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.
Maps of three ground-water monitoring networks that group related wells and data from active well networks, and provide basic statistics about the water-level data collected by USGS.
Map showing a network of selected ground water wells in the U.S. The water levels in these wells are used to monitor the effects of droughts and other climate variability.
Results of ground-surface monitoring and borehole water table measurements document subsidence of the land surface correlative with changes in the ground water.
The study of petroleum in both the saturated and unsaturated zones, to better understand the processes that control contaminant behavior, and to use this understanding to estimate the future behavior of the contaminants.
Detailed measurements of elevation help to understand the extent and severity of subsidence. Study asks if subsidence indicates the aquifer system is compacting temporarily or permanently, and are the changes human-induced or tectonic.
Site describes studies using flow visualization and rock matrix pressure measurements to study flow through fractures in the unsaturated zone, which plays an important role in water infiltration and contaminant transport.
This site provides information on investigations of hydrocarbons in the unsaturated zone and shallow ground water at a gasoline-spill site in Galloway Township, N.J., with links to research projects, mathematical models, and photos.
U.S. Department of the Interior |
U.S. Geological Survey