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Sea Level Rise in Galveston, Miami and New York

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Sea Level Rise in Galveston, Miami and New York. Maelle LIMOUZIN November 18, 2008. Background on sea level rise. Consequence of global warming through two principal processes: Thermal expansion of water Melting of glacial ice

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Sea Level Rise in Galveston, Miami and New York

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  1. Sea Level Rise in Galveston, Miami and New York Maelle LIMOUZIN November 18, 2008

  2. Background on sea level rise • Consequence of global warming through two principal processes: • Thermal expansion of water • Melting of glacial ice • Great differences due to currents and coasts and sea-beds configurations • Possible consequences : • Important floods in many cities and islands in the world, • Change in groundwater quality, • Losses of natural coastal habitats and coastal erosion…

  3. Sea level trends From NOAA tides and currents

  4. Locations

  5. Data • National Elevation Dataset from USGS seamless server • Shorelines from National Geodetic Survey NOAA Shoreline Data Explorer • Roads and Rails from ESRI Census 2000 TIGER/Line® Shapefiles • Land cover use from USGS

  6. Miami map 8 different layers = 8 different scales -> adapted display Miami

  7. Miami in 50 yearssea level + 119.5 mm = 0.392 ft

  8. Miami in 100 yearssea level + 239 mm = 0.784 ft

  9. Miami in 200 yearssea level + 478 mm = 1.568 ft

  10. Galveston map Galveston

  11. Galveston in 50 yearssea level + 342 mm=1.122 ft

  12. Galveston in 100 yearssea level + 684 mm=2.244 ft

  13. Galveston in 200 yearssea level + 1.37 m = 4.495 ft

  14. Galveston in 200 yearssea level + 1.37 m = 4.495 ft

  15. Land cover use cultivated crops developed area Emergent herbaceous wetlands

  16. Suggestions for Galveston • Levees and dikes around critical areas • Seal off the entire Galveston Bay during storm attack as in Netherlands

  17. Conclusions • Sea level rise can be a real threat • Populations may have to be displaced • Long-term solutions have to be found during the next decades HOWEVER, • Estimation really approximate • Future behavior unknown

  18. Future work • New York map • More precise analysis of the consequences • Suggest solutions for Miami and New York

  19. Sea Level Rise in Galveston, Miami and New York Questions ? vvv vvv vvv

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