USGS Water Resources: National Research Program (NRP) Current Topics

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Areas of Investigation: Current Research Topics

Acid Mine Drainage
- Hydrologic, Ecological, and Biogeochemical Processes in Flowing Waters (Harvey/Larsen)
- Ground-Water Solute-Transport Simulation (Kipp/Stollenwerk)
- Chemical Modeling of Acid Waters (Nordstrom/McCleskey)
- Mechanisms of biological and ecological response in disturbed aquatic ecosystems (Thompson//Brown/Cain/Carter/Fend/Hornberger/Stewart/Luoma)
Aquatic Habitat
- Plankton Dynamics in Tidal Estuaries (Cloern/Lucas)
- Hydrologic, Ecological, and Biogeochemical Processes in Flowing Waters (Harvey/Larsen)
- Vegetation and Hydrogeomorphic Relations (Hupp/Noe/Rybicki)
- Environmental Fluid Dynamics (Nelson/Simoes)
- Characterization of Biotic and Biogeochemical Interactions at Environmental Interfaces (Striegl/Schuster/Walvoord)
- Mechanisms of biological and ecological response in disturbed aquatic ecosystems (Thompson//Brown/Cain/Carter/Fend/Hornberger/Stewart/Luoma)
- Landscape Change in the Southwest (Webb)
Arid Land Hydrologic Studies
- Biotic Response to Climatic Variability and Human Impacts in Arid Lands (Betancourt)
- Arid Regions Climate (Benson)
- Environmental Tracers of Surface-Water / Ground Water Interactions (Constantz/Stonestrom)
- Regional Groundwater Flow and Transport (Sanford)
- Characterization of Biotic and Biogeochemical Interactions at Environmental Interfaces (Striegl/Schuster/Walvoord)
- Field Applications of Unsaturated Zone Flow Theory (Weeks/Anderson/Healy/Stannard/Tindall)
- Landscape Change in the Southwest (Webb)
Carbon Cycle
- Organic Carbon Migration in Aquatic Environments (Aiken/Thorn/Wickland)
- Biotic Response to Climatic Variability and Human Impacts in Arid Lands (Betancourt)
- Plankton Dynamics in Tidal Estuaries (Cloern/Lucas)
- Physical Chemistry of Stable Isotope Fractionation in Hydrologic Processes (Coplen/Bohlke/Revesz)
- Vegetation and Hydrogeomorphic Relations (Hupp/Noe/Rybicki)
- Isotope Tracers of Biogeochemical and Hydrologic Processes (Kendall/Michel/Silva/)
- Biogeochemistry at Regional Scales (Marvin-DiPasquale)
- Microbial Biogeochemistry of Aquatic Environments (Oremland/Miller)
- Aqueous crystal growth and dissolution kinetics of earth surface minerals (Reddy)
- Organic Nitrogen and Organic Carbon in Hydrologic Systems (Rostad/Rutherford)
- Biogeochemistry of Carbon and Nitrogen in Aquatic Environments (Smith)
- Sediment-Water Chemistry in Large River Systems: Biogeochemical, Geomorphic, and Human Controls (Stallard/Martin)
- Characterization of Biotic and Biogeochemical Interactions at Environmental Interfaces (Striegl/Schuster/Walvoord)
- Carbon Fluxes in Hydrologic and Geologic Processes (Sundquist)
- Field Applications of Unsaturated Zone Flow Theory (Weeks/Anderson/Healy/Stannard/Tindall)
Climate (see Hydroclimate )
Contaminant Reactions and Transport
- Organic Carbon Migration in Aquatic Environments (Aiken/Thorn/Wickland)
- Chemical Transformations in Water Reclamation and Reuse (Barber)
- Biogeochemical Controls on Organic Contaminant Degradation in Heterogeneous Near Surface Environments (Cozzarelli)
- Physical Chemistry of Stable Isotope Fractionation in Hydrologic Processes (Coplen/Bohlke/Revesz)
- Partitioning of Solutes between Solid and Aqueous Phases (Kent/Fuller)
