1. Beachfront Development at Jamaica Beach, Galveston Bay
Haiyan Yang
CE394K
GIS in Water Resources

2. Introduction: Hurricanes Love Galveston
1900~2000: more than 60 recorded hurricanes hit Galveston
1900 Hurricane: killed over 8000 people
1961 Hurricane Carla: brought storm surge 10 miles inland
1983 Hurricane Alicia: most expensive

3. Purpose Tradeoff: Beachfront view Awesome Beachfront disaster Horrible
How did disasters affect beaches?
Development pattern:
Past & Future

7. Data Sources Methods Raster Data Processing: Scan at 800 dpi
Georeference to UTM 15
Vector Data Creating:
Digitizing

8. Scanned Photograph
Aug 22, 1983: 4 days after Hurricane Alicia

9. Reduced Images (Left) May 5, 1958 (Below) Sep 14, 1961
(4 days after Hurricane Carla)

10. Georeferencing in ArcMap
Rotate
Shift

11. Add Control Points
Magnifier Window: Amazing!

12. Linked Ground Control Points

13. RMS Error
Experience:
Good to have RMS Error less than 15

14. Georeferenced Beach
May 5, 58
2 buildings
Sep 14, 61
> 25 buildings

15. Beach after Hurricane Alicia
Aug 22, 1983
More buildings!

16. Digitizing Shoreline and Washover
Shoreline Erosion: Approximate 80m

17. Conclusions Beachfront area: In the past Erosion occurred
Buildings constructed
In the future
Erosion continues
Development? ? ?

18. Advice
Beach is disaster-prone
Move away!