1. Development of Harmonised Indicators and Estimation Procedures for Forests with Protective Functions against
Natural Hazards in the
Alpine Space
Basic Data

2. Overview on data used: NFI data/models Thematic data
Digital terrain model
Landsat imagery
LiDAR
Digital aerial photography

3. NFI data: From four alpine countries Austria Switzerland Slovenia
Germany

4. NFI data: Forest Mapping Protective effect estimation Forest/Nonforest
Volume/ha
Stems/ha
Basal area/ha
DBH
Tree height

5. NFI models:
Protective effect estimation
Crown coverage
Basal area
BHD

6. NFI models: Basal area G/ha = 0.7819 * V0.6719 G/ha = basal area,
V = Volume/ha (m3/ha)

7. NFI models: DBH DBH = -129.574 + 1,7114 * HnDSM + 8.8813 * HDTM
DBH = Breast Height Diameter in cm
HnDSM = height from the nDSM in dm
HDTM = height from the DTM in hm

8. NFI models: Crown coverage TCC = 0.236 - 0.1461 * HDTM -0.1227 * Hm +
4.0624*log(V)
TCC = total crown cover
Hm = Mean tree height (m)
HDTM = height from the DTM (hectometres)
V = Volume/ha (m3/ha)
The coniferous crown cover (CCC) is then estimated by multiplying TCC with the volume fraction of coniferous trees.

9. Thematic data: Hazard potential Damage potential Rock mask
Snow cover regions
Damage potential
Infrastructure

10. Digital terrain model (1):
Forest mapping
Radiometric correction
kNN (vertical search radius)
Hazard potential
Altitude
Slope
Planar curvature
Damage potential
Infrastructure

11. Digital terrain model (2):
Forest with protective function
Watershed function
8D Avalanche model
Forest with protective effect
Forested slope length
Altitude

12. Landsat imagery: 4 Scenes Coarse scale 1999 - 2001 Forest mapping
Forest protective effect estimation

13. LiDAR data: Fine scale Paznauntal Engadin 2006, 30 km2 no raw data
DTM Resolution 1m
CHM Resolution 1m
Engadin
2003, 300 km2
DTM Resolution 2,5m
CHM Resolution 2,5m

14. Digital aerial photography:
Fine scale
Paznauntal
2006, 30 km2
Ultracam Vexcel
Resolution 0,5m
RGB/FIR
Engadin
2005, 300 km2
ADS40 1st Generation
RGB

15. Coarse scale RS mapping approach Fine scale RS mapping approach
Subsystem
Statistical approach
Coarse scale RS mapping approach
Fine scale RS mapping approach
Hazard
Hazard potential
Forest mask (kNN), DTM
Forest mask (LiDAR), DTM
Avalanche
Rock mask, DTM
Forest mask (kNN), Rock mask, DTM
Forest mask (LiDAR), Rock mask, DTM
Rockfall
Damage potential
DTM, Infrastructure
DTM, Rock mask, Infrastructure
Forest protective effect
NFI data
NFI data + Parameter layer (Landsat)
Parameter layer (LiDAR + digital aerial photo) -
Output
Statistical estimates of protective effect
Maps of protective effect