The USGS Toxic Substances Hydrology (Toxics) Program develops computer simulation and statistical models as an
integral part of the Program's field investigations. The increased knowledge
gained from the development and application of models greatly enhances the transfer value of research conducted
at the Toxics Program’s research sites and can have a significant effect on decisions related to human and
environmental exposure and remedial alternatives. Information on the types of
simulation and statistical models used by the program is available. The information presented on this page
cuts across lines drawn by individual investigations and projects so that information on the development of
models can be presented in one place.
Investigations and Research Activities
- Surface Water Modeling
- Ground Water Modeling
Fact Sheets
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![MOC3D simulation of MTBE at the Laurel Bay, S.C., research site, based on field and lab data of Landmeyer and others (1998); MTBE in 1994 and 1998; 1998 color map shows simulated concentration ranging from 0 to 10,000 parts per billion (ppb); contours show 100, 1,000, and 10,000 ppb concentration levels.](https://webarchive.library.unt.edu/web/20090506153134im_/http://toxics.usgs.gov/images/MTBE_sim_s.jpg)
MOC3D simulation of MTBE at the Laurel Bay,
SC, research site, based on field and lab data of Landmeyer and others (1998); MTBE in 1994 and 1998; 1998
color map shows simulated concentration ranging from 0 to 10,000 parts per billion (ppb); contours show 100,
1,000, and 10,000 ppb concentration levels.
(Click on Image for a Larger Version)
Headlines
Bibliographies
New Publications
Upcoming Publications
- Reactive solute-transport simulation of pre-mining metal concentrations in mine-impacted catchments--Redwell Basin, Colorado, USA: Kimball, B.A., Runkel, R.L., Wanty, R.B., and Verplanck, P.L., Chemical Geology (IN PRESS).
- Mercury sources, distribution and bioavailability in the North Pacific Ocean--Insights from data and models: Sunderland, E.M., Krabbenhoft, D.P., Moreau, J.W., Strode, S.A., and Landing, W.M., Global Biogeochemical Cycles, doi:10.1029/2008GB003425 (IN PRESS).
- Use of inverse modeling methods to improve ground-water-modeling calibration and evaluate model-prediction uncertainty, Camp Edwards, Cape Cod, Massachusetts: Walter, D.A., and LeBlanc, D.R., U.S. Geological Survey Scientific Investigations Report 2007-5257 (IN PRESS).
- Interpretation of a transient storage model of stream solute transport applied to overlapping spatial scales: Gooseff, M.N., Briggs, M.A., Bencala, K.E., McGlynn, B.L., and Scott, D.T., Limnology and Oceanography--Methods (IN PRESS).
- One-dimensional transport with equilibrium chemistry (OTEQ)--A reactive transport model for streams and rivers: Runkel, R.L., U.S. Geological Survey Techniques and Methods book 6, chapter B6, 102 p (IN PRESS).
Newly Published
- Mercury sources, distribution, and bioavailability in the North Pacific Ocean--Insights from data and models: Sunderland, E.M., Krabbenhoft, D.P., Moreau, J.W., Strode, S.A., and Landing, W.M., 2009, Global Biogeochemical Cycles, v. 23, no. 2, p. 1-14, GB2010, doi:10.1029/2008GB003425.
- Effects of simplifying fracture network representation on inert chemical migration in fracture-controlled aquifers: Wellman, T.P., Shapiro, A.M., and Hill, M.C., 2009, Water Resources Research, v. 45, no. 1, W01416, doi:10.1029/2008WR007025.
- Multi-scale measurements and modeling of denitrification in streams with varying flow and nitrate concentration in the Upper Mississippi River Basin, USA: Böhlke, J.K., Antweiler, R.C., Harvey, J.W., Laursen, A.E., Smith, L.K., Smith, R.L., and Voytek, M.A., 2009, Biogeochemistry, v. 93, p. 117-141, doi:10.1007/s10533-008-9282-8 (Advanced Web release).
- Use of inverse modeling methods to improve ground-water-modeling calibration and evaluate model-prediction uncertainty, Camp Edwards, Cape Cod, Massachusetts: Walter, D.A., and LeBlanc, D.R., 2008, U.S. Geological Survey Scientific Investigations Report 2007-5257.
- Shallow water processes govern system-wide phytoplankton bloom dynamics--A modeling study: Lucas, L.V., Koseff, J.R., Monismith, S.G., and Thompson, J.K., 2008, Journal of Marine Systems, v. 75, no. 1-2, p. 70-86 doi:10.1016/j.jmarsys.2008.07.011.
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