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Harmonised Indicators for Forest Protection against Hazards in Alpine Space

Development of harmonised indicators and estimation procedures for forests with protective functions against natural hazards in the Alpine Space. The study focuses on forest area, hazard potential, damage potential, and protective effects at coarse and fine scales according to FAO guidelines.

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Harmonised Indicators for Forest Protection against Hazards in Alpine Space

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

  2. Indicators selected for: • Forest area • Coarse scale • Fine scale • Hazard Potential • Damage Potential • Protective effect • Coarse scale • Fine scale

  3. Forest area: • Coarse and fine scale • According FAO • Minimum crown cover • Minimum area • Minimum height

  4. Forest area: • Coarse and fine scale • According FAO • Minimum crown cover 30% • Minimum area 5000m² • Minimum height 2m

  5. Hazard potential: • Coarse and fine scale • Avalanche • Snow height • Snow cover region and altitude • Slope • Planar curvature • Minimum forest area

  6. Hazard potential: Avalanche

  7. Hazard potential: • Coarse and fine scale • Avalanche • Slope 28° – 55° • Planar curvature -2 – 0.2 • Minimum forested area 5000m²

  8. Hazard potential: • Coarse and fine scale - Avalanche

  9. Hazard potential: • Coarse scale • Rockfall • Slope • Outside the forest mask and inside the rock mask a slope threshold of 43° • Inside the forest mask a slope threshold of 39°

  10. Hazard potential: • Coarse and fine scale Rockfall • Slope

  11. Damage potential: • Coarse and fine scale • Data availability? • Buffer zone 25m

  12. Protective effect: • Avalanche • Coarse scale • Total crown cover • Coniferous crown cover

  13. Protective effect: • Avalanche • Coarse scale • Total crown cover • Coniferous crown cover

  14. Protective effect: • Avalanche • Fine scale • Total crown cover • Coniferous crown cover • Tree height • Gap length

  15. Protective effect: • Avalanche • Fine scale • Total crown cover • Coniferous crown cover • Tree height (AHP 1: -2m, AHP 2/3: 5m)

  16. Protective effect: • Avalanche • Fine scale • Gap length

  17. Protective effect: • Rockfall • Coarse scale • Forested slope length • Basal area

  18. Protective effect: • Rockfall • Coarse scale • Forested slope length (>200m) • Basal area

  19. Protective effect: • Rockfall • Fine scale • Forested slope length • Fraction of gaps • Stem density • DBH • (Stone size)

  20. Protective effect: • Rockfall • Fine scale • Forested slope length ( > 200m %) • Fraction of gaps (gap < 25%)

  21. Protective effect: • Rockfall • Fine scale • Stem density • DBH

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