- Transport and Biogeochemical Fate of Organic Substances in Aquatic Environments (Eganhouse)
- Geochemistry of Clay-Water Reactions (Eberl/Blum)
- Multiphase flow, transport, reaction, and biodegradation (Essaid/Bekins/Curtis/Duff/Green/Herkelrath)
- Hydrologic, Ecological, and Biogeochemical Processes in Flowing Waters (Harvey/Larsen)
- Interaction of Bacteria with Environmental Contaminants and Solid Surfaces in the Aquatic Environment (Harvey/Metge)
- Vegetation and Hydrogeomorphic Relations (Hupp/Noe/Rybicki)
- Isotope Tracers of Biogeochemical and Hydrologic Processes (Kendall/Michel/Silva)
- Ground-Water Solute-Transport Simulation (Kipp/Stollenwerk)
- Digital Modeling of Transport in the Saturated Zone (Konikow)
- Solute Transport Involving Biological Processes in Surface Waters (Kuwabara)
- Hydrogeochemical and Microbiological Investigations of Radionuclides, Nutrients, and Environmental Contaminants. (Landa/Jones/Kraemer)
- Hydrogeochemical and Biogeochemical Studies of Volcanic and Geothermal Systems (Mariner/Evans)
- Biogeochemistry at Regional Scales (Marvin-DiPasquale)
- Chemical Modeling of Acid Waters (Nordstrom/McCleskey)
- Microbial Biogeochemistry of Aquatic Environments (Oremland/Miller)
- Reaction-Transport Modeling in Ground-Water Systems (Parkhurst/Riggs)
- Kinetics and Thermodynamics of Chemical Evolution in Ground-Water Systems (Plummer/Busenberg/Glynn)
- Organic Nitrogen and Organic Carbon in Hydrologic Systems (Rostad/Rutherford)
- Regional Groundwater Flow and Transport (Sanford)
- Biogeochemistry of Metals and Nutrients in Sediments (Simon)
- Biogeochemistry of Carbon and Nitrogen in Aquatic Environments (Smith)
- Mechanisms of biological and ecological response in disturbed aquatic ecosystems (Thompson//Brown/Cain/Carter/Fend/Hornberger/Stewart/Luoma)
- Investigations of Single and Multiphase Fluid Flow, Mass and Energy Transport, and Fluid Phase Change in Subsurface Environment (Voss)
- Ground-Water Monitoring Network Design (Wagner)
- Field Applications of Unsaturated Zone Flow Theory (Weeks/Anderson/Healy/Stannard/Tindall)
- Geochemical Reactions Between Water and Mineral Substrates (White/Bullen/Presser/Schulz/Vivit)
Estuaries and Near-Shore Environments
- Plankton Dynamics in Tidal Estuaries (Cloern/Cole)
- Transport and Biogeochemical Fate of Organic Substances in Aquatic Environments (Eganhouse)
- Solute Transport Involving Biological Processes in Surface Waters (Kuwabara)
- Biogeochemistry at Regional Scales (Marvin-DiPasquale)
- Geochemistry of Riverine and Estuarine Waters (Peterson/Cayan/Dettinger/Hostetler)
- Mechanisms of biological and ecological response in disturbed aquatic ecosystems (Thompson//Brown/Cain/Carter/Fend/Hornberger/Stewart/Luoma)
Evapotranspiration
- Continental Water, Climate, and Earth-System Dynamics (Milly/Eng)
- Hydrogeology of Lakes, Wetlands and Streams (Rosenberry)
- Field Applications of Unsaturated Zone Flow Theory (Weeks/Anderson/Healy/Stannard/Tindall)
Fire Effects on Watersheds
- Biotic Response to Climatic Variability and Human Impacts in Arid Lands (Betancourt)
- Erosion and Deposition Processes (Moody/Griffin)
- Organic Nitrogen and Organic Carbon in Hydrologic Systems (Rostad/Rutherford)
- Sediment-Water Chemistry in Large River Systems: Biogeochemical, Geomorphic, and Human Controls (Stallard/Martin)
Fractured Rock
