1.7 Sinking Lousiana Flashcards

1
Q

Isostatic rise

A

Land sinks at the coast
Sediment is deposited in river deltas which increases weight put on it
There is more Cristal sag and delta subsistence

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2
Q

Where does the Mississippi River flow into

A

Gulf of Mexico

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3
Q

What type of coast

A

Alluvial, Deposition all coat

Marshes, swamps and barrier islands

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4
Q

What is it vulnerable too

A

Storm surges
Global sea level rise
Isostatic tectonic uplift

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5
Q

Up to how many mm per year is the coast rising by

A

3/4

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6
Q

What is it experiencing that causes uplift

A

Post glacial rebound

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7
Q

How tall are the flood walls and where r they

A

23ft Mississippi River

17.5 foot lake portchurtain shoreline

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8
Q

What does the flood wall protect from

A
Erosion from storm surges
University campus
Cathedral
Elspenade
Boulevard
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9
Q

How do submergent cosst form

A

Relative rise in sea level

Relative fall results in emergent (offshore bars, raised beaches etc)

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10
Q

What else influences coastline

A

Wave type
Topography
Rock structure
Disposition

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11
Q

What if

A
Landscape was complicated
Sea levels changed on different scales (eg tides on beaches)
Storm surges that r dramatic
Sea level rise 
Do we ever get a balance
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