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The USGS sampled streams in Montgomery County as part of a study done in cooperation with the Montgomery County Commissioners. The sampling program was designed by the Montgomery County Sanitarian and USGS hydrologists. The program focused on assessing general surface-water quality throughout the county and also targeted some specific areas...

No abstract available....

The authors conducted limited site surveys in the Wildhorse and Burbank oilfields on the Osage Indian Reservation, northeastern Oklahoma. The purpose was to document salt scarring, erosion, and soil and water salinization, to survey for radioactivity in oilfield equipment, and to determine if trace elements and naturally occurring radioactive materials...

This report documents the geographic information system map layers and data files generated for the Santa Clara-Calleguas Basin, Ventura County, as part of a Regional Aquifer- System Analysis of southern California from 1989 to 1995. Thirty-six map layers and four data files are maintained in this geographic information system data...

A study was conducted by the U.S. Geological Survey and the U.S. Environmental Protection Agency to define the geohydrology and contaminant distribution at a Superfund site near Byron, Illinois. Geologic units of interest beneath the site are the St. Peter Sandstone; the shale, dolomite and sandstone of the Glenwood Formation;...

A method for analyzing and interpreting travel times of solutes in heterogeneous aquifers is presented based on the peak concentration arrival times as measured at various samplers in the aquifer. The method allows separation of the effects of pore-scale dispersion from the effects of the large-scale aquifer heterogeneity. An analysis...

Safe drinking-water supplies are critical to maintaining and preserving public health. Although the Nation's drinking water is generally safe, natural and introduced contaminants in water supplies throughout the country have adversely affected human health. This new U.S. Geological Survey (USGS) initiative will provide information on the vulnerability of water supplies...

The United States energy industry faces the challenge of satisfying our expanding thirst for energy while protecting the environment. This challenge is magnified by the increasing volumes of saline water produced with oil and gas in the Nation's aging petroleum fields. Ultimately, energy-producing companies are responsible for disposing of these...

High rates of coastal land loss in Louisiana have prompted efforts to maintain or restore coastal wetland habitats, and structural management of marsh hydrology is one of a number of approaches that has been adopted. The aim of this study was to determine the effect of hydrologic management measures on...

This data set consists of digital data and accompanying documentation of the 1:250,000-scale Enid quadrangle, Oklahoma. The original data are from the Geologic Map, sheet 1 of 4, included in Oklahoma Geological Survey publication, Reconnaissance of the water resources of the Enid quadrangle, north-central Oklahoma, Hydrologic Atlas 7, Bingham and...

This data set consists of digital data and accompanying documentation of the surficial geology of the 1:250,000-scale Fort Smith quadrangle, Oklahoma. The original data are from the Geologic Map, sheet 1 of 4, included in the Oklahoma Geological Survey publication, Reconnaissance of the water resources of the Fort Smith quadrangle,...

This data set consists of digital data and accompany documentation for the surficial geology of Cimarron County, Oklahoma. The original data are from the Geohydrologic Map, sheet 1 of 3, included in the U.S. Geological Survey publication, 'Reconnaissance of the ground-water resources in Cimarron County, Oklahoma', Hydrologic Investigations Atlas 373,...

This report documents the development of a computer model to simulate steady-state (long-term average) flow of ground water in the vicinity of Mirror Lake, which lies at the eastern end of the Hubbard Brook valley in central New Hampshire. The 10-km2 study area includes Mirror Lake, the three streams that...

This data set consists of digital data and accompanying documentation of the surficial geology of the 1:250,000-scale Oklahoma City quadrangle, Oklahoma. The original data are from the Geologic Map, sheet 1 of 4, included in the Oklahoma Geological Survey publication, 'Reconnaissance of the water resources of the Oklahoma City quadrangle,...

This data set consists of digital data and accompanying documentation of the surficial geology of the 1:250,000-scale Ardmore and Sherman quadrangles, Oklahoma. The original data are from the Geologic Map, sheet 1 of 4, included in the Oklahoma Geological Survey publication, Reconnaissance of the water resources of the Ardmore and...

This data set consists of digital data and accompanying documentation for the surficial geology of the 1:250,000-scale Clinton quadrangle. The original data are from the Geologic Map, sheet 1 of 4, included in the Oklahoma Geological Survey publication, Reconnaissance of the water resources of the Clinton quadrangle, west-central Oklahoma, Hydrologic...

A steady-state, three-dimensional flow model coupled with a particle-tracking algorithm was developed to assess the complex interaction of hydrogeologic conditions affecting ground-water flow and contaminant transport--including aquifer heterogeneities, hydrologic boundaries such as ponds and streams, ground-water withdrawals, and aquifer recharge to characterize the migration of contaminants emanating from beneath the...

This data set consists of digital data and accompanying documentation for the surficial geology of Beaver County, Oklahoma. The original data are from the Hydrogeologic Map, sheet 1 of 3, included in the U.S. Geological Survey publication, Reconnaissance of the Water Resources of Beaver County, Oklahoma, Hydrologic Investigations Atlas HA-450,...

The study area, a metropolitan area in southeast Texas about 45 miles north of the Gulf of Mexico, has been undergoing extensive urban development since the 1950s. The Houston Urban Runoff Program was begun by the U.S. Geological Survey in water year 1964 to define the magnitude and frequency of...

This compact disc contains 25 digital map data sets covering the State of Oklahoma that may be of interest to the general public, private industry, schools, and government agencies. Fourteen data sets are statewide. These data sets include: administrative boundaries; 104th U.S. Congressional district boundaries; county boundaries; latitudinal lines; longitudinal...

This data set consists of digital data and accompanying documentation for the surficial geology of Texas County, Oklahoma. The original data are from the Hydrogeologic Map, sheet 1 of 3, included in the U.S. Geological Survey publication, Availability of ground water in Texas County, Oklahoma, Hydrologic Investigations Atlas HA-250, Wood...

Analysis of water collected during August and September 1993 from well PM-2, on Pahute Mesa at\x11the Nevada Test Site, indicated tritium concentrations of\x1121,000 Bq/L at 610 m below land surface. The Schooner event (U-20u) was detonated in 1968 approximately 270 meterssoutheast of well PM-2 at a working...

Flow variability plays a central role in structuring the physical environment of riverine ecosystems. However, natural variability in flows along many rivers has been modified by water management activities. We quantified the relationship between flow and establishment of the dominant tree (plains cottonwood, Populus deltoides subsp. monilifera) along one of the least hydrologically...