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Generating MODFLOW grids from boundary representation solid models.

Norman L Jones1, Trevor J Budge, Alan M Lemon

  • 1Environmental Modeling Research Laboratory, Brigham Young University, Provo, UT 84602, USA. njones@byu.edu

Ground Water
|March 28, 2002
PubMed
Summary
This summary is machine-generated.

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Simulating complex stratigraphy in MODFLOW (Modular Flow Model) is challenging. This study presents a method using solid models to automatically generate compatible MODFLOW grids, simplifying geological simulations.

Area of Science:

  • Hydrogeology
  • Geological Modeling
  • Computational Science

Background:

  • MODFLOW models require continuous grid layers, complicating the simulation of complex geological features like pinchouts.
  • Traditional methods struggle to accurately represent intricate stratigraphy within MODFLOW's structured grid system.

Purpose of the Study:

  • To develop an automated method for generating MODFLOW-compatible grids from solid models.
  • To overcome limitations in simulating complex stratigraphy within MODFLOW.

Main Methods:

  • Utilized boundary-representation solid models, originally from computer-aided design, to define complex 3D stratigraphy.
  • Extracted elevations from solid models to create continuous layers compatible with MODFLOW requirements.
  • Described two approaches: adjusting grid elevations to solid model boundaries or creating a regular grid and modifying material properties.

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Main Results:

  • Successfully generated MODFLOW-compatible grids from complex solid model stratigraphy.
  • Demonstrated a grid-independent definition of layer elevations, facilitating rapid grid recreation after resolution changes.

Conclusions:

  • Solid models offer a robust solution for representing complex stratigraphy in MODFLOW.
  • The automated grid generation method enhances the flexibility and efficiency of hydrogeological modeling.