- Hydrology of Fractured Rocks (Hsieh/Tiedeman)
- The Application of Geophysical Logging to Hydrogeological Investigations (Morin)
- Transport Phenomena in Fractured Rock (Shapiro)
- Investigations of Single and Multiphase Fluid Flow, Mass and Energy Transport, and Fluid Phase Change in the Subsurface Environment (Voss)
Geothermal Resources
- Hydrogeochemical and Biogeochemical Studies of Volcanic and Geothermal Systems (Mariner/Evans)
- Hydrologic Studies of Heat and Mass Transport (Ingebritsen/Hurwitz)
Ground-Water Flow, Transport, and Reactions
- Biogeochemical Controls on Organic Contaminant Degradation in Heterogeneous Near Surface Environments (Cozzarelli)
- Physical Chemistry of Stable Isotope Fractionation in Hydrologic Processes (Coplen/Bohlke/Revesz)
- Partitioning of Solutes between Solid and Aqueous Phases (Kent/Fuller)
- Transport and Biogeochemical Fate of Organic Substances in Aquatic Environments (Eganhouse)
- Geochemistry of Clay-Water Reactions (Eberl/Blum)
- Multiphase flow, transport, reaction, and biodegradation (Essaid/Bekins/Curtis/Duff/Green/Herkelrath)
- Modeling and uncertainty of complex ground-water systems (Hill)
- Hydrologic Studies of Heat and Mass Transport (Ingebritsen/Hurwitz)
- Isotope Tracers of Biogeochemical and Hydrologic Processes (Kendall/Michel/Silva/)
- Ground-Water Solute-Transport Simulation (Kipp/Stollenwerk)
- Digital Modeling of Transport in the Saturated Zone (Konikow)
- Hydrologic behavior of Cretaceous Shales (Neuzil/Scholl)
- Chemical Modeling of Acid Waters (Nordstrom/McCleskey)
- Reaction-Transport Modeling in Ground-Water Systems (Parkhurst/Riggs)
- Kinetics and Thermodynamics of Chemical Evolution in Ground-Water Systems (Plummer/Busenberg/Glynn)
- Regional Groundwater Flow and Transport (Sanford)
- Investigations of Single and Multiphase Fluid Flow, Mass and Energy Transport, and Fluid Phase Change in Subsurface Environment (Voss)
- Ground-Water Monitoring Network Design (Wagner)
- Field Applications of Unsaturated Zone Flow Theory (Weeks/Anderson/Healy/Stannard/Tindall)
- Geochemical Reactions Between Water and Mineral Substrates (White/Bullen/Presser/Schulz/Vivit)
Ground-water Hydraulics
- Multiphase flow, transport, reaction, and biodegradation (Essaid/Bekins/Curtis/Duff/Green/Herkelrath)
- The Application of Geophysical Logging to Hydrogeological Investigations (Morin)
- Hydrology of Fractured Rocks (Hsieh/Tiedeman)
- Digital Modeling of Transport in the Saturated Zone (Konikow)
- Hydrologic behavior of Cretaceous Shales (Neuzil/Scholl)
- Transport Phenomena in Fractured Rock (Shapiro)
- Investigations of Single and Multiphase Fluid Flow, Mass and Energy Transport, and Fluid Phase Change in the Subsurface Environment (Voss)
Hydroclimate (including droughts and floods)
- Arid Regions Climate and Chemistry (Benson)
- Biotic Response to Climatic Variability and Human Impacts in Arid Lands (Betancourt)
- Physical Chemistry of Stable Isotope Fractionation in Hydrologic Processes (Coplen/Bohlke/Revesz)
- Hydrologic Variability and Trends (Hirsch)
- Isotope Tracers of Biogeochemical and Hydrologic Processes (Kendall/Michel/Silva/)
- Hydrologic Variability and Trends (Hirsch)
- Regional Hydrologic Processes (Landwehr)
- Modeling of Watershed Systems (Hay/Webb)
- Hydro-climatic Processes and Hazards (McCabe)
- Continental Water, Climate, and Earth-System Dynamics (Milly/Eng)
