Hydrodynamic Modeling of Lavaca Bay: through the use of GIS and Elcom

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Hydrodynamic Modeling of Lavaca Bay through the
use of GIS and Elcom

• SarahKelly Delavan
• Environmental and Water Resources Engineering

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Outline

• Backround-the where and the why
• Discussion of Elcom
• Previous work by Jordon Furnans
• New model created
• Conclusions and Future work

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Lavaca Bay
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Elcom

• Hydrodynamic modeling tool
• Takes wind, precipitation, shape of waterbody,
  tidal currents, etc.
• Gives us magnitude and direction of velocity of
  the water

Flow across grid can Only move vertically and
Horizontally-not diagonally.
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Jordan Furnans Previous Work

• Acquired sounding data for the bay system from
  the National Geophysical Data Center.
• These points give x,y, and z coordinates for the
  depth of the bay system.

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• A grid was interpolated from the sounding data
• A clip of the grid using the shape of the Bay
  was created
• A few more adjustments in GIS
• Preparation of Elcom input files
• Elcom exported velocity data as Mat lab files

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New Model Creation

• Diagonal flow direction with vertical/horizontal
  grid
• Rotation of both sounding data points and outline
  of Lavaca Bay

With these two, we can create and Clip a grid
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With a few more magical steps, we can now input
the Grid into Elcom to obtain velocity results.
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Conclusions and Future work

• A new model was created to address the problem
  with diagonal velocity direction
• This model is ready to be converted into input
  files to be analyzed by Elcom
• Comparison of old model and new model
• Incorporate into future research

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Thank you

• Dr. Maidment
• Jordan Furnans
• CRWR Crew