Louisiana Coastal Elevations Slides from Prof. Roy Dokka.

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Presentation transcript:

Louisiana Coastal Elevations Slides from Prof. Roy Dokka

Global sea-level has been constant over the past 100 years. Global sea-level has been slowing since the last glacial maximum. The Seas Are Rising

Gulf of Mexico

The Paradigm (red) underpinning plans to restore the Louisiana coast cannot explain the observed subsidence. It is not just the wetlands, it is entire coast. Plans to save the coast based on red rates. 8.3’ 2.0’ 2.7’ 0.0’ 6.0’ 4.0’ 5.4’ 6.0’ 4.0’ >3.5’ ’ 0.0’ 0-0.1’ 1.1-2’ 0.0’ 1.5’ 0.0’

2010 DEM Elevations 8.9% Land Area at or below Sea Level 8.9% Land Area at or below Sea Level Approximately 897 miles 2 (2.3 million km 2 ) Approximately 897 miles 2 (2.3 million km 2 )

2050 DEM Elevations 15.5% Land Area at or below Sea Level 15.5% Land Area at or below Sea Level Approximately 1,558 miles 2 (4 million km 2 ) Approximately 1,558 miles 2 (4 million km 2 )

2100 DEM Elevations 27.1% Land Area at or below Sea Level 27.1% Land Area at or below Sea Level Approximately 2,724 miles 2 (7 million km 2 ) Approximately 2,724 miles 2 (7 million km 2 )