Beachfront Development at Jamaica Beach, Galveston Bay - PowerPoint PPT Presentation

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Beachfront Development at Jamaica Beach, Galveston Bay

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Beachfront Development at Jamaica Beach, Galveston Bay. Haiyan Yang. CE394K ... Beachfront area: In the past. Erosion occurred. Buildings constructed. In the future ... – PowerPoint PPT presentation

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Title: Beachfront Development at Jamaica Beach, Galveston Bay


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

2
Introduction Hurricanes Love Galveston
  • 19002000 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
4
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5
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6
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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
Shift
Rotate
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 gt 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!
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