Grand Challenges in Coastal Engineering

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Grand Challenges in Coastal Engineering

• Billy L. Edge
• Feb. 23, 2009
• OCEN 201

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The Grand Challenges

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Outline

• Coastal Engineering
• Beaches
• Coastal Structures
• Extreme Events
• Challenges

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beaches
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BEACH RECREATION
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Mar Del Plata, Argentina
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BEACH RECREATION

• Travel Tourism is Largest Industry in US and
  World
• Travel Tourism is Largest Employer in US
• 40 of Americans List Beaches as No 1
  destination for vacations

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Annual Tourist Visits to National Parks - millions
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Destin, Florida
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Cutterhead Dredge
1,000,000 Mob Demob
5 12 per cubic yard
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Navarre Beach, FL
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Nourishment with StructuresHilton Head Island, SC
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Sediment Budgets
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New Kitty Hawk Inlet Post Isabel
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Isabel at Kitty Hawk, North Carolina
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Coastal Structures
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Coastal Structures
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MCR North Jetty
1939
North head
What was a spending beach for wave action along
the ocean side of the north jetty no longer
exists. Now waves and currents act directly on
much of the north jetty. The north jetty is now
compromised along much of its length.
Shoreline before north jetty construction 1912
Benson Beach named after the Admiral Benson wreck
2002

View to NE
North head
Beach has receded 2,000 ft since 1939


North Jetty Head - 1700 ft loss in length
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Port and Harbor Structures
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Outer breakwater
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Deepwater Challenges for Port Development
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South Lake Worth Inlet, FL
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Sand Rights

• Human and human induced actions will not
  interfere, diminish, modify or impede sand and
  other sediments or materials from being
  transported to and along beaches, shores, or any
  flowing or eolian paths or bodies without
  appropriate restitution being made.
• Magoon and Edge, 1999

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Rindge Dam Malibu Creek, CA
Anthropogenic Impacts
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Atlantic Nuclear Generating Station
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Sines, Portugal, 1978
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80 90 t Dolos Armor
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Port of Houston - Barbours Cut
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Port of Hong Kong
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Extreme Events
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Hurricane Katrina
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Hurricane Katrina August 29, 2005

• In New Orleans and southeast Louisiana
• 1,100 people killed, gt135 still missing
• Flooding covered 80 percent of the city to depths
  of 10 feet (3 m)
• 400,000 people fled
• 125,000 jobs lost
• 21 billion in damages to residences and
  businesses
• 7 billion in damages to infrastructure
• Total communities destroyed

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US 90 between Bay St Louis Pass Christian (West
View)
Forensic Engineering
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Katrina Flooding
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Levee Failure
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Sines, Portugal - 1978
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(No Transcript)
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Hurricane Ike
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Tsunami impacts
From The Day After Tomorrow
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Challenges-1

• Rehabilitation of coastal infrastructure
• Inland impacts of tsunamis and storm surges
• Physics based sediment transport in surf zones
• Sand starved shorelines (muddy coasts)

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Challenges-2

• Determine the prudent return period (risk)
• Population of storm events
• Rapid bathymetry in the forbidden zone
• Sustainable Coastal
• Development
• Modeler or Engineer

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The Grand Challenges

• Growth of Coastal Population
• Global Climate Change
• Future Engineer Shortage