Dr. Spiliotopoulos’ expertise is quantitative and qualitative analysis of environmental data to support water resources management. He develops and applies analytical and numerical groundwater models, develops novel methods for evaluating water quantity and quality data, and designs and optimizes multiscale remedial systems and monitoring programs. He brings extensive experience in the remediation of nuclear and CERCLA sites, providing expert modeling support for RI/FS, RPO, and RD/RA Work Plans; design, performance assessment and optimization of remedial systems for fuel additives, metals, radionuclides and VOCs; as well as water-resource assessment and management for water-supply development and water-use conflict resolution.

EDUCATION
  • PhD, Civil and Environmental Engineering, University of Vermont, 1999
  • BS, Civil Engineering, University of Patras, Greece, 1994
AREAS OF EXPERTISE
  • Groundwater Remedy Design and Evaluations
  • Water Resource Evaluations
  • Environmental Data Analysis
  • Groundwater Model Development
  • Interstate Water Resource Management Conflict Resolution
PROFESSIONAL SOCIETIES
  • National Ground Water Association (NGWA)
  • American Geophysical Union (AGU)
LANGUAGES
  • English
  • Greek
REPRESENTATIVE PROJECTS
Hanford Natural Resources Damage Assessment Upwelling Study2024-10-22T15:26:01+00:00

Hanford Natural Resources Damage Assessment Upwelling Study

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Hanford Site: Groundwater Modeling2024-10-22T15:29:24+00:00
Hanford Groundwater Model figure

Hanford Site: Groundwater Modeling

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Sparton Technology Remediation2024-10-22T15:41:20+00:00
Sparton Technology Remediation

Sparton Technology Remediation

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EPA Region 5 Hydrogeological Synthesis and Numerical Modeling Support2024-10-30T21:48:33+00:00
Map of SSP&A's current and past projects for EPA Region 5

EPA Region 5 Hydrogeological Synthesis and Numerical Modeling Support

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Fate and Transport Modeling of Fuel Additives2024-10-22T15:24:26+00:00
NYSDEC Figure

Fate and Transport Modeling of Fuel Additives

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Hanford Site Statistics and PHREEQC Geochemical Model2024-10-09T18:53:48+00:00

Hanford Site Statistics and PHREEQC Geochemical Model

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Geochemical and Hydrogeological Evaluation of Former Yerington Mine Site2024-10-22T15:25:27+00:00

Geochemical and Hydrogeological Evaluation of Former Yerington Mine Site

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PUBLICATIONS & PRESENTATIONS

  • Muffels, C., S. Panday, C. Andrews, M. Tonkin, and A. Spiliotopoulos, 2022. Simulating Groundwater Interaction with a Surface Water Network using Connected Linear Networks. Groundwater. doi: 10.1111/gwat.13202

  • Spiliotopoulos A., E.L. DiFilippo, P. Khambhammettu, D. Hayes, M.J. Tonkin, M. Hartman, K. Ivarson, and J. Hulstrom, 2019. Web-Assisted Methods and Tools for Efficient Remedy Design and System Performance Evaluation at Hanford. Presentation at the Waste Management Conference, Phoenix, AZ, March 7, 2019. Received “Superior” paper and “WM2019 Papers of Note Winner” awards. OSTI #23003084

  • DiFilippo E.L., M.J. Tonkin, A. Spiliotopoulos, W. Huber, and V. Rohay, 2019. Evaluating Environmental Remediation Performance at Radwaste Sites Using Multiple, Censored Regression Analysis. Presentation at the Waste Management Conference, Phoenix, AZ, March 7, 2019. IAEA #52043413

  • Spiliotopoulos, A., R. Shannon, M.J. Tonkin, and L.C. Swanson, 2011. Evaluation of Temporal Variations in Hydraulic Capture due to Changing Flow Patterns Using Mapping and Modeling Techniques. Presentation at MODFLOW and More 2011, Colorado School of Mines, Golden, CO. OSTI #1011435

  • Bedekar, V., M.J. Tonkin, and A. Spiliotopoulos, 2011. Implementation of a Contaminant Treatment System (CTS) Module in MT3DMS. Presentation at MODFLOW and More 2011, Colorado School of Mines, Golden, CO.

