Structural Deformation Monitoring In Urban Area Using INSAR
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Date
2019-06
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Addis Ababa University
Abstract
In recent years, space-borne InSAR (interferometric synthetic aperture radar) techniques have
shown their capabilities to provide precise measurements of Earth surface displacements for
monitoring urban infrastructure. The methodology described in this paper aims at detecting ground
motions and structural deformations at the whole city and local scale, In this research, present two
test sites studies on how space geodetic tools, especially Radar Interferometry (InSAR), can be used
to monitor structural deformation. First, investigate the land subside and uplifting extent and
severity area of deformation in the city of Addis Ababa using InSAR. Short wavelength C-band
data are explored in this study. The integrated use of interferometric synthetic aperture radar
technology for monitoring structural deformation offers several perspectives for investigation of
new and aging infrastructure around the city. Spanning almost 12 years space born of observation,
and the interferograms produced from the raw ENVISAT and SENTENIEL data to perform
classical PS-INSAR analysis in corporate measurement those satellite data. and can be detect a long
term maximum land subsidence rate of about -36.78mm/yr measuring at PSINSAR , and minimum
3mm of uplifting are detected. The quantitative validation results of the InSAR-derived deformation
trend during the five observation periods are stable with the ADIS GPS station data measured from
2014 to 2018. Overall, the adopted methodology can be used successfully for detection, mapping
and monitoring of the subsiding areas vulnerable to future collapse. This will facilitate efficient
planning and designing of surface infrastructures and other developmental structures in the urban
areas and mitigation management of subsidence induced hazards.
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Keywords
INSAR, tructural Deformation, Urban Area, Deformation Monitoring