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Posted by Ulysses on January 8, 2009, 7:23 pm
 


That might explain part of why half of it fell down when they had a big
earthquake.

Do you have any links describing these bails of hay under Mexico City?  Why
are they there?  To soak up dampness or something because the city is built
on a dry lake bed?




Posted by GeekBoy on January 9, 2009, 12:39 am
 


The city was originally called Tenochtitlán. It was built on top of Lake
Texcoco


"The Aztecs saw this vision on what was then a small swampy island in Lake
Texcoco, a vision that is now immortalized in is Mexico's coat of arms and
on the Mexican flag. Not deterred by the unfavourable terrain, they set
about building their city, using the chinampa system (misnamed as "floating
gardens") for agriculture and to dry and expand the island."

http://en.wikipedia.org/wiki/Tenochtitlan


"Chinampa is a term describing a method of ancient Mesoamerican agriculture
which used small, rectangle-shaped areas of fertile arable land to grow
crops on the shallow lake beds in the Valley of Mexico.

Often referred to as "floating gardens," chinampas were stationary
artificial islands that usually measured roughly 30 by 2˝ meters, although
they were sometimes longer. They were created by staking out the shallow
lake bed and then fencing in the rectangle with wattle. The fenced-off area
was then layered with mud, lake sediment, and decaying vegetation,
eventually bringing it above the level of the lake. Often trees such as
willows were planted at the corners to secure the chinampa. Chinampas were
separated by channels wide enough for a canoe to pass."

http://en.wikipedia.org/wiki/Chinampa



Posted by William Wixon on January 9, 2009, 3:51 am
 

interesting.
reminds me of this (but on a larger scale) :)

http://en.wikipedia.org/wiki/Kingston_Fossil_Plant_coal_fly_ash_slurry_spill

(watch the video, then go to http://maps.live.com/   where you can see a
"bird's eye view" of the what the mountain of ash looked like before the
corner of it slid off.)

Live Search Maps
http://maps.live.com/default.aspx?v=2&FORM=LMLTSN&cp5.912133~-84.512329&style=h&lvl &tilt=-90&dir=0&alt=-1000&scene&187244&phx=0&phy=0&phscl=1&encType=1

click on "bird's eye"

b.w.

(it appears to me that's basically how they built this mountain of fly ash,
they "fence in" an area using bulldozers and fly ash and then pump in fly
ash slurry and let it dry, then repeat the process over and over again till
they built a 50 foot high 40 acre mountain of ash.  i wonder how far below
grade they started.) amazing.




Posted by GeekBoy on January 9, 2009, 5:53 am
 

And something similar is happening in Mexico City:

"Mexico City - Mexico City is sinking by the day.

Whole buildings have descended 10 metres from a century ago, in large part
due to the excessive extraction of water to supply some 20 million
inhabitants of the city's metropolitan area.

The crisis has led Mexican authorities to draw up an ambitious investment
plan of 3.3 billion dollars plus by 2012, with the cooperation of the
private sector.

Among other infrastructures, six water treatment plants are to be built, and
deep drainage is to be improved to avoid sewage floods like the one that
took place in 2000 in Chalco, a metropolitan municipality. "

http://www.monstersandcritics.com/science/features/article_1393850.php/Mexico_City_sinking_by_the_day



http://maps.live.com/default.aspx?v=2&FORM=LMLTSN&cp5.912133~-84.512329&style=h&lvl &tilt=-90&dir=0&alt=-1000&scene&187244&phx=0&phy=0&phscl=1&encType=1


Posted by harry on January 9, 2009, 8:46 pm
 
If you go to Lake Titicaca in Peru the locals still use this system.
(Using reeds) You can stay there as a tourist.   I stayed there myself
years ago.  Got to watch out you don't fall through the "floor" as the
water is damned cold the lake is high up so it's cold at night.
Houses, boats, sails, everything is made out of reeds.

http://gosouthamerica.about.com/od/topdestlaketiticaca/a/floatingislands.ht=
m

Re bales, Who the F*** would want to buy one if you wanted to move?
Also the rats and mice soon move in. If it gets damp, toxic fungus
spores can be released into the building.   (Causes a disease known as
"farmers lung"over here.)
http://www.cdc.gov/nasd/docs/d001501-d001600/d001538/d001538.html
Can kill you!




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