Environmental Health

Publications

Dive into our publications and explore our science.

View Our Bibliography

GeoHEALTH-USGS Newsletter

GeoHEALTH-USGS Newsletter

The GeoHEALTH-USGS Newsletter provides information on new USGS science activities related to safeguarding the health of fish, wildlife, domesticated animals, livestock, and people from environmental exposures to contaminants and pathogens.

Get the Newsletter

Featured Science Activities

Featured Science Activities

Lean about our Featured Science Activities through our pages that highlight recience studies, publications, and results.

Get Science
Filter Total Items: 3,223
Publication Thumbnail
Year Published: 1993

Sorption of N2 and EGME vapors on some soils, clays, and mineral oxides and determination of sample surface areas by use of sorption data

Vapor sorption isotherms of ethylene glycol monoethyl ether (EGME) at room temperature and isotherms of N2 gas at liquid nitrogen temperature were determined for various soils and minerals. The N2 monolayer capacities [Qm (N2)] were calculated from the BET equation and used to determine the surface areas. To examine whether EGME is an appropriate...

Chiou, C.T.; Rutherford, D.W.; Manes, M.
Sorption of N2 and EGME vapors on some soils, clays, and mineral oxides and determination of sample surface areas by use of sorption data; 1993; Article; Journal; Environmental Science and Technology; Chiou, C. T.; Rutherford, D. W.; Manes, M.

Publication Thumbnail
Year Published: 1993

Spatial variability of triazine herbicides in the Lower Mississippi River

No abstract available. 

Moody, J.A.; Goolsby, D.A.
Spatial variability of triazine herbicides in the Lower Mississippi River; 1993; Article; Journal; Environmental Science and Technology; Moody, J. A.; Goolsby, D. A.

Publication Thumbnail
Year Published: 1993

Stable isotope enrichment in paleowaters of the southeast Atlantic coastal plain, United States

Paleowaters from the Floridan aquifer system in the southeastern Atlantic coastal plain have higher D/H and 18O/16O ratios than local Holocene ground water. Maximum δ18O enrichments in ground water having adjusted radiocarbon ages of 20,000 to 26,000 years are 0.7 to 2.3 per mil. The trend in isotopic enrichment in paleowaters is the reverse...

Plummer, Niel
Stable isotope enrichment in paleowaters of the southeast Atlantic coastal plain, United States; 1993; Article; Journal; Science; Plummer, L. N.

Publication Thumbnail
Year Published: 1993

Surface chemistry of ferrihydrite: Part 1. EXAFS studies of the geometry of coprecipitated and adsorbed arsenate

EXAFS spectra were collected on both the As and Fe K-edges from samples of two-line ferrihydrite with adsorbed (ADS) and coprecipitated (CPT) arsenate prepared over a range of conditions and arsenate surface coverages. Spectra also were collected for arsenate adsorbed on the surfaces of three FeOOH crystalline polymorphs, α (goethite), β (...

Waychunas, G.A.; Rea, B.A.; Fuller, C.C.; Davis, J.A.
Surface chemistry of ferrihydrite: Part 1. EXAFS studies of the geometry of coprecipitated and adsorbed arsenate; 1993; Article; Journal; Geochimica et Cosmochimica Acta; Waychunas, G. A.; Rea, B. A.; Fuller, C. C.; Davis, J. A.

Publication Thumbnail
Year Published: 1993

Surface chemistry of ferrihydrite: Part 2. Kinetics of arsenate adsorption and coprecipitation

The kinetics of As(V) adsorption by ferrihydrite was investigated in coprecipitation and postsynthesis adsorption experiments conducted in the pH range 7.5-9.0. In coprecipitation experiments, As(V) was present in solution during the hydrolysis and precipitation of iron. In adsorption experiments, a period of rapid (<5 min) As(V) uptake from...

Fuller, C.C.; Dadis, J.A.; Waychunas, G.A.
Surface chemistry of ferrihydrite: Part 2. Kinetics of arsenate adsorption and coprecipitation; 1993; Article; Journal; Geochimica et Cosmochimica Acta; Fuller, C. C.; Dadis, J. A.; Waychunas, G. A.

