Sometimes natural processes or people extend the coastlines. While land's edges on a map seem well-defined and permanent, coastlines are always shifting. 13) caused an estimated 328 square miles (850 square kilometers) of coastal land loss in Louisiana-an area the size of more than 150,000 football fields.
The first study to do so, published in 2009, found that the almost back-to-back hurricanes of 2005 (Katrina on Aug. We all know that hurricanes can have destructive effects on human communities and infrastructure-but what about their effects on coastal wetlands? Until Hurricane Katrina, no one had ever mapped hurricane-caused land loss in Louisiana, where a staggering 90 percent of coastal wetland loss in the United State's contiguous 48 states occurs.
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