Week 13: Post your Blog Entries as Comments to my Main Post Each Week Post by Sunday at midnight.
Post by Sunday at midnight.
Even though we lack a meeting on Wednesday June 2 (due to national elections as a holiday), remember to post something to the blog. See you next week, June 9th.
1. lee, Sung-Hee 2. Guatemala Sinkhole Not a Sinkhole 3. The sinkhole appeared in downtown Guatemala City. It caused by not nature but human. The sinkhole's cause was predicted that the city's sewer system was weak and didn't manage. Human make risk society to threaten human. Human need to care for both God's creature and human's creature. ----------------------- Human activity, not nature, was the likely cause of the gaping sinkhole that opened up in the streets of Guatemala City on Sunday, a geologist says. A burst sewer pipe or storm drain probably hollowed out the underground cavity that allowed the chasm to form, according to Sam Bonis, a geologist at Dartmouth College in New Hampshire, who is currently living in Guatemala City (map). The Guatemala City sinkhole, estimated to be 60 feet (18 meters) wide and 300 feet (100 meters) deep, appears to have been triggered by the deluge from tropical storm Agatha. But the cavity formed in the first place because the city—and its underground infrastructure—were built in a region where the first few hundred meters of ground are mostly made up of a material called pumice fill, deposited during past volcanic eruptions. "Lots of times, volcanic pumice originates as a flow [of loose, gravel-like particles], and because of the heat and the weight, it becomes welded into solid rock," Bonis said. "In Guatemala City [the pumice is] unconsolidated, it's loose," he said. "It hasn't been hardened into a rock yet, so it's easily eroded, especially by swift running water." In general, the zoning regulations and building codes in Guatemala City are poor, Bonis said, and the few regulations that exist are often ignored. That means leaking pipes could have gone unfixed long enough to create the right conditions for the sinkhole. (Related pictures: "How Humans Can Trigger Earthquakes.") .... -------- http://news.nationalgeographic.com/news/2010/06/100603-science-guatemala-sinkhole-2010-humans-caused/
A very down to earth* kind of guy. I'm an environmental sociologist interested in establishing material and organizational sustainability worldwide. I'm always looking for interesting materials/technologies, inspiring ideas, or institutional examples of sustainability to inspire others to recognize their choices now. To be fatalistic about an unsustainable world is a sign of a captive mind, given all our options.
*(If "earth" is defined in a planetary sense, concerning comparative historical knowledge and interest in the past 10,000 years or so anywhere...) See both blogs.
1. lee, Sung-Hee
ReplyDelete2. Guatemala Sinkhole Not a Sinkhole
3. The sinkhole appeared in downtown Guatemala City. It caused by not nature but human. The sinkhole's cause was predicted that the city's sewer system was weak and didn't manage. Human make risk society to threaten human. Human need to care for both God's creature and human's creature.
-----------------------
Human activity, not nature, was the likely cause of the gaping sinkhole that opened up in the streets of Guatemala City on Sunday, a geologist says.
A burst sewer pipe or storm drain probably hollowed out the underground cavity that allowed the chasm to form, according to Sam Bonis, a geologist at Dartmouth College in New Hampshire, who is currently living in Guatemala City (map).
The Guatemala City sinkhole, estimated to be 60 feet (18 meters) wide and 300 feet (100 meters) deep, appears to have been triggered by the deluge from tropical storm Agatha.
But the cavity formed in the first place because the city—and its underground infrastructure—were built in a region where the first few hundred meters of ground are mostly made up of a material called pumice fill, deposited during past volcanic eruptions.
"Lots of times, volcanic pumice originates as a flow [of loose, gravel-like particles], and because of the heat and the weight, it becomes welded into solid rock," Bonis said.
"In Guatemala City [the pumice is] unconsolidated, it's loose," he said. "It hasn't been hardened into a rock yet, so it's easily eroded, especially by swift running water."
In general, the zoning regulations and building codes in Guatemala City are poor, Bonis said, and the few regulations that exist are often ignored. That means leaking pipes could have gone unfixed long enough to create the right conditions for the sinkhole. (Related pictures: "How Humans Can Trigger Earthquakes.")
....
--------
http://news.nationalgeographic.com/news/2010/06/100603-science-guatemala-sinkhole-2010-humans-caused/