"It is based on new satellite radar data taken from 2002 to 2005, which show that New Orleans sank by an average of 0.22 inches (0.5cm) a year during that period.
But the study says some low-lying areas are subsiding by more than one inch (2.54cm) a year - raising concerns about the city's future.
The scientists name overdevelopment, drainage and natural seismic shifts as the main causes.
'My concern is the very low-lying areas,' said lead author Tim Dixon, geophysicist at the University of Miami. "I think those areas are death traps. I don't think those areas should be rebuilt," he said.
Update: Here is an image from the New Scientist.
Notice the red spots on the levees along the MRGO.
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