Preliminary Data Hurricane Katrina Canal Breachings, 17 th Street, - - PowerPoint PPT Presentation

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Preliminary Data Hurricane Katrina Canal Breachings, 17 th Street, - - PowerPoint PPT Presentation

Dec 01, 2023 272 likes •710 views

Preliminary Data Hurricane Katrina Canal Breachings, 17 th Street, London Avenue and Industrial Canal Dr. Ivor van Heerden Director Center for the Study of Public Health Impacts of Hurricanes, Deputy Director LSU Hurricane Center

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Preliminary Data – Hurricane Katrina Canal Breachings, 17th Street, London Avenue and Industrial Canal

  • Dr. Ivor van Heerden

Director Center for the Study of Public Health Impacts of Hurricanes, Deputy Director LSU Hurricane Center Louisiana State University

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Advisory 18, Submitted Saturday 2200

“New Orleans Will Flood”

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10 M SPOT Satellite Image: 2 Sept 2005

DeWitt Braud and Rob Cunningham

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10 M SPOT Satellite Image: 2 Sept 2005 With Water depth overlays – Orleans East

Flood elevation: +1ft NAVD 88 2 Sept 2005

DeWitt Braud and Rob Cunningham

Industrial Canal Overwash Levee Degradation Levee Degradation Levee Overtopping

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Scour Trench from Overtopping for 3 hours

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10 M SPOT Satellite Image: 2 Sept 2005 With Water depth overlays

17th Street canal break

Flood elevation: +3ft NAVD 88

DeWitt Braud and Rob Cunningham

London Ave Canal Breaks Industrial Canal Overwash

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General Levee Construction Preliminary Data

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Hurricane Katrina Surge at the Industrial Canal & Lake at the 17th Street Canal IC-Peak at 0830 AM; Lake Peak 0900 AM 2 4 6 8 10 12 14 16 8/29/05 0:00 8/29/05 6:00 8/29/05 12:00 8/29/05 18:00 8/30/05 0:00 Date & Time (CDT) Surge (ft)

  • Ind. Canal N216818

Lake @ 17th Canal N206324

17th Street Canal Breach

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17th Street Canal – Note displaced levee section in middle of the breach, which moved 35 feet

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08/30/05

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Earth berm and fence moved 35 feet laterally (heave) by water pressure 17th Street Wood and organic matter

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17th Street Canal -‘Heaved’ yard behind levee wall that moved 35 feet laterally

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Old swamp cyprus stumps exposed by scour

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17th Street Breach – Preliminary Data

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17th Street Canal - Aerial Sketch Preliminary Data

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London Ave Canal – Filmore Breach

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Clubhouse (as built) at base of levee soil embankment - London Ave Canal west

  • breach. Note pine tree location on left.

Daniel Cantrell

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Club house and pine tree after heave – London Ave Canal west breach, rose 6-8 feet! Daniel Cantrell

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London Ave Canal bowed wall segments near Filmore Road, east side of canal

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London Ave Canal – Large ‘sand boil’ at base of levee soil embankment, east side

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London Ave Canal – Heaves In yard, tilted flower bed and buildings, east side.

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London Ave - Filmore Breach – Preliminary Data

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Mirabeau Break on London Ave.

LOTS OF SAND!

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Blowout hole?

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Mirabeau Breach – Blowout Preliminary Data

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Hurricane Katrina Surge at the Industrial Canal & Lake at the 17th Street Canal IC-Peak at 0830 AM; Lake Peak 0900 AM 2 4 6 8 10 12 14 16 8/29/05 0:00 8/29/05 6:00 8/29/05 12:00 8/29/05 18:00 8/30/05 0:00 Date & Time (CDT) Surge (ft)

  • Ind. Canal N216818

Lake @ 17th Canal N206324

Industrial Canal Breachings

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4 Sept 2005

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Levee Failure on East Side of Industrial Canal

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15 Sept 2005

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Scour Trench from

  • vertopping of levee
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Paint from barge?

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Note: ‘R’ bars bent horizontal while wall at 45 degree angle – barge bottom move across after wall collapsed?

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Curved wall – why? Scour Trench Embankment failure

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Levee wall tilted back. Cracks and soil failure in front of wall and development

  • f downward percolation holes
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Cyprus tree stump from Old swamp floor

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Industrial Canal Levee failure – preliminary data

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Escape Hole Over 1000 Louisianan’s perished from the Katrina floods Approximately 100,000 Families are now homeless, most of whom heeded evacuation orders. They believed in the security of the levee systems. What happens to them?