TOOLS TO MODEL TEXAS ESTUARIES Solomon Negusse, Dharhas Pothina - - PowerPoint PPT Presentation

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TOOLS TO MODEL TEXAS ESTUARIES Solomon Negusse, Dharhas Pothina - - PowerPoint PPT Presentation

Jan 10, 2023 237 likes •445 views

THE OPEN ESTUARY: USING OPEN SOURCE TOOLS TO MODEL TEXAS ESTUARIES Solomon Negusse, Dharhas Pothina Modeling Bays and Estuaries Predictive modeling needs: Environmental flow needs Assisting navigation Oil spill Study impact of

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THE OPEN ESTUARY: USING OPEN SOURCE TOOLS TO MODEL TEXAS ESTUARIES

Solomon Negusse, Dharhas Pothina

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Modeling Bays and Estuaries

Predictive modeling needs:

  • Environmental flow needs
  • Assisting navigation
  • Oil spill
  • Study impact of man made changes to the

bays.

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Hydrodynamic Model

Numerical Formulation of Governing Equations

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SLIDE 4

Hydrodynamic Model

Numerical Formulation of Governing Equations

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Numerical Formulation of Governing Equations

Hydrodynamic Model

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Numerical Formulation of Governing Equations

Hydrodynamic Model

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Numerical Formulation of Governing Equations

Hydrodynamic Model

Water level, velocity, salinity temperature prediction at computational elements

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Selfe Model Applications

  • An open source hydrodynamic code written

in fortran.

  • Solves 3D physical variables(Free surface

elevation, velocity), Temperature & Salinity

  • Coded with mpi and run on in‐house HPC

cluster

  • Finite element model – run on unstructured

triangular mesh

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SLIDE 9

SELFE Model work flow

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Computation Grid Generation

  • Surface Modeling Systems software
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SLIDE 11
  • Good resolution control, grid modification

tools.

  • Nice user friendly Interface (kind of).
  • Still a lot of limitations:
  • available for windows os only, crashes a lot,

doesn’t handle big grids well.

  • Interpolation of bathymetry on to grid not

efficient

Computation Grid Generation

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Interpolation in SMS

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Anisotropic stretched IDW interpolation in python

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IDW in SMS

Stretched Anisotropic Interpolation w/ Python

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More input file processing

  • Pwl_interp.py
  • Usgsflow_interp.py
  • 2dm2gr3.py
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Output Processing and Visualization

  • Pyselfe: python class for model output storage and

access.

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Output Processing and Visualization

  • Matplotlib 2d plots.
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Field data for Calibration and Validation

  • Python INstrumentationToolkit (PINT):

putting data to common format

  • Pyhis : access timeseries data on the web

from different sources

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Output Processing and Visualization

  • Selfe2tec2D.py
  • Converts data to

structured data format.

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Conclusion and feature goals

  • Efficiency has improved through automation
  • Improved accuracy
  • Enhanced visualization capability

Goals:

‐ visualization with Mayavi, viSit, ‐ Making codes available for contribution ‐ Generic code structure with ability to write

translators for other hydro models inputs