Inputs


Multiple factors contributing to landslide susceptibility were considered in the Veneto region.

Slope gradient is one of the most important factors in slope stability assessments. Gravity tends to pull earth materials downslope; the steeper the slope, the greater the component of gravity parallel to the slope.

Slope

Different rock types have different strengths, for example, foliated metamorphic rocks are weaker than granitic rock. The presence of faults is an important factor to determine landslide susceptibility.

Geology and Faults

Land cover can be an indicator of different types of landslide activity.

Land Cover

Surficial deposit genesis, material, texture, thickness, geomorphic form, and process are important factors in the determination of landslide susceptibility. 

Soils

Watersheds are used to calculate the Melton ratio, which is a parameter used to determine which creeks are more susceptible to debris flows, rather than debris floods or floods.

Watersheds

Landslides are very likely after a wildfire, as water cannot infiltrate the soil. Runoff and erosion increase as the soil becomes water repellent and loses cohesion because of the fire heat. Then, roots of dead trees decay and do not support the slope with their anchoring effect anymore.

Fires

Slope modification caused by road or railroad construction may destabilize slope.

Roads and Railroads

Stream order is and indicator of possible debris flow activity. For example, debris flows occur periodically in first and second order streams.

Streams

The inventory includes landslides that have been identified as part of the IFFI project. The INSPIRE Natural Hazard Category Value code list was extended to include the updated Varnes landslide classification (Hungr et al., 2014), and the data was aligned to this standard.

Italian Landslide Inventory

Permafrost degradation is a very important factor for landslide activity in cold and high elevation regions.

Permafrost and Ice