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Long-term ground deformation patterns of Bucharest using multi-temporal InSAR and multivariate dynamic analyses: a
Iuliana Armaş1, Diana A Mendes2, Răzvan-Gabriel Popa3
1University of Bucharest, Faculty of Geography, Department of Geomorphology-Pedology-Geomatics, Nicolae Balcescu 1, Sector 1, 010041, Bucharest, Romania.
This study reveals long-term ground displacement patterns in Bucharest using satellite radar data and interferometry. These patterns, showing long-term memory, may indicate tectonic stress fields from transpressional movements.
Area of Science:
- Geosciences
- Remote Sensing
- Geophysics
Background:
- Urban areas experience ground displacement due to various factors.
- Understanding spatial evolution patterns is crucial for urban planning and hazard assessment.
- Satellite remote sensing offers advanced capabilities for monitoring ground deformation.
Purpose of the Study:
- To analyze spatial evolution patterns in the Bucharest metropolitan area.
- To map line-of-sight displacements using satellite data and interferometry.
- To investigate ground displacement trends over former industrial and landfill sites.
Main Methods:
- Utilized single polarized Synthetic Aperture Radar (SAR) satellite data (ERS-1/-2, ENVISAT, TerraSAR-X).
- Applied Small Baseline Subset (SBAS) and Persistent Scatterers (PS) multi-temporal Interferometry (InSAR) techniques.
- Integrated remote sensing results with diachronic cartography and field research.
Main Results:
- Generated maps of line-of-sight displacements for the Bucharest metropolitan area.
- Identified ground displacement trends over former clay pits, landfills, and industrial parks.
- Analyzed displacement trends using linear and nonlinear models, revealing long-term memory characteristics.
Conclusions:
- Ground displacement trends exhibit long-term memory, indicated by low noise Hurst exponents.
- Observed long-term attractors in displacement patterns suggest potential tectonic stress fields.
- Hypothesize these attractors are generated by transpressional tectonic movements.
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