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
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.
Science Feature Articles
- Non-invasive flow path characterization in a mining-impacted wetland: Bethune, J., Randell, J., Runkel, R.L., and Singha, K., 2015, Journal of Contaminant Hydrology, v. 183, p. 29-39, doi:10.1016/j.jconhyd.2015.10.002.
- Hydrogeochemical effects of a bulkhead in the Dinero mine tunnel, Sugar Loaf mining district, near Leadville, Colorado: Walton-Day, K., and Mills, T.J., 2015, Applied Geochemistry, doi:10.1016/j.apgeochem.2015.03.002 (In Press, Corrected Proof).
- Predicting characteristics of rainfall driven estrogen runoff and transport from swine AFO spray fields: Lee, B., Kullman, S.W., Yost, E.E., Meyer, M.T., Worley-Davis, L., Williams, C.M., and Reckhow, K.H., 2015, Science of the Total Environment, v. 532, p. 571-580, doi:10.1016/j.scitotenv.2015.06.051.
- Reactive transport modeling of geochemical controls on secondary water quality impacts at a crude oil spill site near Bemidji, MN: Ng, G.H.C., Bekins, B.A., Cozzarelli, I.M., Baedecker, M.J., Bennett, P.C., Amos, R.T., and Herkelrath, W.N., 2015, Water Resources Research, v. 51, no. 6, p. 4156-4183, doi:10.1002/2015WR016964.
- 1DTempPro V.2--New features for parameter estimation, heterogeneity, and time-varying exchange: Koch, F.W., Voytek, E.B., Day-Lewis, F.D., Healy, R., M.A., B., Lane, J.W., and Werkema, D., 2015, Groundwater, doi:10.1111/gwat.12369 (Advanced Web release).