The city of New Orleans is in the delta of a great river. During hurricane Katrina most of the city flooded but the area along the river, like the French Quarter, did not. Why didn't these areas flood?
◦ The water couldn't flow fast enough to cover these areas and was halted before it could flood these areas.
◦ These areas were natural levees of the river, and were higher in elevation than adjacent areas.
◦ The river flowed away from these areas into other parts of the city when it broke the levees, and these areas just happened to be spared.
◦ The army corps of engineers must have dredged the river and built these areas up before the city was built.
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