Rock characteristics          
  Rock dimensions (3x)  
  m                                
  Rock density     kg m-3  
  Rock shape     -  
 
  Slope characteristics          
  Mean gradient of the slope     º  
  Height of the cliff     m  
  Length of the forested slope (planimetric)     m  
  Length of non-forested slope (planimetric)     m  
 
  Forest characteristics          
  Mean stand density (DBH ≥ 8 cm)     ha-1  
  Basal area (DBH ≥ 8 cm)     m2/ha  
    OR          
  Mean diameter at breast height (DBH; ≥ 8 cm)              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. Current degree of protection: 1 - 100 %
 

  2. Ideal forest profile for rockfall protection:
 

 
 

  Required density with DBH ≥ 8 cm:   tr./ha
Required density with DBH ≥ 12 cm:   tr./ha
Required density with DBH ≥ 24 cm:   tr./ha
Required density with DBH ≥ 36 cm:   tr./ha
 

  - Ideal basal area (DBH ≥ 8 cm; ideal target profile):  m2/ha
- Minimum stand basal area (DBH ≥ 8 cm; minimum target profile):   at least m2/ha
- Required basal area (DBH ≥ 8 cm) for an optimal energy dissipation (to potentially stop all falling rocks):  ??? m2/ha
 

  Data used for the calculation:

Rock volume = 0 m3
Rock mass = 0 kg
Maximum rock energy in the forest = 0 kJ
Length of the forested slope (measured along the slope) = m
Current stand basal area = 30 m2 ha-1