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An analysis platform for multiscale hydrogeologic modeling with emphasis on hybrid multiscale methods.

Timothy D Scheibe1, Ellyn M Murphy, Xingyuan Chen

  • 1Pacific Northwest National Laboratory, PO Box 999,MS K9-36, Richland, WA 99352.

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Summary

Hydrogeologic modeling faces scale challenges. Hybrid multiscale methods couple different models for accurate groundwater flow and transport simulations across vast scales.

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Area of Science:

  • Environmental Science
  • Geology
  • Computational Science

Background:

  • Hydrogeologic modeling struggles with scale disparities between process understanding (pore-scale, seconds) and practical prediction needs (aquifer-scale, centuries).
  • Current computational and characterization limits necessitate coarse model representations, potentially compromising physical meaning and predictive accuracy.

Purpose of the Study:

  • To review multiscale simulation approaches for hydrogeologic problems.
  • To propose a classification scheme for multiscale simulation methods and their applications.
  • To focus on hybrid multiscale methods and their emerging use in groundwater modeling.

Main Methods:

  • Review of various multiscale simulation approaches.
  • Development of a classification scheme presented as a flowchart (Multiscale Analysis Platform).
  • Focus on hybrid methods directly coupling models with different physics and scales.

Main Results:

  • A classification scheme is proposed, defining different multiscale simulation motifs.
  • Hybrid multiscale methods are identified as a key approach, directly coupling models across scales.
  • Recent applications of hybrid methods to groundwater flow and transport are discussed.

Conclusions:

  • Hybrid multiscale modeling offers a rigorous approach to address scale challenges in hydrogeology.
  • As technology advances, hybrid multiscale modeling is expected to become more prevalent and a viable alternative to single-scale models.