The Impact of 2004 Hurricane Season on Beach Erosion in Volusia County, Florida

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The Impact of 2004 Hurricane Season on Beach
Erosion in Volusia County, Florida

• Valentina David
• Bethune-Cookman College
• Daytona Beach, FL 32114
• NASA Summer Faculty Research Opportunities
• June 6 August 12, 2005
• DeNeice Guest
• Science Systems And Applications, Inc.

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Significance of Beach

• Revenue source
• Tourist attraction
• Economic growth
• Coastal habitat
• Exotic vegetation
• Turtle nesting

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Tourism in Volusia county, Revenue

• 9.5 million tourists
• Spent 3.7 billion (435/person)
• Tourist Tax is 4,536,520
• Convention tax is 6,908,644
• Economic impact of events is 612 million
• Events are Speed week, bike week, Spring break,
  Independence day.
• http//floridabusiness.org/impact.htm

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Outline

• 2004 hurricane season
• Study area description
• Methodology
• Change detection analysis
• Quantification of beach loss
• Conclusion

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2004 Hurricane Season

• 16 Storms
• 8 Hurricanes
• 4 Hitting Florida
• 3 Cross over Volusia County
• Charley
• Frances
• Jeanne
• 42 million dollars in damages

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Hurricane Charley August 9-14, 2004
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Hurricane FrancisAugust 25-September 10, 2004
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Hurricane JeanneSeptember 13-27, 2004
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Methodology

• Acquire Landsat TM 30m data, 1999 and 2004
• Erdas Imagine 8.7
• Define study area using county vector map
• Subset imagery
• DOQQ for Volusia County 2000, 2004
• Unsupervised classification
• Break out mixed clusters
• Supervised classification
• Majority filter
• Final recode for classification map
• Accuracy Assessment
• Change detection

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Study Area
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Study Area
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Erosion Examples
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Erosion Examples
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Erosion Examples
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Target Class for evaluation

• Beach, from back shore to foreshore

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Accuracy Assessment
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Change Detection
Ponce Inlet, New Smyrna
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Change Detection
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Conclusion

• Landsat TM data was successful in identifying
  beach erosion in Volusia County, Florida
• Net loss of beach was 1.83 mi2
• Cost to the county, in beach replenishment was 6
  8 millions for 800,000yd3 in 6 miles of beach
• This information can be used by Volusia County
  Managers in a Decision Support System to
  determine the most effective area for beach
  replenishment
• In future Remote Sensing technique may be useful
  for a quick beach erosion assessment

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Future Plans

• Ground truthing
• Meet with Volusia County managers to discuss the
  results
• Acquire Landsat image for 2005 for continuation
  of beach erosion study
• Involve students from Bethune-Cookman College in
  the studies

• Completed
• Collaboration is continued
• Not yet, need grant or financial support
• One Physics major student is doing senior
  research project.