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Computational Sciences & Mathematics

Staff information

David Engel

David Engel

Computational Sciences & Mathematics Division
Scientist, TL
Pacific Northwest National Laboratory
PO Box 999
MSIN: K7-90
Richland, WA 99352


Dave Engel is a Senior Research Scientist in the Computational Mathematics Group of the Fundamental and Computational Sciences Directorate of the Pacific Northwest National Laboratory. He has been working on modeling and simulation projects for the past 25 years. Recently, he has been focusing on combining state-of-the-art statistical, mathematical, and computational methods in sensitivity analysis, uncertainty quantification, and optimization into iterative approximation techniques (including high performance computing), and applying them to the Hanford Groundwater modeling effort.

Research Interests

  • modeling and simulation
  • uncertainty and sensitivity analysis
  • statistical and mathematic methods development for data mining of text data

Education and Credentials

  • MBA Business Administration, University Washington 1991
  • BS Mathematics, Central Washington University 1982

PNNL Publications


  • Engel DW, and AC Dalton. 2014. TRL Computer System User’s GuidePNNL-23149, Pacific Northwest National Laboratory, Richland, WA. 
  • Fang Z, Z Hou, G Lin, DW Engel, Y Fang, and PW Eslinger. 2014. "Exploring the effects of data quality, data worth, and redundancy of CO2 gas pressure and saturation data on reservoir characterization through PEST Inversion." Environmental Earth Sciences 71(7):3025-3037.  doi:10.1007/s12665-013-2680-9
  • Hou Z, DH Bacon, DW Engel, G Lin, Y Fang, H Ren, and Z Fang. 2014. "Uncertainty analyses of CO2 plume expansion subsequent to wellbore CO2 leakage into aquifers." International Journal of Greenhouse Gas Control 27:69-80.  doi:10.1016/j.ijggc.2014.05.004



  • Engel DW, B Letellier, B Edwards, R Leclaire, and E Jones. 2012. "New Technical Risk Management Development for Carbon Capture Process." In Proceedings of the 11th Annual Conference on Carbon Capture Utilization and Sequestration, April 30-May 3, 2012, Pittsburgh, PA.  CCSI, Pittsburgh, PA. 
  • Engel DW, ML Gregory, EB Bell, and LR McGrath. 2012. "IDENTIFYING ON-LINE GROUPS BASED ON CONTENT AND COLLECTIVE BEHAVIORAL PATTERNS." In IADIS International Conference Web Based Communities and Social Media, July 22-24, 2011, Rome, Italy.  IADIS Press, n.p.. 
  • Engel DW. 2012. Initial Risk Analysis and Decision Making Framework PNNL-20932, Pacific Northwest National Laboratory, Richland, WA. 
  • Engel DW. 2012. Initial Decision and Risk AnalysisPNNL-21182, Pacific Northwest National Laboratory, Richland, WA. 
  • Lin G, DW Engel, and PW Eslinger. 2012. Survey and Evaluate Uncertainty Quantification MethodologiesPNNL-20914, Pacific Northwest National Laboratory, Richland, WA. 
  • Bell EB, EJ Marshall, RE Hull, AK Fligg, AP Sanfilippo, DS Daly, and DW Engel. 2012. "Classifying Scientific Performance on a Metric-by-Metric Basis." In Proceedings of the Twenty-Fifth International Florida Artificial Intelligence Research Society (FLAIRS) Conference, May 23-25, 2012, Marco Island, Florida, ed. GM Youndblood and PM McCarthy, pp. 400-403.  AAAI Press, Palo Alto, CA. 
  • Engel DW, AC Dalton, KK Anderson, C Sivaramakrishnan, and C Lansing. 2012. Development of Technology Readiness Level (TRL) Metrics and Risk MeasuresPNNL-21737, Pacific Northwest National Laboratory, Richland, WA. 
  • Engel DW, and AC Dalton. 2012. CCSI Risk Estimation: An Application of Expert ElicitationPNNL-21785, Pacific Northwest National Laboratory, Richland, WA. 
  • Gregory ML, DW Engel, EB Bell, and LR Mcgrath. 2012. "Identifying Differences in Cultural Behavior in Online Groups." Chapter 28 in Advances in Design for Cross-Cultural Activities Part II, ed. DD Schmorrow, pp. 283-292.  CRC Press, Boca Raton, FL. 


  • Gregory ML, DW Engel, EB Bell, AW Piatt, ST Dowson, and AJ Cowell. 2011. "Automatically Identifying Groups Based on Content and Collective Behavioral Patterns of Group Members." In Proceedings of the Fifth International Conference on Weblogs and Social Media, July 17-21, 2011, Barcelona, Spain, pp. 498-501.  AAAI Press, Palo Alto, CA. 


