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than predicted. The fence is impractical, and, simply put, one of the dumbest ideas to come out of ANYONE'S mind in the past half century. A simple fence, chain linked or otherwise, could be defeated with a 25 dollar pair of wire cutters. In addition to this, you would have to build guard towers behind the fence, at least 20 feet high, assuming the fence is about 8 feet high. Each tower must be no more than about 300 to about 800 meters from each other, to be within both line of sight and weapons range, to create overlapping arcs. This means, on 1,952 mile(3,141km) stretch, you would have about 10 THOUSAND towers, now, imagine just 3 folks per tower, the absolute lowest amount, one person per 8 hour shift, that's 30,000 tower guards. This doesn't even include free range border guards, maintenance workers, etc.
Let's say you decide to go high tech, instead of using guard towers, or border guards at all. First, you would need to detect border crossers, this can be accomplished though seismometers, to "hear" footsteps, however, can be prone to error, due to animal activity. Other methods include using infrared sensors, but, same problem, especially with larger animals. Not to mention the amount of money needed to buy this equipment and then maintain it.
The next step is deterrent, to provide obstacles so border crossers can't pass the barrier, I use barrier, because to be honest, a fence, even with razorwire on top, can be defeated with, as I said, wire cutters, or, if somewhat desperate, a heavy jacket thrown over the razorwire as you climb over. Now, an obvious solution would be to electrify the fence, this, I believe, is dumb. You would have to divide the fence up into discrete circuits, sections that are electrified, not to mention providing the juice, 24/7. These sections can be easily shorted out when a wayward animal, or, more likely, several of them, end up running into the fence, this will create problems till the animals learn to avoid it.
A more practical idea is to go the Berlin Wall route, where you have several thousand guards, all given orders to shoot to kill EVERYONE attempting to cross the border. Make a doubled up, concrete, wall, with razor wire up top, and land mines littering the empty section between the walls. Best to put a ditch in front of the wall, to prevent certain heavy vehicles from crashing through.
Such a wall, if built, would pretty much dwarf all major human projects in human history, except the Great Wall, at least, and that wall didn't slow down the Mongols, did it? Hell, it didn't do anything, not really, border towns in China traded and crossed the borders with their Mongol neighbors for centuries after the walls were combined into one and vice versa. Not to mention cost, if the Iraq war doesn't bankrupt us, THIS would. Even the United States doesn't have the money or industrial capacity to build such a barrier.
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