The continuing effects of saltwater intrusion driven by Katrina can be still seen in the wilting trees and plants far from the coast. The inland saltwater intrusion caused the state's rice crop to decrease by 20 percent this year. The canals that connect the city to the coast allow storm surges to travel inland, bringing salt water that damages the land. An example of such a canal is the Mississippi River Gulf Outlet, which was built in the mid-1960s to be a 76-mile (122-kilometer) shortcut between the Gulf of Mexico and New Orleans. Before the record hurricane season of 2005, salt water brought inland by the canal was fingered as the culprit in the death of thousands of acres of cypress swamp, a natural buffer against storms. When Katrina hit, levee failures on the canal allowed water to pour into St. Bernard Parish and New Orleans East.
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