability of aquifers to contamination. Data are from aquifers throughout the conterminous US and Alaska.
SEAWAT: A Computer Program for Simulation of Variable-Density Groundwater Flow and Multi-Species Solute and Heat Transport [More info]: Software based on the MODFLOW modeling framework, used for studies of saltwater intrusion coastal aquifers, storage and recovery in brackish limestone aquifers, and brine migration in continental aquifers.
Science to support the understanding of south Texas surface-water and groundwater resources in a changing landscape [More info]: Short descriptions of the research and monitoring activities we are carrying out to assist state, local, and Federal agencies dealing with water resource issues in the southern part of the state.
Southwest Principal Aquifers Regional Ground-Water Quality Assessment [More info]: Study of the susceptibility and vulnerability of basin-fill aquifers in the region to ground-water contamination by synthesizing the information on ground-water quality conditions in 15 basins from previous studies.
Sustainability of natural attenuation of nitrate in agricultural aquifers [More info]: Nitrate from fertilizer is degraded by microbial action in the presence of solid minerals. This helps mitigate the effect of the nitrate, but begins to diminish the solid minerals needed. Will the process be sustainable in the long term?
Trichloroethylene (TCE) in fractured bedrock, Naval Air Warfare Center, Trenton, N.J. [More info]: Research on contamination by trichloroethylene (TCE) in fractured rock at the Naval Air Warfare Center in Trenton, N.J. with links to site description, bibliography, online reports, and findings.
USGS develops geophysical methods to improve remediation monitoring and site characterization [More info]: Short news article describing the use of electrical resistivity tomography to improve imaging of tracer flow in ground water.

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