Beachfront Development at Jamaica Beach, Galveston Bay

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Presentation transcript:

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

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

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

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

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

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

Georeferencing in ArcMap Rotate Shift

Add Control Points Magnifier Window: Amazing!

Linked Ground Control Points

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

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

Beach after Hurricane Alicia Aug 22, 1983 More buildings!

Digitizing Shoreline and Washover Shoreline Erosion: Approximate 80m

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

Advice Beach is disaster-prone Move away!