1.7 Sinking Lousiana Flashcards
Isostatic rise
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
Where does the Mississippi River flow into
Gulf of Mexico
What type of coast
Alluvial, Deposition all coat
Marshes, swamps and barrier islands
What is it vulnerable too
Storm surges
Global sea level rise
Isostatic tectonic uplift
Up to how many mm per year is the coast rising by
3/4
What is it experiencing that causes uplift
Post glacial rebound
How tall are the flood walls and where r they
23ft Mississippi River
17.5 foot lake portchurtain shoreline
What does the flood wall protect from
Erosion from storm surges University campus Cathedral Elspenade Boulevard
How do submergent cosst form
Relative rise in sea level
Relative fall results in emergent (offshore bars, raised beaches etc)
What else influences coastline
Wave type
Topography
Rock structure
Disposition
What if
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