Figure 16. Sketch of sediment deposition and flood shoal development 



by horizontal expansion 19 



Figure 1 7. Southwest comer of Sundown Island and channel range marker, 



as seen from the MSC upon entering the bay (May 1997) 20 



Figure 18. Portion of northeast perimeter of Sundown Island, with barge tow 



in the GIWW, far left (May 1997) 20 



Figure 19. Numerical grid including the offshore, Matagorda Bay, and 



communicating bays 23 



Figure 20. Numerical grid in vicinity of the MSC-GIWW intersection 23 



Figure 2 1 . Locations of deployed ciurent meters and numerical gauges 26 



Figure 22. Time series of wind speed measured at the East Matagorda 



station 28 



Figure 23. Time series of wind direction measured at the East Matagorda 



station 29 



Figure 24. Time series of water-surface elevation measured at Galveston 



Pleasure Pier 29 



Figure 25. Time series of water-surface elevation measured at Port Lavaca 



station 30 



Figure 26. Comparison of calculated and measured velocities at sta 1 31 



Figure 27. Comparison of calculated and measured velocities at sta 2 32 



Figure 28. Comparison of calculated and measured water-surface elevations 

 at Port Lavaca station (East Matagorda winds were specified 

 in model) 32 



Figure 29. Comparison of calculated and measured water-surface 

 elevations at Port Lavaca station (Lavaca Bay winds 

 specified in model) 33 



Figure 30. Comparison of calculated and measured discharges at MSC 



entrance for YD 253 34 



Figure 3 1 . Comparison of calculated and measured discharges at 



Pass CavaUo for YD 253 34 



