Abstract:
Communication and transportation networks are among the most important infrastructures critically involved in the development of different countries. The structural and tectonic position of Iran causes significant damage to its communication networks every year. Therefore, it is essential to adopt an integrated and flexible approach for assessing seismic risk in terms of available indicators. The differential synthetic aperture radar interferometry (DInSAR) technique is among the most effective and suitable techniques for monitoring land surface change. Therefore, this research aimed to estimate the displacement rate caused by the activity of fault lines over the railway tunnels in Hormozgan. The results revealed that the displacement rate was higher in parts with a higher fault density and intersection. Specifically, the amount of displacement due to tectonic activity in the studied area was estimated between 1.2 and 2.7 cm per year. Accordingly, the railway tunnels of Hormozgan are at risk of destruction over time.
Machine summary:
The differential synthetic aperture radar interferometry (DInSAR) technique is among the most effective and suitable techniques for monitoring land surface change.
The differential synthetic aperture radar interferometry (DInSAR) technique is able to monitor railway tracks and embankments with millimeter-level precision over wide areas (Chang et al.
(2015) assessed the active tectonics at the boundary of the Kashi Depression, China, based on time series DInSAR observations; according to their results, the DInSAR rate map indicated that the northern part of South Atushi fault had ~3 mm/year uplift compared to that of the southern part, suggesting that the main tectonic deformation potentially occurs along the South Atushi fault.
Figure 3 displays different processing steps to pass interferometric DInSAR for advanced synthetic aperture radar (ASAR) for monitoring and calculating displacement tectonic.
Figure 7 shows the differential interferometry resulted from subtracting reference topography phase and superimposed interferogram related to the image couples with high coherency from the seismicity area with higher magnitude and in separate windows.
Accordingly, tectonic displacement by ASAR image processing using DInSAR technique at different time intervals for some couples of radar images related to 2003 through 2010 are displayed in the form of mapping the faults for displacement map (Figure 8).
The results showed that radar image, DInSAR for identifying active tectonic areas as well as calculating the tectonic displacement have good potentials.
Nationwide Railway Monitoring Using Satellite SAR Interferometry, IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING, DOI: 10.