The paper presents the preliminary results of an ongoing international multidisciplinary project funded by the United Nations Development Programme (UNDP) over the Polog Region in R.N. Macedonia. The combined effects of a complex geological setting, an articulate morphology and particular climate conditions make the Polog Region one of the most landslide-prone areas in the country. Over the study area (extending for approximately 1000 km2), preliminary landslide susceptibility studies were performed; however, the extent of landslide hazard in the region needs to be understood to a higher level of detail. The aim of the project is to detect critical sediment sources in the Polog Region and propose technical measures - at a feasibility study level - for the areas exposed to the highest hazard level. In the first stage, via the joint contribution of geologists/geomorphologists, hydrologists, geotechnical and hydraulic engineers, the activities focused on the preparation of thematic sediment source maps, among which the landslide inventory is of highest importance. Preliminarily, base activities entailed i) the analysis of old and recent geological and topographic maps as well as technical reports on past landslides, ii) field surveys, and iii) the collection of witnesses to particular landslide events. The collected data were then analyzed in combination with wide-area airborne LIDAR (Light Detection and Ranging) and displacement measurements by means of satellite multipass Synthetic Aperture Radar Differential Interferometry (DInSAR), which was applied for the first time in this region for such a purpose. Preliminary landslide susceptibility analyses were also carried out in GIS environment. The followed approach proved to be satisfactory for a feasibility study level when base and thematic maps are incomplete or lacking. The obtained results allowed i) gathering an overview of the unstable conditions affecting the slopes of Polog Region and ii) detecting the most landslide-prone areas, wherein more detailed studies should be addressed in the following stages of the project.

Landslide characterization in the Polog Region (R.N. Macedonia) by innovative and conventional methods

Nicodemo G.;Peduto D.
2021-01-01

Abstract

The paper presents the preliminary results of an ongoing international multidisciplinary project funded by the United Nations Development Programme (UNDP) over the Polog Region in R.N. Macedonia. The combined effects of a complex geological setting, an articulate morphology and particular climate conditions make the Polog Region one of the most landslide-prone areas in the country. Over the study area (extending for approximately 1000 km2), preliminary landslide susceptibility studies were performed; however, the extent of landslide hazard in the region needs to be understood to a higher level of detail. The aim of the project is to detect critical sediment sources in the Polog Region and propose technical measures - at a feasibility study level - for the areas exposed to the highest hazard level. In the first stage, via the joint contribution of geologists/geomorphologists, hydrologists, geotechnical and hydraulic engineers, the activities focused on the preparation of thematic sediment source maps, among which the landslide inventory is of highest importance. Preliminarily, base activities entailed i) the analysis of old and recent geological and topographic maps as well as technical reports on past landslides, ii) field surveys, and iii) the collection of witnesses to particular landslide events. The collected data were then analyzed in combination with wide-area airborne LIDAR (Light Detection and Ranging) and displacement measurements by means of satellite multipass Synthetic Aperture Radar Differential Interferometry (DInSAR), which was applied for the first time in this region for such a purpose. Preliminary landslide susceptibility analyses were also carried out in GIS environment. The followed approach proved to be satisfactory for a feasibility study level when base and thematic maps are incomplete or lacking. The obtained results allowed i) gathering an overview of the unstable conditions affecting the slopes of Polog Region and ii) detecting the most landslide-prone areas, wherein more detailed studies should be addressed in the following stages of the project.
2021
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11386/4779896
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