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2010 Guatemala City sinkhole
The 2010 Guatemala City sinkhole was a disaster in which an area approximately across and deep collapsed in Guatemala City's Zona 2, swallowing a three-story factory.〔〔〔 The sinkhole occurred for a combination of reasons, including Tropical Storm Agatha, the Pacaya Volcano eruption, and leakage from sewer pipes.
==Background==
Overall, the risk of sinkholes occurring in Guatemala City is high and unpredictable. One recent, similar sinkhole had collapsed in 2007, forming a pit 100 metres deep.〔Waltham, T., 2008, (''Sinkhole hazard case histories in karst terrains.'' ) Quarterly Journal of Engineering Geology and Hydrogeology. vol. 41 no. 3, pp.. 291-300.〕〔Halliday, W. R., 2007, ''Pseudokarst in the 21st century.'' Journal of Cave and Karst Studies. vol. 69, no. 1, p. 103–113.〕 The 2007 Guatemala City sinkhole was formed by fluid from a sewer eroding uncemented volcanic ash, limestone, and other pyroclastic deposits underlying Guatemala City.〔〔 The hazards around the pipe have since then been mitigated, by improved handling of the city's wastewater and runoff. Several rainstorms also contributed to the sinkhole's collapse, as stormwater percolated into the ground, further dissolving the rocks beneath Guatemala City. The 2010 sinkhole was formed for similar reasons.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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