- Geochemistry of Riverine and Estuarine Waters (Peterson/Cayan/Dettinger/Hostetler)
- Hydrogeology of Lakes, Wetlands and Streams (Rosenberry)
- Sediment-Water Chemistry in Large River Systems: Biogeochemical, Geomorphic, and Human Controls (Stallard/Martin)
- Characterization of Biotic and Biogeochemical Interactions at Environmental Interfaces (Striegl/Schuster/Walvoord)
- Mechanisms of biological and ecological response in disturbed aquatic ecosystems (Thompson//Brown/Cain/Carter/Fend/Hornberger/Stewart/Luoma)
- Landscape Change in the Southwest (Webb)
- Field Applications of Unsaturated Zone Flow Theory (Weeks/Anderson/Healy/Stannard/Tindall)
- Geochemical Reactions Between Water and Mineral Substrates (White/Bullen/Presser/Schulz/Vivit)
Hydrogeology
- Physical Chemistry of Stable Isotope Fractionation in Hydrologic Processes (Coplen/Bohlke/Revesz)
- Modeling and uncertainty of complex ground-water systems (Hill)
- Hydrology of Fractured Rocks (Hsieh/Tiedeman)
- Hydrologic Studies of Heat and Mass Transport (Ingebritsen/Hurwitz)
- Digital Modeling of Transport in the Saturated Zone (Konikow)
- Hydrologic behavior of Cretaceous Shales (Neuzil/Scholl)
- Kinetics and Thermodynamics of Chemical Evolution in Ground-Water Systems (Plummer/Busenberg/Glynn)
- Hydrogeology of Lakes, Wetlands and Streams (Rosenberry)
- Transport Phenomena in Fractured Rock (Shapiro)
- Investigations of Single and Multiphase Fluid Flow, Mass and Energy Transport, and Fluid Phase Change in the Subsurface Environment (Voss)
- Field Applications of Unsaturated Zone Flow Theory (Weeks/Anderson/Healy/Stannard/Tindall)
Hypoxia (see nutrients)
Invasive Species
- Biotic Response to Climatic Variability and Human Impacts in Arid Lands (Betancourt)
- Plankton Dynamics in Tidal Estuaries (Cloern/Cole)
- Vegetation and Hydrogeomorphic Relations (Hupp/Noe/Rybicki)
- Mechanisms of biological and ecological response in disturbed aquatic ecosystems (Thompson//Brown/Cain/Carter/Fend/Hornberger/Stewart/Luoma)
- Geochemistry of Riverine and Estuarine Waters (Peterson/Cayan/Dettinger/Hostetler)
Isotopic Tracers
- Physical Chemistry of Stable Isotope Fractionation in Hydrologic Processes (Coplen/Bohlke/Revesz)
- Isotope Tracers of Biogeochemical and Hydrologic Processes (Kendall/Michel/Silva)
- Hydrogeochemical and Microbiological Investigations of Radionuclides, Nutrients, and Environmental Contaminants. (Landa/Jones/Kraemer)
- Kinetics and Thermodynamics of Chemical Evolution in Ground-Water Systems (Plummer/Busenberg/Glynn)
- Geochemical Reactions Between Water and Mineral Substrates (White/Bullen/Presser/Schulz/Vivit)
Lakes
- Arid Regions Climate and Chemistry (Benson)
- Plankton Dynamics in Tidal Estuaries (Cloern/Cole)
- Isotope Tracers of Biogeochemical and Hydrologic Processes (Kendall/Michel/Silva)
- Solute Transport Involving Biological Processes in Surface Waters (Kuwabara)
- Biogeochemistry at Regional Scales (Marvin-DiPasquale)
- Microbial Biogeochemistry of Aquatic Environments (Oremland/Miller)
- Hydrogeology of Lakes, Wetlands and Streams (Rosenberry)
- Biogeochemistry of Carbon and Nitrogen in Aquatic Environments (Smith)
- Characterization of Biotic and Biogeochemical Interactions at Environmental Interfaces (Striegl/Schuster/Walvoord)
Metals
- Partitioning of Solutes between Solid and Aqueous Phases (Kent/Fuller)
