Other Fundamental Research and Methods Development

The Toxics Program supports the development of knowledge and methods for the collection, analysis, and interpretation of data related to fundamental questions about contamination in the hydrologic cycle. What is the significance of these activities in relation to the field investigations?

Microbial Geochemistry

• Organic Compounds in Near-Surface Environments: Understanding Fate in a Changing Biogeochemical Landscape
• Microbiology and Molecular Ecology of Biogeochemical Cycles in Aquatic Environments
• Multiphase Flow, Transport, Reaction and Biodegradation
• Bacteria - Contaminant Interactions

Geochemistry

• The Reston Chlorofluorocarbon Laboratory
• Reston SF₆ Analysis
• Aqueous Crystal Growth and Dissolution Kinetics of Earth Surface Materials
• Geochemical Studies at the Norman Landfill
• Analytical Environmental Trace Element Chemistry and Its Impact on Water Quality
• Organic Geochemistry Research Group
• Isotope Tracers of Biogeochemical and Hydrologic Processes
• Isotope Tracers Project, Research on the application of environmental isotopes in hydrology, geology, and biology

Hydrology

• Unsaturated Zone Field Studies -- Unsaturated Zone Transport Models
• Unsaturated Zone Flow Project
• Shingobee Headwaters Aquatic Ecosystems Project - watershed-scale research from a scientifically panoramic perspective
• Multiphase Flow, Transport, Reaction and Biodegradation
• Transport Phenomena in Fractured Rock
• Hydrology of Fractured Rocks
• Toxics Program - Metal Release, Transport, and Attenuation in Mined Areas: Mechanisms and Implications for Remediation and Land-Use Strategies

Contaminant Geophysics

• Branch of Geophysics Toxics Program Research
• Borehole Geophysics as Applied to Geohydrology
• Toxics Program Geophysics Project
• Ground Penetrating Radar (GPR) Fundamental Research

Modeling

• Precipitation - Runoff Modeling of Watershed Systems
• Solute Transport Simulation in Ground-Water Systems
• Application of Stochastic Processes in Hydrogeology
• Reaction-Transport Modeling In Ground-Water Systems
• USGS Ground Water Software
• Mathematical Simulation of Subsurface-Water Flow Using Uncertain and Incomplete Data