Detecting differential ground displacements of civil structures in fast-subsiding metropolises with interferometric SAR and band-pass filtering
Por:
Solano-Rojas, Dario, Wdowinski, Shimon, Cabral-Cano, Enrique, Osmanoglu, Batuhan
Publicada:
1 ene 2020
Categoría:
Multidisciplinary
Resumen:
Ground displacements due to changes in soil conditions represent a threat to the stability of civil structures in many urban areas, worldwide. In fast-subsiding areas, regional subsidence (wavelength ~ 1,000’s m) can be dominantly high and, consequently, mask other signals at local scales (wavelength ~ 10–100’s m). Still, engineering and construction applications require a comprehensive knowledge of local-scale signals, which can threaten the stability of buildings and infrastructure. Here we present a new technique based on band-pass filters for uncovering local-scale signals hidden by regional subsidence as detected by interferometric SAR measurements. We apply our technique to a velocity field calculated from 21 high-resolution COSMO-SkyMed scenes acquired over Mexico City and obtain components of long (> 478 m), intermediate (42–478 m) and short (< 42 m) spatial wavelengths. Our results reveal that long-wavelength velocities exceed - 400 mm/year, whereas intermediate- and short-wavelength velocities are in the order of ± 15 mm/year. We show that intermediate-wavelength velocities are useful for retrieving signals such as uplift along elevated viaducts of Metro lines 4 and B, as well as differential displacements in Pantitlán station’s pedestrian overpass system and across sharp geotechnical boundaries in the piedmont of Sierra de Santa Catarina—where surface faulting occurs. © 2020, The Author(s).
Filiaciones:
Solano-Rojas, Dario:
Marine Geology and Geophysics, School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149-1098, United States
Department of Earth and Environment, Institute of Environment, Florida International University, Miami, FL 33199, United States
División de Ingeniería en Ciencias de la Tierra, Facultad de Ingeniería, Universidad Nacional Autónoma de México, CDMX, 04510, Mexico
Univ Miami, Marine Geol & Geophys, Sch Marine & Atmospher Sci, 4600 Rickenbacker Causeway, Miami, FL 33149 USA
Florida Int Univ, Dept Earth & Environm, Inst Environm, Miami, FL 33199 USA
Univ Nacl Autonoma Mexico, Div Ingn Ciencias Tierra, Fac Ingn, Cdmx 04510, Mexico
Wdowinski, Shimon:
Department of Earth and Environment, Institute of Environment, Florida International University, Miami, FL 33199, United States
Florida Int Univ, Dept Earth & Environm, Inst Environm, Miami, FL 33199 USA
Cabral-Cano, Enrique:
Departamento de Geomagnetismo y Exploración, Instituto de Geofísica, Universidad Nacional Autónoma de México, CDMX, 04510, Mexico
Univ Nacl Autonoma Mexico, Dept Geomagnetismo & Explorac, Inst Geofis, Cdmx 04510, Mexico
Osmanoglu, Batuhan:
NASA Goddard Space Flight Center, Greenbelt, MD 20771, United States
NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
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