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Hurricane Katrina Flood Impacts

Hurricane Katrina Flood Impacts. K. Van Wilson, P.E. USGS Mississippi Water Science Center. The Inevitable Comparison. Hurricane Camille Category 5 August 17, 1969 Hurricane Katrina Category 4 August 29, 2005.

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Hurricane Katrina Flood Impacts

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  1. Hurricane Katrina Flood Impacts K. Van Wilson, P.E. USGS Mississippi Water Science Center

  2. The Inevitable Comparison Hurricane Camille Category 5 August 17, 1969 Hurricane Katrina Category 4 August 29, 2005

  3. The Inevitable Comparison Hurricane Camille • Most intense hurricane in US history • Maximum winds - 190+ mph • Central pressure – 909 mb (2nd lowest on record) • Maximum storm surge – 25 ft (nr Pass Christian, MS) • Width of storm - 110 miles • Death toll - 256 • Damage - $1.4 Billion

  4. The Inevitable Comparison Hurricane Katrina • Most destructive hurricane in US history • Maximum winds - 140 mph • Central pressure – 920 mb (3rd lowest on record) • Maximum storm surge – 29 ft (nr Bay St. Louis, MS) • Width of storm - 250 miles • Death toll – 1300 ? • Damage - $200 Billion ?

  5. Rainfall and Flooding

  6. Rainfall and Flooding

  7. Storm Surge

  8. High Water Mark (HWM) Examples

  9. Storm Surge

  10. Recorded Storm-Surge Hydrographs at Selected River Gages • Stage • Specific Conductance (saltwater intrusion identifier)

  11. Storm Surge Escatawpa River Gage

  12. Escatawpa River about 10.5 miles upstream of mouth (Station no. 0248018020)

  13. Storm Surge Pascagoula River Gage

  14. Pascagoula River about 34.4 miles upstream of mouth (Station no. 02479310)

  15. Storm Surge above Camille

  16. Katrina Storm-Surge Inundation

  17. Comparison of selected Katrina HWMs along a coastal baseline

  18. Storm Surge WindSpeed Modeling conducted by: Mississippi State University GeoResources Institute Stennis Space Center Model and Supercomputer provided by: WorldWinds Inc. Stennis Space Center

  19. Storm Surge WindSpeed Modeling conducted by: Mississippi State University GeoResources Institute Stennis Space Center Model and Supercomputer provided by: WorldWinds Inc. Stennis Space Center

  20. Storm Surge WindSpeed Modeling conducted by: Mississippi State University GeoResources Institute Stennis Space Center Model and Supercomputer provided by: WorldWinds Inc. Stennis Space Center

  21. Storm Surge WindSpeed Modeling conducted by: Mississippi State University GeoResources Institute Stennis Space Center Model and Supercomputer provided by: WorldWinds Inc. Stennis Space Center

  22. Storm Surge WindSpeed Modeling conducted by: Mississippi State University GeoResources Institute Stennis Space Center Model and Supercomputer provided by: WorldWinds Inc. Stennis Space Center

  23. Storm Surge WindSpeed Modeling conducted by: Mississippi State University GeoResources Institute Stennis Space Center Model and Supercomputer provided by: WorldWinds Inc. Stennis Space Center

  24. Storm Surge WindSpeed Modeling conducted by: Mississippi State University GeoResources Institute Stennis Space Center Model and Supercomputer provided by: WorldWinds Inc. Stennis Space Center

  25. Storm Surge WindSpeed Modeling conducted by: Mississippi State University GeoResources Institute Stennis Space Center Model and Supercomputer provided by: WorldWinds Inc. Stennis Space Center

  26. Storm Surge WindSpeed Modeling conducted by: Mississippi State University GeoResources Institute Stennis Space Center Model and Supercomputer provided by: WorldWinds Inc. Stennis Space Center

  27. Bridge Damage & Bed Scour

  28. Cross-section profile 150 feet North of U.S. Highway 90 at St. Louis Bay. 5.0 Sept. 19, 2005 Aug. 24, 2000 0.0 8 8 9 -5.0 1 D V A N , t -10.0 e e f n i n o i t a -15.0 v e l E -20.0 120 127 133 I RIGHT LEFT IV (WEST) (EAST) JETTY JETTY -25.0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 + + + + + + + + 2 6 8 0 8 0 2 4 3 2 3 2 1 2 2 2 3 3 3 3 3 3 3 3 Bridge Damage & Bed Scour

  29. Comments or Questions? K. Van Wilson, P.E. USGS Mississippi Water Science Center

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