  • Engel DW, PD Whitney, and NO Cramer. 2010. "Events and Trends in Text Streams." Chapter 9 in Text Mining: Applications and Theory, ed. MW Berry and J Kogan, p. 165–182.  John Wiley & Sons, Ltd, Chichester, United Kingdom. 
  • Rose SJ, DW Engel, NO Cramer, and WE Cowley. 2010. "Automatic Keyword Extraction from Individual Documents." Chapter 1 in Text Mining: Application and Theory, vol. 1, ed. MWBerry, J Kogan, pp. 3-20.  John Wiley & Sons, Chichester, United Kingdom. 
  • Rose SJ, FJ Brockman, ML Hart, DW Engel, NB Valentine, and AJ Calapristi. 2010. Morphing Terminology StudyPNNL-19493, Pacific Northwest National Laboratory, Richland, WA. 


  • Engel DW, PD Whitney, AJ Calapristi, and FJ Brockman. 2009. "Mining for Emerging Technologies within Text Streams and Documents." In Society for Industrial and Applied Mathematics - 9th SIAM International Conference on Data Mining 2009: Proceedings in Applied Mathematics, vol. 3, pp. 1291-1301.  SIAM, Philadelphia, PA. 
  • Schneider KP, Y Chen, DW Engel, and DP Chassin. 2009. "A Taxonomy of North American Radial Distribution Feeders." In IEEE Power & Energy Society General Meeting (PES '09), July 26-30, 2009, Calgary, Alberta, Canada.  IEEE, Piscataway, NJ.  doi:10.1109/PES.2009.5275900
  • Whitney PD, DW Engel, and NO Cramer. 2009. "Mining for Surprise Events within Text Streams." In Proceedings of the SIAM International Conference on Data Mining (SDM 2009), vol. 1, no. 1, pp. 617-627.  Society for Industrial and Applied Mathematics, Philadelphia, PA. 




  • Scott MJ, CA Brandt, AL Bunn, DW Engel, PW Eslinger, TB Miley, BA Napier, EL Prendergast-Kennedy, and LA Nieves. 2005. "Modeling long-term risk to environmental and human systems at the Hanford Nuclear Reservation: Scope and findings from the initial model ." Environmental Management 35(1):84-98. 


  • Engel DW, AM Liebetrau, KD Jarman, TA Ferryman, TD Scheibe, and BT Didier. 2004. "An Iterative Uncertainty Assessment Technique for Environmental Modeling." In The joint proceedings of the sixth International Symposium on Spatial Accuracy Assessment in Natural Resources and Environmental Sciences and the fifteenth annual conference of TIES, the International Environmetrics Society Portland, Maine, USA, June 28-July 1, 2004, ed. H. Todd Mowrer, Ronald E. McRoberts, and Paul C. VanDeusen, p. 8 pages.  USDA Forest Service, Washington, DC. 
  • Eslinger PW, TB Miley, DW Engel, WE Nichols, LH Gerhardstein, DL Strenge, CA Lopresti, and SK Wurstner. 2004. User Instructions for the Systems Assessment Capability, Rev. 1, Computer Codes Volume 1: Inventory, Release, and Transport Modules PNNL-14852 Volume 1, Pacific Northwest National Laboratory, Richland, WA. 


  • Eslinger PW, DW Engel, LH Gerhardstein, CA Lopresti, WE Nichols, and DL Strenge. 2002. User Instructions for the Systems Assessment Capability, Rev. 0, Computer Codes Volume 1: Inventory, Release, and Transport ModulesPNNL-13932, Pacific Northwest National Laboratory, Richland, WA. 
  • Kincaid CT, PW Eslinger, DW Engel, WE Nichols, RW Bryce, and AL Bunn. 2002. "A Stochastic Assessment of Nuclear Waste Management Practices at the Hanford Site, Washington." In Scientific basis for nuclear waste management XXV : symposium held November 26-29, 2001, Boston, Massachusetts, U.S.A. / Materials Research Society Symposium Proceedings., vol. 713, ed. BP McGrail, G.A. Cragnolino, pp. 275-283.  Materials Research Society, Warrendale, PA. 


  • Scott MJ, RD Sands, JA Edmonds, AM Liebetrau, and DW Engel. 2000. "Uncertainty in Integrated Assessment Models: Modeling with MiniCAM 1.0." Energy Policy 27(14):855-879. 

Computational Sciences & Mathematics


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Fundamental & Computational Sciences

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