- Vegetation and Hydrogeomorphic Relations (Hupp/Noe/Rybicki)
- Solute Transport Involving Biological Processes in Surface Waters (Kuwabara)
- Mechanisms of biological and ecological response in disturbed aquatic ecosystems (Thompson//Brown/Cain/Carter/Fend/Hornberger/Stewart/Luoma)
- Hydrogeochemical and Biogeochemical Studies of Volcanic and Geothermal Systems (Mariner/Evans)
- Biogeochemistry at Regional Scales (Marvin-DiPasquale)
- Chemical Modeling of Acid Waters (Nordstrom/McCleskey)
- Microbial Biogeochemistry of Aquatic Environments (Oremland/Miller)
- Biogeochemistry of Metals and Nutrients in Sediments (Simon)
- Sediment-Water Chemistry in Large River Systems: Biogeochemical, Geomorphic, and Human Controls (Stallard/Martin)
- Characterization of Biotic and Biogeochemical Interactions at Environmental Interfaces (Striegl/Schuster/Walvoord)
- Geochemical Reactions Between Water and Mineral Substrates (White/Bullen/Presser/Schulz/Vivit)
Microbiology : Activity, Biogeochemistry, and Transport in Water
- Interaction of Bacteria with Environmental Contaminants and Solid Surfaces in the Aquatic Environment (Harvey/Metge)
- Hydrogeochemical and Microbiological Investigations of Radionuclides, Nutrients, and Environmental Contaminants. (Landa/Jones/Kraemer)
- Biogeochemistry at Regional Scales (Marvin-DiPasquale)
- Microbial Biogeochemistry of Aquatic Environments (Oremland/Miller)
- Biogeochemistry of Carbon and Nitrogen in Aquatic Environments (Smith)
Nutrients
- Physical Chemistry of Stable Isotope Fractionation in Hydrologic Processes (Coplen/Bohlke/Revesz)
- Hydrologic Variability and Trends (Hirsch)
- Isotope Tracers of Biogeochemical and Hydrologic Processes (Kendall/Michel/Silva)
- Geochemistry of Riverine and Estuarine Waters (Peterson/Cayan/Dettinger/Hostetler)
- Organic Nitrogen and Organic Carbon in Hydrologic Systems (Rostad/Rutherford)
- Biogeochemistry of Metals and Nutrients in Sediments (Simon)
- Biogeochemistry of Carbon and Nitrogen in Aquatic Environments (Smith)
- Characterization of Biotic and Biogeochemical Interactions at Environmental Interfaces (Striegl/Schuster/Walvoord)
Organic Compounds (natural and man-made)
- Organic Carbon Migration in Aquatic Environments (Aiken/Thorn/Wickland)
- Chemical Transformations in Water Reclamation and Reuse (Barber)
- Biogeochemical Controls on Organic Contaminant Degradation in Heterogeneous Near Surface Environments (Cozzarelli)
- Transport and Biogeochemical Fate of Organic Substances in Aquatic Environments (Eganhouse)
- Multiphase flow, transport, reaction, and biodegradation (Essaid/Bekins/Curtis/Duff/Green/Herkelrath)
- Isotope Tracers of Biogeochemical and Hydrologic Processes (Kendall/Michel/Silva)
- Organic Nitrogen and Organic Carbon in Hydrologic Systems (Rostad/Rutherford)
Radionuclides
- Partitioning of Solutes between Solid and Aqueous Phases (Kent/Fuller)
- Isotope Tracers of Biogeochemical and Hydrologic Processes (Kendall/Michel/Silva)
- Hydrogeochemical and Microbiological Investigations of Radionuclides, Nutrients, and Environmental Contaminants. (Landa/Jones/Kraemer)
- Chemical Modeling of Acid Waters (Nordstrom/McCleskey)
- Kinetics and Thermodynamics of Chemical Evolution in Ground-Water Systems (Plummer/Busenberg/Glynn)
Rivers and Streams
- Organic Carbon Migration in Aquatic Environments (Aiken/Thorn/Wickland)
