IGWMC Projects and Personnel


Principal Investigator

Current Projects and Research Interests

Reed Maxwell
Associate Professor

1) NSF UMBC: Integrating Real-Time Chemical Sensors into Understanding of Groundwater Contributions to Surface Water in an Urban Environmental Observatory
2) NSF: Coupling of PARFLOW and CrunchFlow for High Resolution Reactive Transport Modeling of Variably Saturated Flow
3) NSF: Collaborative Research: High Resolution Sensor Networks for Quantifying and Predicting Surface-Groundwater Mixing and Nutrient Delivery in the Santa Fe River, Florida
4) NSF IGERT: Climate Change, Water and Society (CCWAS)
5) NSF: An integrated hydrologic model intercomparison workshop to develop community benchmark problems
6) State of Colorado: Fully-Coupled Hydrologic Modeling with Ensemble Data Assimilation for Enhanced Prediction 

Research Interests: watershed hydrology, groundwater-surface-water-land surface interactions, land-atmosphere interactions, microbial subsurface contaminant transport, spectral scaling in watersheds, integrated watershed response to climate change, environmental risk assessment, development of numerical models, Lagrangian methods and high-performance computing 

Kamini Singha
Associate Professor

1) DOE: Geoelectrical Measurement of Multi-Scale Mass-Transfer Parameters
2) NSF CZO:  Susquehanna/Shale Hills Critical Zone Observatory
3) NSF CAREER: Mass Transport in Groundwater: An Integration of Research and Experiential Education
4) NSF IF: Acquistion of Instrumentation to Measure Electrical Resistivity at the Field and Lab Scale
5) NSF CNH: Climatic Extremes, Mining, and Mycobacterium ulcerans: A Coupled Systems Perspective

Research Interests: 1) hydrologic processes utilizing geophysical techniques, hydrologic tools, and mathematical simulation to improve predictive modeling; 2) quantification of the "geophysical footprint" to constrain the operation of parameters controlling fluid flow and solute transport in various settings; 3) fluid flow and contaminant transport in porous media and fractured rock as well as groundwater-surface-water interactions; 4) water quality degradation and human behavior; 5) Imaging moisture dynamics in desert ecosystems; 6) exploring changes in infiltration after fire; 7) quantifying kinetics of iron reduction given electrical measurements. 

Alexis Navarre-Sitchler
Assistant Professor

1) Metal sources and behavior in potential drinking water aquifers impacted by CO2 leakage
2) Porosity and permeability changes in geochemically reactive environments
3) Coupled reactive transport and land surface processes at watershed scale
4) Quantification and evolution of connected and accessible surface area

Research Interests:
complex coupling of geochemical and hydrological processes in natural systems at scales from basins to pore networks.  My current research focuses on rock weathering, underground CO2 storage and metal release and transport.  I use a variety of advanced characterization tools and reactive transport models to understand these processes in both experimental and field systems and hopefully, ultimately, predict the rates of geochemical processes.

John McCray

EPA: Impacts of Mountain Pine Beetle on Hydrology and Water quality of Rocky Mountain watersheds

Research Interests: chemical transport in hydrologic systems, generally utilize some combination of field, laboratory, and modeling work.   Current projects include: potential release and transport of metals in groundwater due to CO2 leaking into overlying aquifers during carbon sequestration; geochemical reactions that influence porosity and permeability during carbon injection into saline aquifers, including the impacts on cap rocks; impact of the mountain pine beetle on hydrology and chemical transport in Rocky Mountain watersheds; transport, interphase mass-transfer and remediation of flourinated hydrocarbons in groundwater; chemical and bio remediation in fractured rock aquifers; using polymer solutions to enhance delivery of remediation agents to lower-permeability media; fate and transformation of nitrogen, pharmaceuticals and other emerging organics in the vadose zone during soil-based wastewater treatment; nitrogen contamination of springs in western Florida, and joint sustainability of water resources and petroleum-energy production.  

David Benson
Associate Professor

1) NSF: Collaborative Research: A Comparison of Local and Nonlocal Transport Theories
2) DOE-BES: Investigation into the Relationship between Heterogeneity and Heavy-tailed Solute Transport

Research Interests: 1) fractional calculus and hydrology (NSF Focused Research Groups in Mathematics); 2) self-similar random fields (NSF Computational Methods in Geology).


Postdoctoral Scholars

Research Interests and Products (Papers)

Brian Kirsch

Brian's expertise is in the area of water resource management. Specific areas of research include the use of markets, risk management, and the impacts of climate change on water resources.

Sonya Lopez

Research Interests: (1) Urban hydrology and contaminant transport, (2) hydrologic analysis of "green" urban practices to promote stormwater reinfiltration and reuse, and (3) impacts of climate varibility on long-term surface and subsurface water storage and water quality


Research Interests and Products (Papers)

Erica Siirila

Research Interests

  • Linking human health risk assessment and hydrogeology
  • Implications of physical and chemical heterogeneity on solute transport
  • Geostatistical techniques

[1] Siirila, E.R., Navarre-Sitchler, A.K., Maxwell, R.M., and McCray, J.M.  A quantitative methodology to assess the risks to human health from CO2 leakage into groundwater, Advances in Water Resources, 36.  doi:10.1016/j.advwatres.2010.11.005, 2012.

