Alexander SunResearch Scientist, Bureau of Economic Geology
My main research areas are in (a) modeling surface and subsurface fluid flow and mass transport processes, (b) water resources management, and (c) web-based decision support systems. In particular, I am interested in addressing the following research questions: how to maximize the use of information for developing better parametric and nonparametric models, how to leverage scientific research for sustainable water resources management, how to support environmental decision making under knowledge gap and linguistic uncertainty.
Over the years, I have been fortunate to work on a number of projects related to high-level radioactive waste repository, geologic carbon sequestration, and nonpoint source pollution, all of which require significant uncertainty analyses. I am proficient in geostatistical modeling, inverse modeling and optimization algorithms, theoretical and numerical modeling techniques, database-driven application development, and scientific visualization.
Areas of Expertise
Subjects: Carbon sequestration, hydrological modeling, computational geoscience, fracture/fault modeling Skill sets: Geostatistical modeling, inversion and optimization algorithms, numerical modeling, web-based decision support systems Programming: Matlab, Python, Fortran, C, ArcGIS
Current Research Programs & Projects
EPA STAR CO2 Monitoring
Select Past Research
NASA: A collaborative geospatial decision support system for managing coastal river basins
Inversion of pressure anomaly data for CO2 leakage detection at geologic carbon sequestration sites, AGU, San Francisco, CA (2012)
Development of a Collaborative Decision Support System for Manaing TMDLs, LBJ School of Public Affairs, Austin, TX (2011)
Estimating regional groundwater model parameters using GRACE and in situ observations, AGU, San Francisco, CA (2010)
A collaborative geospatial decision support system for managing coastal river basin water quality, Hydrologic Science Conference, San Diego, CA (2010)
Uncertainty quantification and parameter estimation in hydrogeology, UTSA Department of Geosciences, Spring Environmental Seminar Series, San Antonio, TX (2010)
Development of an ensemble Kalman filter and its application in geoscience applications:, Texas A&M Kingsville Civil and Environmental Engineering Department Fall Seminar Series, Kingsville, TX (2009)
Texas Groundwater Quality Report Card
This app shows water quality information for all TX wells. Information is extracted from Texas Water Development Board groundwater database.
Collaborative Geospatial Decision Support System
This product provides a web-based DSS for total maximum daily loading (TMDL) management.