- Erosion and Deposition Processes (Moody/Griffin)
- Chemical Transformations in Water Reclamation and Reuse (Barber)
- Physical Chemistry of Stable Isotope Fractionation in Hydrologic Processes (Coplen/Bohlke/Revesz)
- Hydrologic, Ecological, and Biogeochemical Processes in Flowing Waters (Harvey/Larsen)
- Hydrologic Variability and Trends (Hirsch)
- Isotope Tracers of Biogeochemical and Hydrologic Processes (Kendall/Michel/Silva)
- Solute Transport Involving Biological Processes in Surface Waters (Kuwabara)
- Regional Hydrologic Processes (Landwehr)
- Modeling of Watershed Systems (Hay/Webb)
- Hydro-climatic Processes and Hazards (McCabe)
- Mechanisms of biological and ecological response in disturbed aquatic ecosystems (Thompson//Brown/Cain/Carter/Fend/Hornberger/Stewart/Luoma)
- Biogeochemistry at Regional Scales (Marvin-DiPasquale)
- Continental Water, Climate, and Earth-System Dynamics (Milly/Eng)
- Environmental Fluid Dynamics (Nelson/Simoes)
- Sediment Impacts from Disturbed and Undisturbed Lands (Osterkamp)
- Aqueous crystal growth and dissolution kinetics of earth surface minerals (Reddy)
- Organic Nitrogen and Organic Carbon in Hydrologic Systems (Rostad/Rutherford)
- Biogeochemistry of Metals and Nutrients in Sediments (Simon)
- Sediment-Water Chemistry in Large River Systems: Biogeochemical, Geomorphic, and Human Controls (Stallard/Martin)
- Statistical Analysis of Errors in Hydrologic Models (Troutman)
- Landscape Change in the Southwest (Webb)
Sediment Chemistry
- Organic Carbon Migration in Aquatic Environments (Aiken/Thorn/Wickland)
- Chemical Transformations in Water Reclamation and Reuse (Barber)
- Arid Regions Climate and Chemistry (Benson)
- Partitioning of Solutes between Solid and Aqueous Phases (Kent/Fuller/)
- Transport and Biogeochemical Fate of Organic Substances in Aquatic Environments (Eganhouse)
- Mechanisms of biological and ecological response in disturbed aquatic ecosystems (Thompson//Brown/Cain/Carter/Fend/Hornberger/Stewart/Luoma)
- Organic Nitrogen and Organic Carbon in Hydrologic Systems (Rostad/Rutherford)
- Biogeochemistry of Metals and Nutrients in Sediments (Simon)
- Sediment-Water Chemistry in Large River Systems: Biogeochemical, Geomorphic, and Human Controls (Stallard/Martin)
- Geochemical Reactions Between Water and Mineral Substrates (White/Bullen/Presser/Schulz/Vivit)
Sediment Transport
- Vegetation and Hydrogeomorphic Relations (Hupp/Noe/Rybicki)
- Erosion and Deposition Processes (Moody/Griffin)
- Environmental Fluid Dynamics (Nelson/Simoes)
- Sediment Impacts from Disturbed and Undisturbed Lands (Osterkamp)
- Landscape Change in the Southwest (Webb)
Statistical Hydrology
- Modeling and uncertainty of complex ground-water systems (Hill)
- Hydrologic Variability and Trends (Hirsch)
- Regional Hydrologic Processes (Landwehr)
- Application of Stochastic Processes in Hydrogeology (Naff)
- Statistical Analysis of Errors in Hydrologic Models (Troutman)
- Ground-Water Monitoring Network Design (Wagner)
Stream Channel Morphology
- Erosion and Deposition Processes (Moody/Griffin)
- Environmental Fluid Dynamics (Nelson/Simoes)
Surface Chemistry
- Organic Carbon Migration in Aquatic Environments (Aiken/Thorn/Wickland)
- Partitioning of Solutes between Solid and Aqueous Phases (Kent/Fuller/)
- Geochemistry of Clay-Water Reactions (Eberl/Blum)
