Analysing Landslides Spatial Distribution Using GIS. Case study: Transylvanian Plain

Gheorghe Roșian, Csaba Horvath, Liviu Muntean, Radu Mihăiescu, Viorel Arghiuș, Cristian Maloș, Nicolae Baciu, Vlad Măcicășan, Tania Mihăiescu

Abstract


From all the geomorphological processes, specific to Transylvanian Plain, landslides stand out. The mentioned regional unit is placed geographically on the central part of the Transylvanian Basin (large depression area placed in the interior of Carpathian Mountains). In order to analyse the distribution of the landslides we took into consideration 5 criteria: geology, altitude, slope, exposition and the administrative units. This type of study is necessary on one hand to find out the way in which the current landslides are distributed, on the other hand, the research will collect information on the susceptible areas which are prone to this type of geomorphological processes. Following the analysis of the ortophotoplans and topographic maps a number of 4.109 landslides were vectorised. Considering the land use landslides are found mainly on agricultural lands. Taking into consideration the lithologic conditions (the presence of friable rocks such as marns, clays, marl clay) and the land use (mostly agricultural lands), it is believed that in the future landslides will appear on similar slope, orientation and geological conditions etc. In this situation, knowing the susceptible areas to landslides is beneficial also for the territorial planning actions but also to avoid the settlement of buildings and other civil engineering constructions on lands which are prone to landslides.

 


Keywords


landslides, spatial statistics, distribution, GIS

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