Geo-Informational Approach to Risk Analysis of Slope Mass Movement Sergii Babichev 1,2 , Tetiana V. Kril 3 , Stella B. Shekhunova 3 and Waldemar Wójcik 4 1 Jan Evangelista Purkyne University in Usti nad Labem, Ceske mladeze, 8, Usti nad Labem, 40096, Czech Republic 2 Kherson State University, Universytetska st. 27, Kherson,73003, Ukraine 3 Institute of Geological Sciences, NAS of Ukraine, O. Honchara Str., 55-b, Kyiv, 01054, Ukraine 4 Lublin University of Technology, Nadbystrzycka Str., 38 D, Lublin, 20-618, Poland Abstract The assessment of the development of dangerous erosion and slope mass movement processes has been done for the territory around Verhnie Vodiane and Solotvyno area (Transcarpathian region, Ukraine). The risk analysis has been carried out with reliance on the evaluation of meteorological and geomorphological factors. Remote sensing data have been processed using a geoinformation system and a database of indicators such as slope steepness and Normalized Difference Moisture Index (NDMI). The risk matrix for analyzing slope mass movement was constructed. Risk gradation was assessed as the percentage of recorded landslide areas with different ranges of meteorological and geomorphological factors. The indicator values with extreme risk of dangerous processes were determined. It is shown that with an increase in the angle of slope steepness, a simultaneous increase in the NDMI value indicates the possible development of landslides. The risk matrix obtained can be used to predict the slope prone to mass movement for areas with a steepness of 5°40' to 24° and geological (lithological) conditions similar to Quaternary deposits of alluvial, deluvial, eluvial-deluvial and deluvial-colluvial genesis. Keywords1 Risk analysis, GIS techniques, landslides, slope steepness, moisture index. 1. Introduction Hazardous exogenous geological processes occurring on the slopes of river valleys, ravines and gullies, mountain slopes and sea coasts in abnormal weather conditions (showers, snowfalls / snowmelt, floods, storms) can be destructive, they threaten the lives and activities of people, agriculture, create the risks of emergencies. The patterns of slope mass movement and erosion CITRisk’2021: 2nd International Workshop on Computational & Information Technologies for Risk-Informed Systems, September 16–17, 2021, Kherson, Ukraine EMAIL: sergii.babichev@ujep.cz (S.Babichev); kotkotmag@gmail.com (T.Kril); shekhun@gmail.com (S.Shekhunova); waldemar.wojcik@pollub.pl (W.Wójcik) ORCID: 0000-0001-6797-1467 (S.Babichev); 0000-0002-4324-9231 (T.Kril); 0000-0002-5975-3491 (S.Shekhunova); 0000-0002- 0843-8053 (W.Wójcik) © 2021 Copyright for this paper by its authors. Use permitted under Creative Commons License Attribution 4.0 International (CC BY 4.0). CEUR Workshop Proceedings (CEUR-WS.org)