Active Landslide inventory mapping and susceptibility zoning in Western Greece

Active Landslide inventory mapping and susceptibility zoning in Greece

The use case provideS an active inventory map of the occurred landslides updated after every new
event recorded in the database. It is also possible to retrieve data concerning the landslides’ characteristics
(type of movement, causes, season and year of occurrence,..), as well as any information available for the
region of occurrence (geology, precipitation, altitude, slope,…). Taking into account the above data, a
division of the land into homogeneous areas is produced according to the landslides’ occurrence
percentage (Landslides’ density map). Additionally, it is possible for the users to select one or more
specific parameters or characteristics and calculate the frequency of landslides accomplishing these
criteria. More specific, users are able to select landslides by location or landslides by characteristics
such as their type, the season - year of their occurrence, their dimensions or the type of the area of
occurrence such as lithology, slope inclination, altitude, etc.
The calculation of the spatial probability of landslide occurrence produces a susceptibility zoning map
available to the system. The map is the result of the analysis between the spatial distribution of the
landslides (landslides’ density) and a group of generative causes (such as geological, topographical, hydrological
etc characteristics of the area) based on the fact that landslides in the future will occur under the same
circumstances that they occurred in the past. The calculation of the density map will be redone every time
new data for the study area will be provided to the database.
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