Publications
Dive into our publications and explore the science from the Environmental Health Program (Toxic Substances Hydrology and Contaminant Biology).
GeoHEALTH-USGS Newsletter
GeoHEALTH-USGS Newsletter
The GeoHEALTH–USGS Newsletter—published since 2004—provides information on USGS science activities pertinent to safeguarding the health of fish, wildlife, domesticated animals, and people from environmental exposures to contaminants and pathogens.
Featured Science Activities
Featured Science Activities
Lean about our Featured Science Activities through our pages that highlight science studies, publications, and results.
Filter Total Items: 3785
Influence of redox environment and aqueous speciation on metal transport in groundwater: Preliminary results of tracer injection studies Influence of redox environment and aqueous speciation on metal transport in groundwater: Preliminary results of tracer injection studies
No abstract available.
Authors
J. Davis, Kent D. Becher, B.A. Rea, A.S. Maest, S. P. Garabedian
Modelling within the stream-catchment continuum Modelling within the stream-catchment continuum
No abstract available.
Authors
Kenneth E. Bencala, John H. Duff, Judson W. Harvey, A. P. Jackman, F.J. Triska
Scales in chemical hydrogeology: A historical perspective Scales in chemical hydrogeology: A historical perspective
No abstract available.
Authors
W. Back, Mary Jo Baedecker, W. Wood
Tracer-dilution experiments and solute-transport simulations for a mountain stream, Saint Kevin Gulch, Colorado Tracer-dilution experiments and solute-transport simulations for a mountain stream, Saint Kevin Gulch, Colorado
No abstract available.
Authors
R. E. Broshears, K.E. Bencala, B. A. Kimball, Diane M. McKnight
Hydrogeologic data collected from a crude-oil spill site near Bemidji, Minnesota, 1983-91 Hydrogeologic data collected from a crude-oil spill site near Bemidji, Minnesota, 1983-91
The U.S. Geological Survey began a research project at the site of a crude oil spill near Bemidji, Minnesota in 1983. The project is part of the U.S. Geological Survey's Toxic Substances Hydrology Program. The objectives of research at this site are to obtain an understanding of the mobilization, transport, and fate of petroleum derivatives in the shallow subsurface and to use this...
Authors
S. E. Smith, M. F. Hult
Impact of the Summitville Mine on irrigation water, agricultural soils, and alfalfa in the southwestern San Luis Valley, Colorado Impact of the Summitville Mine on irrigation water, agricultural soils, and alfalfa in the southwestern San Luis Valley, Colorado
No abstract available.
Authors
J. A. Erdman, K. S. Smith
Effects of focused recharge on the transport of agricultural chemicals at the Princeton, Minnesota Management Systems Evaluation Area, 1991-92 Effects of focused recharge on the transport of agricultural chemicals at the Princeton, Minnesota Management Systems Evaluation Area, 1991-92
Rates of water movement through the unsaturated zone greatly affect the amount and concentrations of agricultural chemicals that may reach the water table. For example, recharge can flush chemicals to the water table which have accumulated in the unsaturated zone during dry periods. A better understanding of how topography influences recharge and the movement of agricultural chemicals is...
Authors
G. N. Delin, M.K. Landon
Particulate organic matter in the San Francisco Bay estuary, California: Chemical indicators of its origin and assimilation into the benthic food web Particulate organic matter in the San Francisco Bay estuary, California: Chemical indicators of its origin and assimilation into the benthic food web
No abstract available.
Authors
J. E. Cloern, E. A. Canuel, S.M. Wienke
U. S. Geological Survey Toxic Substances Hydrology Program--Abstracts of the Technical Meeting, Colorado Springs, Colorado, September 20-24, 1993 U. S. Geological Survey Toxic Substances Hydrology Program--Abstracts of the Technical Meeting, Colorado Springs, Colorado, September 20-24, 1993
No abstract available.
Authors
David W. Morganwalp, David A. Aronson
New reference materials for nitrogen-isotope-ratio measurements New reference materials for nitrogen-isotope-ratio measurements
Three new reference materials were manufactured for calibration of relative stable nitrogen‐isotope‐ratio measurements: USGS25 (ammonium sulfate) δ615″=−30 per mil USGS26 (ammonium sulfate) δ615″=+54 per mil USGS32 (potassium nitrate) δ615″=+180 per mil where δN′, relative to atmospheric nitrogen, is an approximate value subject to change following interlaboratory comparisons. These...
Authors
J.K. Bohlke, C. J. Gwinn, T. B. Coplen
An efficient numerical solution of the transient storage equations for solute transport in small streams An efficient numerical solution of the transient storage equations for solute transport in small streams
Several investigators have proposed solute transport models that incorporate the effects of transient storage. Transient storage occurs in small streams when portions of the transported solute become isolated in zones of water that are immobile relative to water in the main channel (e.g., pools, gravel beds). Transient storage is modeled by adding a storage term to the advection...
Authors
Robert L. Runkel, Steven C. Chapra