Mass movement processes triggered by land subsidence in Iztapalapa, the eastern part of Mexico City
Por:
González-Hernández M., Carreón-Freyre D., Gutierrez-Calderon R., Cerca M., Flores-Garcia W.
Publicada:
1 ene 2015
Resumen:
Geological and structural conditions in the Basin of Mexico coupled with
natural and anthropogenic factors, such as groundwater exploitation,
provokes land subsidence and differential deformation. The study area is
located in to the north of Iztapalapa, a municipality within Mexico
City, in a site called ``El Eden'' with irregular topography. Where
volcanic sequences overlie the lacustrine deposits of clays and silts
and show displacements by the action of gravity. The displacement zone
was delimited at the top of the slope by the formation of circular
tensile fractures with stair -shaped geometries. At the base of the
slope, compressive processes damaged housing, sidewalks and inclined
light poles and trees. A NW-SE system of fractures was identified in
which displacement velocities vary from a few millimeters to several
centimeters per year. Which affects urban facilities. In this work a
conceptual model of deformation is presented that integrates the
geological and mechanical factors leading to landslide and land
subsidence. A geophysical survey leads to evidence of how land
subsidence processes increase the sliding slope.
Filiaciones:
González-Hernández M.:
Centro de Evaluación de Riesgos Geológicos CERG, Iztapalapa, Mexico City, Mexico
Carreón-Freyre D.:
Centro de Geociencias de la UNAM, Juriquilla, Querétaro, Mexico
Gutierrez-Calderon R.:
Centro de Evaluación de Riesgos Geológicos CERG, Iztapalapa, Mexico City, Mexico
Cerca M.:
Centro de Geociencias de la UNAM, Juriquilla, Querétaro, Mexico
Flores-Garcia W.:
Centro de Evaluación de Riesgos Geológicos CERG, Iztapalapa, Mexico City, Mexico
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