It may be weeks before we know the full extent of the catastrophe that Katrina has unleashed upon the Gulf Coast, but it’s not too soon to start thinking about the implictions for Virginia. None of our cities, thankfully, are situated below sea level, but large chunks of Hampton Roads sit only a few feet above the water line. We need to start asking, just how vulnerable is this metropolitan area, home to one fifth of the state’s population, to a hurricane of Katrina proportions? And what should we do about it?
An excellent starting point for thinking about these questions is an October 2001 article in Scientific American, Drowning New Orleans, which prophesied the New Orleans tragedy with horrifying clarity. Over the past century, the building of dikes, levies and channels to protect the city disrupted the flow of Mississippi River sediment that replenished the bayou, resulting in the widespread erosion of wetlands and barrier islands. As a consequence, New Orleans lost its natural barriers to the 20-foot storm surge. (Kudos to blogger “Subpatre” for bringing this to my attention.)
Thanks to the efforts of the Nature Conservancy, our Eastern Shore coastline remains largely intact. But development has been extensive along the Virginia Beach coastline. I can’t imagine that Virginia Beach is anywhere near as vulnerable as New Orleans — but could it be as vulnerable as Biloxi? How are our natural buffers faring? What impact are the sand replenishment programs having?
The other question we must ask: If a Force 5 hurricane bore down on Hampton Roads, could the million inhabitants of Virginia Beach/Norfolk/Cheseapeake/Portsmouth be evacuated? The scenes of gridlock on the Interstates leading out of New Orleans are not reassuring. Hampton Roads leaders have been pushing for a “third crossing” to the Peninsula, citing hurricane evacuation as one of the justifications. I have long opposed tax increases for the purpose of congestion mitigation in the region because I think there are so many other less expensive alternatives to building more roads. But I can’t think of any other way to evacuate one million people from Hampton Roads. In light of the New Orleans tragedy, the third crossing is looking more and more like a necessary investment.

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