11/3/2022 0 Comments Route 66 map torrent![]() The refined geo-database realized includes 22,028 shallow landslides, occurred between 19. The method is applied referring to the Calabria region, which is largely affected by this landslide category. To achieve this aims we propose a method that introduces structurally in a possible circular approach (progressive better results with constantly upgraded knowledge) the use of a comprehensive geo-database of shallow landslide events and related implemented through a collection and analysis of numerous sources, including published inventory maps, scientific literature, technical reports and newspapers, integrated by a multi-temporal interpretation of remote sensing images and several field surveys. ![]() To take the highlighted goal it is opportune to promote the use of a circular approach that can considers knowledge (data, methods, models, solutions, etc.) constantly upgraded. ![]() In these conditions, it is useful to refine shallow landslides susceptibility maps at regional scale progressively more reliable and efficacy. These slope instabilities cause damage to many roads, buildings, and infrastructures and often human loss. Intense rainfall events often produce a great number of shallow landslides events, which in many cases can hits large areas or an entire regional territory. These goals are essential for land management with risk prevention assessment and landslides forecasting aimed to effective early warning systems (Paudel et al. 2003 Gull a, Mandaglio, Moraci, and Sorriso-Valvo 2004 Gull a et al. Thus, it is important to recognized, characterized and predict spatio-temporal shallow landslides occurrence affected by complex processes involving different hydrological, morphological and geotechnical properties of the soils (Gull a and Sorbino 1996 Van Asch et al. 2009 Gao and Maro 2010 Garc ıa-Ruiz et al. Shallow landslides occur in areas where climatic condition, weathered rocks, soil characteristics, land use/cover, and morphological features can promote their trigger (Deere and Patton 1971 Bilotta et al. 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. The followed approach proved to be satisfactory for a feasibility study level when base and thematic maps are incomplete or lacking. ![]() Preliminary landslide susceptibility analyses were also carried out in GIS environment. 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. 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. 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. ![]() 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. Over the study area (extending for approximately 1000 km 2), 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 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. 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. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |