1. Hydrodynamic Modeling of Lavaca Bay: through the use of GIS and Elcom
SarahKelly Delavan
Environmental and Water Resources Engineering

2. Outline: Backround-the where and the why Discussion of Elcom
Previous work by Jordon Furnans
New model created
Conclusions and Future work

3. Lavaca Bay

4. 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.

5. Jordan Furnan’s 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.

6. 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

7. 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

8. With a few more magical steps, we can now input the
Grid into Elcom to obtain velocity results.

9. 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

10. Thank you;
Dr. Maidment
Jordan Furnans
CRWR Crew