Original Article Analysing Landslides Spatial Distribution Using GIS. Case study: Transylvanian Plain ROŞIAN Gheorghe 1 , Csaba HORVATH 2 , Liviu MUNTEAN 1 , Radu MIHĂIESCU 1 , Viorel ARGHIUŞ 1 , Cristian MALOȘ 1 , Nicolae BACIU 1 , Vlad MĂCICĂȘAN 1 , Tania MIHĂIESCU 3* 1 ”Babeş-Bolyai” University, Faculty of Environmental Science and Engineering, 30 Fântânele Street, 400294 Cluj - Napoca, Cluj County, Romania 2 ”Babeş-Bolyai” University, Faculty of Geography, 5-7Clinicilor Street, 400006 Cluj-Napoca, Cluj County, Romania 3 University of Agricultural Sciences and Veterinary Medicine, Faculty of Agriculture, 3-5 Manastur St. 400372, Cluj- Napoca, Cluj County, Romania Received 6 August 2016; received and revised form 22 August 2016; accepted 18 September 2016 Available online 28 September 2016 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. 1. Introduction One of the main geomorphological processes from Transylvanian Plain is represented by landslides. The Transylvanian Plain is placed in the central part of the Transylvanian Basin, from the proximal units, it is delimitated by valley corridors. * Corresponding author. Tel: +40-264-596384 Fax: ++40-264-593792 In this regard we distinguish, the Someşul Mare Corridor in the North, Someşul Mic Corridor in the West, Mureş Corridor in the South and, Dipşa and Luţu Valley in the East. On its 390.362 ha surface 4.109 landslides were identified, which represent 37.359 ha, almost 10% of the entire area. These are, on one side the result of the geological substrates, and on the other side the result of the lands use which is significantly influenced by the anthropic. Available online at http://journals.usamvcluj.ro/index.php/promediu ProEnvironment ProEnvironment 9 (2016) 366 - 372 366 e-mail: tmihaiescu@yahoo.com