Layne Christensen Company, St Louis, MO

Designed and conducted multiple aquifer tests to identify anisotropy within a wide oxbow stretch along the Mississippi River in St Louis, Missouri.  Developed an integrated surface-groundwater model and validated the same to historically observed (terrestrial and subsurface) hydrologic conditions.  Model utilized to design a multi-use transportation network along the Mississippi River.

Kansas Geological Survey, Lawrence, KS
U.S. Department of Energy, Morgantown, WV

Prepared all necessary technical documents and project plans in support of an EPA Class VI carbon dioxide injection permit.  Project utilized advanced techniques to characterize the 5,000 feet deep cambrian carbonate reservoir.  Ion composition, molar ratios, biogeochemistry, and isotopic characterization, were used to estimate the competence of the caprock and hydraulic stratification within the injection zone. The biomass concentrations and microbial diversity information was used to validate geochemical findings.

X-Ray Diffraction and Spectral Gamma Ray Analyses (specifically Rhomma-Umma analysis) were utilized for mineralogical characterization of the injection and confining zones. This information was necessary to develop the reaction kinetics for conducting geochemical simulations to establish the sequestration capacity and changes in formation petrophysical properties such as permeability and porosity due to precipitation of minerals.  Helical computerized tomography scans were examined to inspect the texture of the rocks and to detect the presence of minute fractures.  The Nuclear Magnetic Resonance (NMR) and sonic logs were used collectively to estimate the matrix and vuggy porosities.

Conducted multiphase flow and transport simulations using STOMP software to predict the plume size and pressure front.  Carried out geomechanical (poro-elastic) simulations in order to predict land surface deformations in support of (InSAR) satellite based monitoring of pore pressures in the injection zone.  Developed analytical methodologies for predicting the likelihood of inducing earthquakes due to injection.

Worked with U.S. EPA to lower the financial assurance costs, and with re-insurers for obtaining financial coverage in a seismically active area. Established the project Testing and Monitoring Plan and Quality Assurance/Quality Control protocols.  Developed operating plan for safe and efficient injection in order to mitigate operational risks associated with earthquakes and caprock leakage.

St Johns River Water Management District, Palatka, FL

Developed a multilayer model of the surficial and Floridan aquifer systems in Flagler County, Florida. Model used by the District for conducting vegetation harm analysis and determining optimal sites and pumping rates for new well fields so as to minimize environmental impacts on wetlands.

Archer Engineers, Lee’s Summit, MO

Developed mathematical algorithm for estimating sewer pipe network construction costs utilizing site environmental, geologic, and climatic data, along with economic statistics such as regional labor costs and consumer price index trends. Developed a graphical user interface to assist the user in bidding on construction projects using the pricing scheme developed for the project.

HDR, Inc, Omaha, NE

Developed an integrated MODFLOW-CROPSIM soil-groundwater stream-aquifer interaction model covering the Lower Platte basin in eastern Nebraska. The model is utilized by the Nebraska Department of Natural Resources to conduct stream depletion analysis for groundwater permitting and management purposes. The model domain covers seventy four watershed basins and accounts for transient evaporation, precipitation, runoff, plant uptake, and irrigation to derive aquifer recharge. Aquifer parameterization was accomplished using the Pilot Point methodology, and the coupled model calibrated with the PEST optimization software.

Quad State Services, Perry, KS

Developed a mutli-layer hydrologic model for determining safe wellfield yield in close proximity to waste management sites from which volatile organic compounds and metals were leaching in the subsurface. The objective of the study was to establish pumpage patterns that minimize contaminant movement and maintain water quality standards mandated by EPA’s Safe Drinking Water Act.

HydroGeoLogic, Inc, Reston, VA

Consultant for Lower East Coast saltwater intrusion modeling initiative undertaken by South Florida Water Management District. Developed model conceptualization and implementation plan for project. Examined the role of temperatures in the coastal flow dynamics along the southern tip of the Floridan peninsula.

Universal Asset Management, Overland, KS

Developed software package to assist in automated design of low pressure sewer networks operated by grinder pumps. Algorithm accounts for variable terrain, utilizes statistics for inferring usage patterns, and is based on retention time analysis to minimize sulfide generation in pipe networks.

Daniel B. Stephens & Associates, Albuquerque. NM

Simulated flow emanating at the surface and traversing through the vadose zone in a highly heterogeneous groundwater reservoir at a contamination site in western United States. The model was utilized to identify parties responsible for hydrocarbon contamination in the area.

Jonesboro City Water & Light, Jonesboro, AR

Developed mathematical procedures and methodologies for estimating well field pumpage utilizing pumped water quality data. Solved the highly nonconvex optimization problem within a global framework. Utilizing the software, pumpage in each wells can be determined by simply using water quality data in a well and knowing the cumulative wellfield pumpage.