What an incredible dumb ass you are, Liberty, didn't you expect someone to look at the link?
NOAA Magazine Online (Story 101)
SUBSIDENCE AND SEA LEVEL RISE IN LOUISIANA:
A STUDY IN DISAPPEARING LAND
NOAA is Helping to Measure and Monitor the Effects of Subsidence, Sea Level Rise and Coastal Storms
In order to assess the rate of subsidence and measure relative sea level rise in Louisiana, up-to-date geodetic and water level data are needed. Unfortunately, most of this data are more than two decades old and data relationships between tide and geodetic datums are not well known. However, in cooperation with state and local agencies, the NOAA Ocean Service is implementing a two-stage (near-term and long-term) approach to address coastal subsidence issues.
Smart enough to realize the land is sinking and not being overrun by sea level rises from melting glaciers. Unlike you and the poster I originally addressed. Care to know why the land is sinking and disappearing? The US government built levies which restricted the flow of soil to the delta areas. Without the replentishing of the delta, it erodes. Of course, you still don't get the first part, so I don't expect the latter will be understood either.
Now look, my pretty little idiot child. The soil is not eroding to any appreciable degree. It is compacting as more soil is added. Of course, one could look this up for oneself.
http://www.tulane.edu/~tor/documents/NG2008.pdf
Coastal subsidence causes sea-level rise, shoreline
erosion and
wetland loss, which poses a threat to coastal populations1. This
is especially evident in the Mississippi Delta in the southern
United States, which was devastated by Hurricane Katrina in
2005. The loss of protective wetlands is considered a critical
factor in the extensive flood damage. The causes of subsidence
in coastal Louisiana, attributed to factors as diverse as shallow
compaction and deep crustal processes, remain controversial2–11.
Current estimates of subsidence rates vary by several orders
of magnitude3,6. Here, we use a series of radiocarbon-dated
sediment cores from the Mississippi Delta to analyse late
Holocene deposits and assess compaction rates. We find that
millennial-scale compaction rates primarily associated with peat
can reach 5mm per year, values that exceed recent model
predictions5,9. Locally and on timescales of decades to centuries,
rates are likely to be 10mm or more per year. We conclude
that compaction of Holocene strata contributes significantly to
the exceptionally high rates of relative sea-level rise and coastal
wetland loss in the Mississippi Delta, and is likely to cause
subsidence in other organic-rich and often densely populated
coastal plains.
5 mm of subsidence, added to 3.4 mm of sea level rise equals a very rapid change in relative levels of sea and land. While the rate of subsidence is not likely to increase, the rate of sea level rise certainly will.