  • Khambhammettu, P., M.J. Tonkin, and A. Spiliotopoulos, 2011. FIELDGEN_D – A Modified 2D Field Generator for Deterministic and Stochastic Groundwater Modeling. Presentation at MODFLOW and More 2011, Colorado School of Mines, Golden, CO.

  • Shannon, R., A. Spiliotopoulos, and M.J. Tonkin, 2011. Estimating Contaminant Migration Pathways Using a Time Sequence of Water Level Maps and Particle Tracking. Presentation at the 2011 Ground Water Summit and 2011 Ground Water Protection Council Spring Meeting. National Ground Water Association, Baltimore, MD.

  • Smoot, J.L., F.H. Biebesheimer, J.A. Eluskie, T. Simpkin, M.J. Tonkin, and A. Spiliotopoulos, 2011. Groundwater Remediation at the 100-HR-3 Operable Unit, Hanford Site, Washington. Presentation at the Waste Management Conference, Phoenix, AZ. February 27– March 3, 2011. OSTI # 1004613

  • Spiliotopoulos, A., M.J. Tonkin, D. Shrimpton, J. Blount, T. Simpkin, and J. Hanson, 2010. Groundwater Modeling in Support of Remedial Process Optimization: Implementing a Developing Conceptual Site Model into Comparative Remedy Analyses. Presentation at the Waste Management Conference, Phoenix, AZ, March 7-11, 2010.

  • Spiliotopoulos, A., M. Karanovic, and S.P. Larson, 2008. Development of Transient Flow Models for the Solomon River Basin. Presentation at MODFLOW and More 2008, Colorado School of Mines, Golden, CO.

  • Spiliotopoulos, A., K. Krajenke, N. Hart, J. Haas, D. Cornacchiulo, D. Trego, and M. Tonkin, 2008. Robust Pump-and-Treat Remedy Evaluation for an MTBE Mega-Plume. Presentation at the National Ground Water Association (NGWA) Conference on Eastern Regional Ground Water Issues, Ronkonkoma, NY.

  • Spiliotopoulos, A., K. Krajenke, K. Salafrio, and J. Haas, 2008. Rapid Mapping to Support Accelerated Site Assessments. Presentation at NGWA Conference on Eastern Regional Ground Water Issues, Ronkonkoma, NY.

  • Spiliotopoulos, A., and C.B. Andrews, 2007. Analysis of Aquifer Test Data – MODFLOW and PEST. in Groundwater and Wells. (3rd ed.). Sterrett, R.J., ed. New Brighton, MN: Johnson Screens. 812 p. (also presented at MODFLOW and More 2006, Colorado School of Mines, Golden, CO).

  • Spiliotopoulos, A.A., G.P. Karatzas, and G.F. Pinder. 2004. A Multi-period Approach to the Solution of Groundwater Management Problems Using an Outer Approximation Method. European Journal of Operational Research, v. 157, no. 2 (September), pp. 514-525. doi: 10.1016/S0377-2217(03)00239-X

  • Matsouki, Μ., G. Germanopoulos, and A. Spiliotopoulos, 2003. Geographical Information Systems (G.I.S.) Implementation in Water Supply Network Modeling. Presentation at the XXX IAHR Congress, Thessaloniki, Greece. August 24-29, 2003.

  • Spiliotopoulos, A.A., G.P. Karatzas, and G.F. Pinder, 2000. A Biconcave-Decomposition Method for the Optimal Design of Pump-and-Treat Remediation Systems Including the Treatment Plant. Presentation at the 13th International Conference on Computational Methods in Water Resources, Calgary, Canada. June 2000.

  • Karatzas, G.P., and A.A. Spiliotopoulos, 1998. Development of Two Optimization Models: (1) A Multi-period Approach to Solve Engineering Management Problems, and (2) Incorporating Uncertainty in the Decision-Making Process for Optimal Management Design. An Application to a Groundwater Management Problem. Presentation at the Vermont EPSCoR (Experimental Program to Stimulate Competitive Research) Annual Conference on Science and Technology, University of Vermont, October 6, 1998.