Abstract
Abstract. Landslides are geological phenomena that are spread on Bulgarian territory mainly along the northern Black Sea coast and on the right banks of the Danube in the western part of the country. Mitigation of the negative effects of these destructive geological phenomena is the compilation of inventory maps of their distribution and registers with the main characteristics of the individual landslides. Conventional methods for making such maps are time-consuming and resource-intensive. Modern satellite, air and ground-based remote sensing technologies facilitate the production of landslide maps, reducing the time and resources required to compile and systematically update them. In this paper, we demonstrate the applicability of Differential Sentinel-1A satellite SAR interferometry (DInSAR) to assess the movement activity and use the information for further updating the national landslide inventories in Bulgaria. We perform several analyses based on multi-temporal InSAR techniques of Sentinel-1A data over selected areas prone to landslides. The use of new opportunities for free access to satellite images, which can be applied in conjunction with other methods, greatly facilitates the processes of inventory, mapping and study of landslides.
Highlights
Landslides are part of natural destructive processes that can be natural or artificially caused by human activity
We demonstrate the use SAR data from S-1 processed by Differential SAR Interferometry (DInSAR) approach to produce a set of interferometric images (IFIs) for several local regions
The basis of DInSAR is the use of measurements from twophase images obtained in the same region at different times, which allows accurate measurement of relative distances DInSAR is a method that uses SAR data to create topographic maps or maps of the deformations of the earth's surface based on the registered differences of the phase signal during interferometric processing (Ferretti et al, 2007)
Summary
Landslides are part of natural destructive processes that can be natural or artificially caused by human activity Their manifestation can lead to catastrophic and catastrophic conditions in a number of regions of the world with a negative effect in terms of human casualties, severe socio-economic consequences and deterioration of the ecological environment. One of the advanced technologies for dynamic and real-time cartographic visualization in geodynamical active regions with landslide activity is the Differential SAR Interferometry (DInSAR) This method uses SAR data from two phase images obtained for the same region at different time intervals to create interferometric images for quantification of the registered movements of the earth's surface. Combined with other scientific research methods and visualization technologies it is widely exploited for geospatial processing of landslide activity, inventorying, mapping, and developing early warning and crisis management tools
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