Slope characteristics          
  Mean gradient of the slope     º                                                                 
  Estimated depth of the slide plane                  m  
  Effective friction angle of the soil     º  
  Effective soil cohesion     kPa  
  Safety Factor (SF)     -  
 
  Forest characteristics          
  Mean stand density     /ha  
  Mean diameter at breast height (DBH)     cm  
  Occurrence of dominant tree species:        
  - Norway spruce (Picea abies)     %  
  - Silver fir (Abies alba)     %  
  - European beech (Fagus sylvatica)     %  
  - Other broadleaved species     %  
  - Other coniferous species     %  

 

 
  1. Overall landslide probability:

- Without forest: %
- With the above-defined forest: %
 

  2. Current degree of protection: ??? - ??? %
 
 
 

  Data used for the calculation:

- Safety Factor (SF) of slopes at the point of failure (critical) = 1.25
- Lateral reinforcement by tree roots = kN/m
- Average basal reinforcement by tree roots = kPa
- Weight of the forest vegetation = t/m (on average ±0 cm of soil)