Showing posts with label landslide. Show all posts
Showing posts with label landslide. Show all posts

Friday, November 27, 2015

Stubbed Toe

See below; this is my reconstruction of the Santa Clarita landslide.


Typically large, slow-moving rotational slump- (meaning that the movement is rotational, with the top part moving down and in and the bottom (or toe) moving down and out) earthflows (meaning that the thing is moving slowly, like a big earth glacier) develop large toe-bulges at the bottom. Somewhere in my files I have a picture of an old mine access road that has been buckled up and rotated vertical by the toe pushing up and out at the bottom of a large earthflow; the thing stood straight up for about 8 or 10 feet. That'd have been a real sonofabitch to drive up with a stick shift.

I had a long discussion about this thing with my friend GeoChick, and I told her my problem was that all the articles had the scientific intelligence of a mophead. "Guh - landslide" was about the level of sophistication. Seriously; I couldn't tell either from the pictures or the text enough about the topography or the geology to even guess what was happening.

But long-time commentor Ael finally sent me a link to an article that showed not just the big honkin' road uplift but the surroundings, and it looks pretty clear to me that this thing is at or near the base of a slope that is failing, and it's pushing this road up because the road is at or near where the bottom of the slide plane "toes out" of the ground surface...

And this is a simple landslide. Given that, can you imagine how hard it is for most reporters to understand something as complex as climate change?

Monday, March 31, 2014

Deep Denial

You have probably at this point seen something about the immense landslide that buried portions of the small western Washington town of Oso.


I should say here that while I didn't know this specific locality or the geology of the particular hillside involved that the news didn't really surprise me. And that, frankly, it shouldn't have surprised anyone else, including the people in the little town that woke up last week to find themselves very much dead.

Tim Egan has a good summary of the geology and the politics behind the deaths here. I can't really do much better at describing why these people were buried than he does:
"...who wants to listen to warnings by pesky scientists, to pay heed to predictions by environmental nags, or allow an intrusive government to limit private property rights? That’s how these issues get cast. And that’s why reports like the ones done on the Stillaguamish get shelved. The people living near Oso say nobody ever informed them of the past predictions."
As Egan points out the "problem" is not the science. We knew what happened, why it happened, and why it was damn likely to happen. The geology is pretty straightforward; western Washington (and parts of western Oregon but the Puget glaciation makes things an order of magnitude or three worse in WA...) combines steep terrain, lots of water, and weak substrate into a deck full of pretty deadly cards.

Throw in clearcut logging and you have a real wildcard in the deck.

No. The "problem" was and is really the suite of massive problems surrounding the politics of this region and of a hell of a lot of the way we Americans think in general.

First, a whole lot of rural western WA is pretty much logging and nothing else. If you close, or limit, the logging in the steep timberlands around these little towns then little towns like this Oso just flat-out die anyway. Only without the, you know, actual dying.

And then there's the question of "private property rights". A hell of a lot of the sorts of people who live in this little town, including the ones now buried under a shit-ton of hardening landslide debris, believed that they had the absolute right, and that the timber companies had the absolute right, to do absolutely whatever they wanted to do on "their" lands. And that to do anything to change, or stop, those people and companies doing those things was wrong.

So that while a whole hell of a lot of people knew that this hillside was unstable, and that logging around it was problematic at best, and that the possibility for the whole goddamn thing to move downhill on top of these people's houses was not so much a question of "if" as "when"...nobody actually pushed someone to do anything about that.

In this case the nobodies and someones involved would have had to accept that 1) there are limits, and deadly sharp, critical, limits on our human ability to fuck about with natural systems, and 2) that it is in humans' best interests to have an overall authority - let's call it "government" because, really, what the hell - to define and enforce restrictions on that human activity before it crosses those limits.

And rural western WA and a hell of a lot of today's United States is full of people who accept neither 1) nor 2).

So this one falls under the general heading of, what's the quote, something like "The willingness of someone not to believe something is directly related to how critical it is to their perceived self-interest not to believe it."?

They saw their self-interest as "private property rights" and "limited government" and not "natural hazards" or "regulation".


In order to believe that they had to deny that this could happen.

And then one morning their denial rose up and buried them deep.