EGU21-10282, updated on 04 Mar 2021
https://doi.org/10.5194/egusphere-egu21-10282
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Morphometric analysis of the terrain over time to characterize subsidence. Case study: Mexico City, Mexico.

Gabriela Vidal1, Jacob Nieto Butrón1, Mario Alberto Hernández Hernández1, Graciela Herrera Zamarrón1, Enrique Cabral Cano2, Fabiola Doracely Yépez Rincón3, and Nelly Lucero Ramírez Serrato1
Gabriela Vidal et al.
  • 1National Autonomous University of Mexico, Institute of Geophysics, Mexico City, Mexico (gabrielavidalgarcia5@gmail.com)
  • 2National Autonomous University of Mexico, institute of Physics, Mexico City, Mexico
  • 3National Autonomous University of Nuevo León, Civil Engineering Institute, Nuevo León, México

It is well known that groundwater overexploitation can generate land subsidence due to the compaction of compressible aquitards. Mexico City's soils are an important example of highly compressible lake sediments in compaction due to groundwater extraction that have significantly damaged the urban and commercial building structures. Previous studies indicate that there is annual subsidence of 15 to 25 cm in the Mexico City International Airport, 10 cm in downtown, and between 10 to 15 cm in the Southeast Mexico City area. Soil fracturing is an indicator of differential subsidence that has damaged buildings and infrastructure, including hydraulic pipes, sidewalks, and pavements. For this reason, it is necessary to carry out specific studies related to topographic deformation. This talk presents a characterization of the terrain changes over time and a zoning map for Mexico City subsidence susceptibility. To this end, free access elevation models generated from 2000 to 2018 by different sensors and methodologies were compared. The resulting model is validated by mapping information from active GPS stations, whose data is also freely available. Besides, a spatial comparison of land subsidence areas and sites previously identified as flooding and aquifer overexploitation areas is presented. The results will serve as a basis for future monitoring to be carried out in the area with high-resolution tools.

How to cite: Vidal, G., Nieto Butrón, J., Hernández Hernández, M. A., Herrera Zamarrón, G., Cabral Cano, E., Yépez Rincón, F. D., and Ramírez Serrato, N. L.: Morphometric analysis of the terrain over time to characterize subsidence. Case study: Mexico City, Mexico., EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-10282, https://doi.org/10.5194/egusphere-egu21-10282, 2021.

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