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Saturday, September 03, 2005

The unforgiving mathematics of evacuations 
Yet another shameless plagiarization, this time from one of Jeff Jarvis's readers.




I can’t BELIEVE you people.

Disgusting. Really disgusting.

You have NO CLUE what rescue efforts entail, what it takes to shift people and material over 100s of miles of randomly destroyed terrain in any sort of organized fashion, you’ve got no idea AT ALL what it takes to feed and house the people DOING the relief work, much less what it takes to actually get the job done.

One of the pissant little socialists here said:

“”"
And yes, BOB, Americans pay taxes so that this kind of situation never happens.
“”"
Really, tax dollars prevent hurricanes?

Oh, you mean you’re willing to spend upwards of a billion dollars a year nationally (in FY2000 FEMA requested 300 billion for disaster releif, this is one agency, and doesn’t include Coast Guard or National Guard budgets etc.) to keep men and material prepared for the kinds of disasters that happen once every decade or two?

Like hell you are. You’d be one of the first to whine about how that money could go to…well, let’s not get any nastier.

“”"
I cannot believe this is our country. The government should have been mobilized and ready to go on MONDAY!
“”"

They were. Bush made the “Disaster Area” declaration before the storm hit land.

Do some math would you PLEASE? I realize it’s “linear thinking”, and “hard”, but just stop and figure:

Let n be the number of buses needed to to shift people from one place to the other.
Let x be the number of miles you need to shift these people to get them to “saftey”.
Let y be the number of people you can shift per bus.
Let p be the total population you’ve got to move.
Let h be the time you’ve got to move them in.

The simple calculation is:
n=p/y

How many people on a bus? Well, let’s assume a big bus, I think that’s around 70 people, and we’re going to move them 300 miles from the coast (the effected area reaches inland /at least/ 120 miles, my daughter lives in Central MS, and as of 3 this afternoon they were w/out power and she was heading to Atlanta to be with her mom)

How many people have we got to move? 2000:

29=2000/70 (this is integer math, we get whole buses so we round up).

10000 people:
143 buses.

100,000 people:
1429 busses.

Now, 1429 buses is a lot. And that’s also 1429 drivers that have to be gotten somewhere on time etc. Where are you going to get that many? You won’t. You can’t. The buses in the damaged areas cannot be planned on, nor can the drivers (they have families etc.). So you do with fewer buses but make multiple trips, this gets even worse, because now you add time into it, and it becomes about how long it takes to shift people, and how many you can shift per trip or hour.

All this takes planning. And shifting resources around (buses have to be fueled people have to be fed and watered etc.).

And 100,000 is only 1/10th-1/12th of hte people in that area. In addition to just shifting these people you’ve got medical problems, rescue problems etc.

And you /cannot/ pre-plan and pre-stage because you don’t know where the damage will happen, so you can’t count on any particular route being open, and you can’t count on any particular *close* spot being safe, and if you’re too far away you’re running low on fuel inside the damage zone and and and and.

70 per bus, 300 miles each way. 60 miles per hour. That’s 70 people per bus in per 10 hours. Or 7 people per hour per bus.

You’ve got 100,000 people to shift, which means (basically) 14286 bus hours, so 10 buses finishes the job in 1428 hours, 100 finishes in 142 hours (actually add 5 to that for 1 one way trip). To get 100,000 people shifted in 48 hours you’re going to need roughly 298 buses. Which is also 298 drivers. This is all, of course, assuming that things go smoothly. You could probably gather up 3oo school buses from the states around the affected areas and get them in, but school buses are smaller (IIRC about 40 adults) than what I was talking about. WHich means almost (fudging because of the hour) twice as many buses and drivers.

Right after a hurricane. And we haven’t even begun to talk about how many buses go to where and at what time. Or about how to handle medical problems on the bus, feed the people etc. Hell, even refueling the buses.

And note, we’re just talking about getting 100,000 people out of New Orleans and the surrounding area.

And we didn’t /know/ it was going to be New Orleans until Saturday/Sunday.

And on Tuesday morning (before the levee gave way) it looked like things were going to be, well, not ok, but not worse-case. So the planners started shifting resources and planning to the areas that were obviously going to need it.

Then the damn broke.

There are good reasons why there are NO large scale evacuation plans for any metropolitan are in this country. You simply CANNOT plan that sort of thing. Really, Really bright people have tried, and they keep realizing it DOES NOT WORK.

Reality is NOT ameniable to our desires /just/ because we wish it. Maybe someday we’ll be able to predict this stuff 2-3 weeks out with reasonable accuracy, and get people out of the way in time. Now we cannot, so we have to clean up afterwards.

The government is moving just as fast (or faster) on this disaster as they have in all the others, it’s just that now information flows even faster, and we’re all–left, center and right–hurting for these people.

(Asside: why did people stay in the path of a Cat 4/5 hurricane? Because the leftist school system, coupled with the Christian foot stomping over science has left people without a basic understanding of weather, physics and math? Well, partly. Because there is still a perception of Meterologists being completely WRONG? Well, partly. Because of 2 decades of media/newspapers predicting TEOTWAWKI and it turns out to be not that big a deal? Partly. Because many were too poor to leave? Sure. Teach people math and physics and they’ll move when they realize how much energy is coming straight at them).

But you’re not interested in that, because that makes Bush (in this case) just someone reacting to events outside ANYONEs control, and that means you can’t whine more about him.

And quite frankly that petty, lame, and rather small.




Yep.

Comments:
I took the other approach to the same issue. I looked at the problems of moving just one bus.

Dave

http://www.angryot.blogspot.com/
 
What gets me is that even if the govt. had provided buses before the hurricane, how many of the people there now would have actually gotten on them????? Is it not the responsibility of state and local govt. to provide initial assistance, then asking for federal help................
 
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Here's 600+ of the buses needed...Mayor Nagin seemed to have forgotten to use them (or at least move them to higher ground).

Check this link:
http://news.yahoo.com/news?tmpl=story&u=/050901/480/flpc21109012015

Meanwhile Mayor Nagin, the govenor of Louisana, the DNC, MSM, et al are still yapping that it's George Bush's fault that the town wasn't evacuated...seems to me those buses could have evac'd 24,000 per lap (40 x 600).
 
I'm puzzled here, because the discussion of difficulty is about using buses after the hurricane, whereas the evacuation plan that the state and locals didn't implement was about using buses before the hurricane. It seems to me that this could have been perfectly practical (and as this post says, it could have involved other states, though I doubt it would have needed to.) I posted about it at
Mistakes by TJM; I really don't see what's not obvious about it. But then, I'm not only not a logistics expert, I've never driven a bus or truck in my life.
 
Any disaster plan has evacuation plans for before and after the disaster.

The plan for after, takes into account that most roads. bridges, tunnels, railways will not be usable.

But as was said, if you don't actually DO what the plan says..well what is the use in having one at all?

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