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Parallel Processing Transport Model MT3DMS by Using OpenMP.

Linxian Huang1,2, Lichun Wang3, Jingli Shao4

  • 1School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China. stu_huanglx@ujn.edu.cn.

International Journal of Environmental Research and Public Health
|May 26, 2018
PubMed
Summary
This summary is machine-generated.

Parallelizing MT3DMS using OpenMP significantly speeds up groundwater solute transport simulations. This enhanced efficiency enables high-resolution modeling for large-scale problems, overcoming previous computational bottlenecks.

Keywords:
MT3DMSOpenMPparallel computingsolute transport modeling

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Area of Science:

  • Environmental Science
  • Hydrogeology
  • Computational Science

Background:

  • Groundwater solute transport modeling is crucial for understanding contaminant movement and reactions.
  • Traditional serial simulators face computational bottlenecks (time and memory) for large-scale problems.
  • Existing limitations hinder the widespread application of accurate numerical groundwater simulations.

Purpose of the Study:

  • To develop and assess a parallelized version of the MT3DMS (Modular Three-Dimensional Multispecies Transport Model) simulator.
  • To accelerate solute transport simulation processes for large-scale groundwater systems.
  • To overcome the computational limitations of traditional serial numerical simulators.

Main Methods:

  • Parallelization of MT3DMS using OpenMP (Open specifications for Multi-Processing) directives.
  • Targeted parallelization of computationally intensive packages: Advection (ADV), Dispersion (DSP), and Generalized Conjugate Gradient Solver (GCG).
  • Evaluation of two parallelization strategies for models with varying layer counts and assessment of preconditioners in the GCG package.

Main Results:

  • Parallelized MT3DMS achieved up to 4.15 times faster simulation run times compared to the sequential version.
  • A modified strategy for few-layer models demonstrated a two-fold speedup over sequential simulation.
  • The parallelized approach effectively distributes memory and computational load across multiple processors.

Conclusions:

  • OpenMP-based parallelization of MT3DMS offers a significant improvement in computational efficiency for groundwater solute transport modeling.
  • The developed method enables high-resolution simulations for large-scale and multimillion-cell problems.
  • This advancement facilitates wider application of numerical simulations in groundwater management and research.