Landslide Susceptibility Mapping Using GIS-Based Methods in the Bükkalja (Hungary)

In foothills and mountainous areas, we can often encounter mass movement processes, which suddenly and spectacularly change the surface. These processes are still actively involved in the formation of valleys [1], which can potentially trigger a lot of damage to human lives and property. The best way to predict surface movement processes is exploring sensitive areas of surface movement. Maps the significance of mass movements have been made since the early 1970s and 1980s. In order to validate these old maps field investigations were conducted. The target area of our research was the Bükkalja (Foothill of the Bükk Mountains). On the basis of the Central Geological Office (CGO) survey [2], the density of landslide movements in the examined area is 5-10 movements/100 km, these movement processes occur on 0-25% of western part and 20-50% of eastern part of the Bükkalja [3]. In our work, we have mapped the landslide susceptibility by applying 4 different GIS-base methods, published in the scientific literature. Our aim was to analyse the results of these methods and to compare these maps with the susceptibility map based on the CGO survey.