NOAA – Underwater: Land loss in coastal Louisiana since 1932

by Sabrina I. Pacifici on April 17, 2013

“Every year, 25-35 square miles of land off the coast of Louisiana—an area larger than Manhattan–disappears into the water due to a combination of subsidence (soil settling) and global sea level rise. The maps above show how much land has been lost to the Gulf of Mexico in the past 80 years…In Southeast Louisiana, relative sea level is rising at a rate of three feet every one hundred years, according to sixty years of tidal gauge records. Relative sea level refers to the change in sea level compared to the elevation of the land, which can be due to a combination of global sea level rise and subsidence—the settling and sinking of soil over time.”

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