Makes points I haven't seen anywhere else:
http://www.stratfor.com/news/archive/050903-geopolitics_katrina.php<snip>
A simple way to think about the New Orleans port complex is that it is where the bulk commodities of agriculture go out to the world and the bulk commodities of industrialism come in. The commodity chain of the global food industry starts here, as does that of American industrialism. If these facilities are gone, more than the price of goods shifts: The very physical structure of the global economy would have to be reshaped. Consider the impact to the U.S. auto industry if steel doesn't come up the river, or the effect on global food supplies if U.S. corn and soybeans don't get to the markets.
The problem is that there are no good shipping alternatives. River transport is cheap, and most of the commodities we are discussing have low value-to-weight ratios. The U.S. transport system was built on the assumption that these commodities would travel to and from New Orleans by barge, where they would be loaded on ships or offloaded. Apart from port capacity elsewhere in the United States, there aren't enough trucks or rail cars to handle the long-distance hauling of these enormous quantities -- assuming for the moment that the economics could be managed, which they can't be.
The focus in the media has been on the oil industry in Louisiana and Mississippi. This is not a trivial question, but in a certain sense, it is dwarfed by the shipping issue. First, Louisiana is the source of about 15 percent of U.S.-produced petroleum, much of it from the Gulf. The local refineries are critical to American infrastructure. Were all of these facilities to be lost, the effect on the price of oil worldwide would be extraordinarily painful. If the river itself became unnavigable or if the ports are no longer functioning, however, the impact to the wider economy would be significantly more severe. In a sense, there is more flexibility in oil than in the physical transport of these other commodities.
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The oil fields, pipelines and ports required a skilled workforce in order to operate. That workforce requires homes. They require stores to buy food and other supplies. Hospitals and doctors. Schools for their children. In other words, in order to operate the facilities critical to the United States, you need a workforce to do it -- and that workforce is gone. Unlike in other disasters, that workforce cannot return to the region because they have no place to live. New Orleans is gone, and the metropolitan area surrounding New Orleans is either gone or so badly damaged that it will not be inhabitable for a long time.
more....