Abstract
Constantine city, Algeria, and its surroundings have always been affected by natural and human-induced slope instability and subsidence. Neogene clay-conglomeratic formations, which form the largest part of Constantine city, are extremely sensitive to the presence of water, which makes them susceptible to landslides. Fast and accurate identification and monitoring of the main areas facing existing or potential hazardous risks at a regional scale, as well as measuring the amount of displacement is essential for the conservation and sustainable development of Constantine. In the last three decades, the application of radar interferometry techniques for the measurement of millimeter-level terrain motions has become one of the most powerful tools for ground deformation monitoring due to its large coverage and low costs. Persistent scatterer interferometry (PS-InSAR) has a demonstrated potential for monitoring a range of hazard event scenarios and tracking their spatiotemporal evolution. We demonstrate the efficiency of Sentinel-1 data for deformation monitoring in Constantine located in the northeast of Algeria, and how an array of information such as geological maps and ground-measurements are integrated for deformation mapping. We conclude this article with a discussion of the potential of advanced differential radar interferometry approaches and their applicability for structural and ground deformation monitoring, including the advantages and challenges of these approaches in the north of Algeria.
Highlights
With the development of differential Synthetic Aperture Radar interferometry (D-InSAR) and persistent scatterer interferometry (PS-InSAR), wide area monitoring of ground motion from space became a reality
11, shows motion, which was not in the near future. As it is shown in the geologic map of Constantine, we found the superposition of geologic
The application of permanent scatterers (PS)-InSAR over Constantine revealed a number of previously known sites formation called “néritique constantinois” attributed to the Early Jurassic and Cretaceous ages, showing deformation and ground motion (e.g., Boussouf and Saint Jean), where the comparison of previous studies and field surveys with our results demonstrates a good overlap
Summary
With the development of differential Synthetic Aperture Radar interferometry (D-InSAR) and persistent scatterer interferometry (PS-InSAR), wide area monitoring of ground motion from space became a reality. D-InSAR is used for monitoring ground motion and measuring displacement at millimeter accuracy and large surface coverage. D-InSAR has been successfully used over the last three decades to generate high spatial density displacement maps in centimeter/millimeter accuracy across wide areas; the interferogram quality is largely affected by temporal decorrelation and atmospheric disturbances. To reduce these limitations reliable deformation measurements can be obtained in a multi-image framework analyzing the spatio-temporal development of permanent scatterers (PS) [3]. Applications include studies of displacements from seismic events [4,5], subsidence [6,7,8], uplift, swelling, and buckling around fault streams [9]
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call