- Kinetics and Thermodynamics of Chemical Evolution in Ground-Water Systems (Plummer/Busenberg/Glynn)
- Aqueous crystal growth and dissolution kinetics of earth surface minerals (Reddy)
- Geochemical Reactions Between Water and Mineral Substrates (White/Bullen/Schulz/Vivit)
Surface-water - Ground-water Interactions
- Hydrologic, Ecological, and Biogeochemical Processes in Flowing Waters (Harvey/Larsen)
- Hydrogeology of Lakes, Wetlands and Streams (Rosenberry)
- Environmental Tracers of Surface-Water / Ground Water Interactions (Constantz/Stonestrom)
Surface-Water Hydraulics
- Environmental Fluid Dynamics (Nelson/Simoes)
Surface-Water Transport and Reactions
- Physical Chemistry of Stable Isotope Fractionation in Hydrologic Processes (Coplen/Bohlke/Revesz)
- Hydrologic Variability and Trends (Hirsch)
- Modeling of Watershed Systems (Hay/Webb)
- Hydro-climatic Processes and Hazards (McCabe)
- Chemical Modeling of Acid Waters (Nordstrom/McCleskey)
Unsaturated Zone
- Environmental Tracers of Surface-Water / Ground Water Interactions (Constantz/Stonestrom)
- Physical Chemistry of Stable Isotope Fractionation in Hydrologic Processes (Coplen/Bohlke/Revesz)
- Multiphase flow, transport, reaction, and biodegradation (Essaid/Bekins/Curtis/Duff/Green/Herkelrath)
- Isotope Tracers of Biogeochemical and Hydrologic Processes (Kendall/Michel/Silva)
- Continental Water, Climate, and Earth-System Dynamics (Milly/Eng)
- Physical Characteristics that Determine Flow in the Unsaturated Zone (Nimmo/Perkins)
- Characterization of Biotic and Biogeochemical Interactions at Environmental Interfaces (Striegl/Schuster/Walvoord)
- Investigations of Single and Multiphase Fluid Flow, Mass and Energy Transport, and Fluid Phase Change in the Subsurface Environment (Voss)
- Field Applications of Unsaturated Zone Flow Theory (Weeks/Anderson/Healy/Stannard/Tindall)
Volcanic Hazards
- Ground-Water Solute-Transport Simulation (Kipp/Stollenwerk)
- Hydrologic Studies of Heat and Mass Transport (Ingebritsen/Hurwitz)
- Hydrogeochemical and Biogeochemical Studies of Volcanic and Geothermal Systems (Mariner/Evans)
- Hydrologic behavior of Cretaceous Shales (Neuzil/Scholl)
- Investigations of Single and Multiphase Fluid Flow, Mass and Energy Transport, and Field Applications of Unsaturated Zone Flow Theory (Weeks/Anderson/Healy/Stannard/Tindall)
Watershed Studies
- Physical Chemistry of Stable Isotope Fractionation in Hydrologic Processes (Coplen/Bohlke/Revesz)
- Isotope Tracers of Biogeochemical and Hydrologic Processes (Kendall/Michel/Silva)
- Modeling of Watershed Systems (Hay/Webb)
- Hydro-climatic Processes and Hazards (McCabe)
- Hydrogeology of Lakes, Wetlands and Streams (Rosenberry)
- Sediment-Water Chemistry in Large River Systems: Biogeochemical, Geomorphic, and Human Controls (Stallard/Martin)
- Characterization of Biotic and Biogeochemical Interactions at Environmental Interfaces (Striegl/Schuster/Walvoord)
- Geochemical Reactions Between Water and Mineral Substrates (White/Bullen/Schulz/Vivit)
Wetlands
- Chemical Transformations in Water Reclamation and Reuse (Barber)
- Hydrologic, Ecological, and Biogeochemical Processes in Flowing Waters (Harvey/Larsen)
- Vegetation and Hydrogeomorphic Relations (Hupp/Noe/Rybicki)
- Hydrogeology of Lakes, Wetlands and Streams (Rosenberry)
- Landscape Change in the Southwest (Webb)

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