louisiana coastal elevations
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Louisiana Coastal Elevations. Slides from Prof. Roy Dokka. The Seas Are Rising. Global sea-level has been slowing since the last glacial maximum. Global sea-level has been constant over the past 100 years. Gulf. of. Mexico. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Louisiana Coastal Elevations](https://reader036.vdocuments.site/reader036/viewer/2022062222/568160ff550346895dd03e8c/html5/thumbnails/1.jpg)
Louisiana Coastal Elevations
Slides from Prof. Roy Dokka
![Page 2: Louisiana Coastal Elevations](https://reader036.vdocuments.site/reader036/viewer/2022062222/568160ff550346895dd03e8c/html5/thumbnails/2.jpg)
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
![Page 3: Louisiana Coastal Elevations](https://reader036.vdocuments.site/reader036/viewer/2022062222/568160ff550346895dd03e8c/html5/thumbnails/3.jpg)
Gulf
of
Mexico
![Page 4: Louisiana Coastal Elevations](https://reader036.vdocuments.site/reader036/viewer/2022062222/568160ff550346895dd03e8c/html5/thumbnails/4.jpg)
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’
>3.5’2.1-3.5’
2.1-3.5’
0.0’ 0.0’0.0’
0-0.1’
1.1-2’
0.0’
1.5’0.0’
![Page 5: Louisiana Coastal Elevations](https://reader036.vdocuments.site/reader036/viewer/2022062222/568160ff550346895dd03e8c/html5/thumbnails/5.jpg)
2010 DEM Elevations• 8.9% Land Area at or below Sea
Level• Approximately 897 miles2
(2.3 million km2)
![Page 6: Louisiana Coastal Elevations](https://reader036.vdocuments.site/reader036/viewer/2022062222/568160ff550346895dd03e8c/html5/thumbnails/6.jpg)
2050 DEM Elevations• 15.5% Land Area at or below Sea
Level• Approximately 1,558 miles2
(4 million km2)
![Page 7: Louisiana Coastal Elevations](https://reader036.vdocuments.site/reader036/viewer/2022062222/568160ff550346895dd03e8c/html5/thumbnails/7.jpg)
2100 DEM Elevations• 27.1% Land Area at or below Sea Level• Approximately 2,724 miles2
(7 million km2)
![Page 8: Louisiana Coastal Elevations](https://reader036.vdocuments.site/reader036/viewer/2022062222/568160ff550346895dd03e8c/html5/thumbnails/8.jpg)
ORLEANS
JEFFERSON
PLAQUEMINES
ST BERNARD
TERREBONNE
LAFOURCHE
ST CHARLES
ST MARY
CAMERON
VERMILION
IBERIA
ST MARTIN
ASSUMPTION
CALCASIEU
IBERVILLE
JEFFERSON DAVIS
LAFAYETTE
54.1%
34.0%
26.9%
18.7%
10.4%
11.1%
11.7%
14.7%
<7%
6.5%
3.8%
73.2%
43.7%
46.4%
35.7%
29.7%
25.4%
20.3%
22.3%
<11%
7.6%
6.2%
85.3%
68.3%
62.9%
53.2%
60.9%
60.6%
61.8%
29.3%
15.4%
13.1%
16.8%
< 12%
< 7%
< 3%
< 2%
< 1%
< 0%
Percent Land Below Sea Level by Parish Through 2100
2010 2050 2100