We analyse urban subsidence and generating causes for three case studies, Mexico City, Rome, Ciudad Guzman, by means of well consolidated multi-temporal and multi-frequency InSAR techniques. Envisat, RadarSat-2, Cosmo-SkyMed, Sentinel-1 data have been processed in order to investigate long term surface displacements due to natural and anthropogenic casues. In particular, in Rome city we focused on soil compaction due to urban settlements and secondary effects over manufactures and buildings. In Ciudad Guzman we retrieved the long-term evolution (2003-2018) of a creeping phenomenon producing ground fissuring. Together with data from in situ surveys, we identified the causes related to the exploitation of the aquifers and controlled by the distribution and position of buried faults. In Mexico City we tested a novel empirical procedure to evaluate the effect of the ground subsidence on the spatial and temporal seismic response of soils. The information provided by satellites is combined with a-priori geological/geotechnical information to assess the soil compaction and the shortening of the soil vibration periods. We applied the procedure to estimate the shortening of the soil resonant period of Mexico City between 2005 and 2013. The results of long-term trend observed by satellites are here presented in the Web-GIS IRiDIuM (InsaR DeformatIon web Mapping).
Urban subsidence analysed by Multitemporal-Multifrequency InSAR techniques:hints from three case studies.
Saroli M.Conceptualization
;
2019-01-01
Abstract
We analyse urban subsidence and generating causes for three case studies, Mexico City, Rome, Ciudad Guzman, by means of well consolidated multi-temporal and multi-frequency InSAR techniques. Envisat, RadarSat-2, Cosmo-SkyMed, Sentinel-1 data have been processed in order to investigate long term surface displacements due to natural and anthropogenic casues. In particular, in Rome city we focused on soil compaction due to urban settlements and secondary effects over manufactures and buildings. In Ciudad Guzman we retrieved the long-term evolution (2003-2018) of a creeping phenomenon producing ground fissuring. Together with data from in situ surveys, we identified the causes related to the exploitation of the aquifers and controlled by the distribution and position of buried faults. In Mexico City we tested a novel empirical procedure to evaluate the effect of the ground subsidence on the spatial and temporal seismic response of soils. The information provided by satellites is combined with a-priori geological/geotechnical information to assess the soil compaction and the shortening of the soil vibration periods. We applied the procedure to estimate the shortening of the soil resonant period of Mexico City between 2005 and 2013. The results of long-term trend observed by satellites are here presented in the Web-GIS IRiDIuM (InsaR DeformatIon web Mapping).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