[2] Siirila, E.R. and Maxwell, R.M. Evaluating effective reaction rates of kinetically driven solutes in large-scale, statistically anisotropic media: human health risk implications, Water Resources Research 48(4): W04527.  doi:10.1029/2011WR011516, 2012.

[3] Siirila, E.R. and Maxwell, R.M. A new perspective on human health risk assessment: Development of a time dependent methodology and the effect of varying exposure durations, Science of the Total Environment, 431: p. 221-232, doi:10.1016/j.scitotenv.2012.05.030, 2012

Steve Meyerhoff <smeyerho@mines.edu>

Research Interests

  • Groundwater and surface water interactions
  • Using hydrogeophysical methods to investigate hydrologic phenomena
  • Numerical Modeling

[1]Meyerhoff S.B., Maxwell R.M., (2011). Quantifying the effects of subsurface heterogeneity on hillslope runoff using a stochastic approach, Journal of Hydrogeology,19:1515-1530, doi:10.1007/s10040-011-0753-y, 2011.

[2]Sulis, M., Meyerhoff, S., Paniconi, C., Maxwell, R.M., Putti, M. and Kollet, S.J., (2010). A comparison of two physics-based numerical models for simulating surface water-groundwater interactions, Advances in Water Resources, 33(4), 456-467.

Adam Atchley <aatchley@mines.edu>

[1] Atchley, A.L., Maxwell, R.M. and Navarre-Sitchler, A.K. Using streamlines to simulate stochastic reactive transport in heterogeneous aquifers: Kinetic metal release and transport in CO2 impacted drinking water aquifers. Advances in Water Resources in press, 2012.

[2] Benson, D.A., Atchley, A.L., Maxwell, R.M., Poeter, E., Ibrahim, H. , Dean, A., Revielle, J., Dogan, M., Major, E. Reply to Comment on "Comparison of Fickian and temporally nonlocal transport theories over many scales in an exhaustively sampled sandstone slab." Water Resources Research, 48, W07802, 5pp, doi: 10.1029/2012WR012004, 2012.

[3] Atchley, A.L. and Maxwell, R.M. Influences of subsurface heterogeneity and vegetation cover on soil moisture, surface temperature, and evapotranspiration at hillslope scales. Hydrogeology Journal 91(2), 289-305 doi:10.1007/s10040-010-0690-1, 2011.

Laura Condon <lcondon@mines.edu>

Research interests

  • Groundwater surface water interactions
  • Conjunctive water management and Coupling management algorithms to integrated models
  • High performance computing and numerical methods

Lindsay Bearup <lbearup@mines.edu>

Research interests include the interrelationships between water and nutrient cycles with possible implications for contaminant transport.

Current research invesitgates this concept in the context of the land cover change from the Mountain Pine Beetle epidemic in the Rocky Mountian West. Previous work approached the question from a geochemical perspective to understand groundwater residence times for which metal desorption kinetics are important.

Bearup, L.A., Navarre-Sitchler, A.K., Maxwell, R.M., McCray, J.E. 2012. Kinetic metal release from competing processes in aquifers. Environ. Sci. Technol. 46(12), 6539-6547. doi:10.1021/es203586y

Michael G. Sweetenham <msweeten@mines.edu>


Kimberly Bandy-Baldwin <kimberly.bandy.baldwin


Sophia Wolfenden <sawolfenden@gmail.com>

Interested in integrated hydrologic modeling, irrigation and its effects on water cycles, archaeological water usage

James Joseph Beisman <jbeisman@mines.edu>

Research interests: Modeling watershed-scale reactive transport, multi-phase contaminant transport, and transient flow

Colin Andre Kress Penn <cpenn@mines.edu>

Research Interests: Modeling watershed-scale hydrologic impacts of the mountain pine beetle infestation in Rocky Mountain National Park

William Vienne Loopesko <wloopesk@mines.edu>

Interested in surface water modelling of post-fire watershed response in the Waldo Canyon Burn, Rocky Mountain pine beetle impact on alpine watersheds in Rocky Mountain National Park

John Williams

Interested in groundwater-surface water-atmosphere interactions; Water resources, energy and global climate change; Renewable energy

Assaf Wunsch <assafwunsch@yahoo.com>

Katy Mouzakis
Rodrigo Prugue
Katie Kirsch
Moira Pryhoda
Stafford Johnson
Anthony Actis
Chemist, interested in chemical mass transfer and sorption and its geophysical signature
Katelyn Gerecht
Research interests includes groundwater-surface water interactions and has been exploring the impacts of dame removal on the ecological functions of stream systems
Rachael Pinkoski <rpinkosk@mines.edu> Currently working on drilling and characterization of subsurface flow within the Critical Zone Observatory Projects
Emmanuel Padilla <empadill@mines.edu> Research interests include the effects of wildfires on snowmelt-driven hydrologic processes and soil-water dynamics
Ryan Swanson
Intrested in combining hydrogeology and geophysics to understand contaminent fate and transport; as well as exploring mass-transfer length scales using electrical methods, with application to radionuclide transport at Hanford
Tim Gould
Currently working on analyzing distributed temperature data along a stream system near Shaver's Creek Environmental Center looking for discrete groundwater inputs, and exploring how temperature changes within the stream due to storm events