Hurricane Katrina's Aftermath

How New Orleans Flooded

The storm surge that overtopped levees protecting the Lower Ninth Ward was amplified by the Mississippi River Gulf Outlet, a little-used shipping channel constructed by the Corps of Engineers in the 1950s and 1960s, a new computer model shows. Central New Orleans flooded when levees along the 17th Street and London Avenue drainage canals failed. Three teams of engineering experts are investigating whether design errors or other flaws played a role.

How New Orleans Flooded

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