Publication Thumbnail
Year Published: 1993

The effect of streambed topography on surface-subsurface water exchange in mountain catchments

A numerical hydrological simulation suggested that water exchange between stream channels and adjacent aquifers is enhanced by convexities and concavities in streambed topography. At St. Kevin Gulch, an effluent stream in the Rocky Mountains of Colorado, subsurface hydraulic gradients and movement of ionic tracers indicated that stream water was...

Harvey, Judson W.; Bencala, Kenneth E.

Publication Thumbnail
Year Published: 1993

The role of water exchange between a stream channel and its hyporheic zone in nitrogen cycling at the terrestrial-aquatic interface

The subsurface riparian zone was examined as an ecotone with two interfaces. Inland is a terrestrial boundary, where transport of water and dissolved solutes is toward the channel and controlled by watershed hydrology. Streamside is an aquatic boundary, where exchange of surface water and dissolved solutes is bi-directional and flux is strongly...

Triska, F.J.; Duff, J.H.; Avanzino, R.J.
The role of water exchange between a stream channel and its hyporheic zone in nitrogen cycling at the terrestrial-aquatic interface; 1993; Article; Journal; Hydrobiologia; Triska, F. J.; Duff, J. H.; Avanzino, R. J.

Publication Thumbnail
Year Published: 1993

Tidal, Residual, Intertidal Mudflat (TRIM) Model and its Applications to San Francisco Bay, California

A numerical model using a semi-implicit finite-difference method for solving the two-dimensional shallow-water equations is presented. The gradient of the water surface elevation in the momentum equations and the velocity divergence in the continuity equation are finite-differenced implicitly, the remaining terms are finite-differenced explicitly...

Cheng, R.T.; Casulli, V.; Gartner, J.W.
Tidal, Residual, Intertidal Mudflat (TRIM) Model and its Applications to San Francisco Bay, California; 1993; Article; Journal; Estuarine, Coastal and Shelf Science; Cheng, R. T.; Casulli, V.; Gartner, J. W.

Publication Thumbnail
Year Published: 1993

Trace contaminants and nutrients in estuaries: The importance of process interdependence

No abstract available.

Kuwabara, J.S.; Baker, J.E.
Trace contaminants and nutrients in estuaries: The importance of process interdependence; 1993; Article; Journal; Estuaries; Kuwabara, J. S.; Baker, J. E.

Publication Thumbnail
Year Published: 1993

Trace metals (Cd, Cu, Ni, and Zn) and nutrients in coastal waters adjacent to San Francisco Bay, California

Samples collected in December 1990 and July 1991 show that dissolved Cd, Cu, Ni, and Zn distributions in the Gulf of the Farallones are dominated by mixing of two end-members: (1) metal-enriched San Francisco Bay water and (2) offshore California Current water. The range of dissolved metal concentrations observed is 0.2–0.9 nmol kg−1 for Cd,...

VanGeen, A.; Luoma, Samuel N.
Trace metals (Cd, Cu, Ni, and Zn) and nutrients in coastal waters adjacent to San Francisco Bay, California; 1993; Article; Journal; Estuaries; van, Geen, A.; Luoma, S. N.

Publication Thumbnail
Year Published: 1993

Using borehole geophysics and cross-borehole flow testing to define hydraulic connections between fracture zones in bedrock aquifers

Nearly a decade of intensive geophysical logging at fractured rock hydrology research sites indicates that geophysical logs can be used to identify and characterize fractures intersecting boreholes. However, borehole-to-borehole flow tests indicate that only a few of the apparently open fractures found to intersect boreholes conduct flow under...

Paillet, Frederick L.
Using borehole geophysics and cross-borehole flow testing to define hydraulic connections between fracture zones in bedrock aquifers; 1993; Article; Journal; Journal of Applied Geophysics; Paillet, F. L.

Publication Thumbnail
Year Published: 1992

Deposition of aerially applied BT in an oak forest and its prediction with the FSCBG model

Data are provided from 17 single-swath aerial spray trials that were conducted over a fully leafed, 16-m tall, mixed oak forest. The distribution of cross-swath spray deposits was sampled at the top of the canopy and below the canopy. Micrometeorological conditions were measured above and within the canopy during the spray trials. The USDA Forest...

Anderson, Dean E.; Miller, David R.; Wang, Yansen; Yendol, William G.; Mierzejewski, Karl; McManus, Michael L.