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

Final Meeting Indicators selected for: –Forest area -Coarse scale -Fine scale –Hazard Potential –Damage Potential –Protective effect -Coarse scale -Fine scale

Final Meeting Forest area: –Coarse and fine scale -According FAO -Minimum crown cover -Minimum area -Minimum height

Final Meeting Forest area: –Coarse and fine scale -According FAO -Minimum crown cover 30% -Minimum area5000m² -Minimum height2m

Final Meeting Hazard potential: –Coarse and fine scale -Avalanche -Snow height -Snow cover region and altitude -Slope -Planar curvature -Minimum forest area

Final Meeting Hazard potential: Avalanche Alpine Region Altitudinal zone (hazard potential) CodeRegion 12 Austria A100Vorarlberg ≥ 700 m≥ 900 m A210Northern Alps – West Zone ≥ 800 m≥ m A220Northern Alps – Middle Zone ≥ 750 m≥ m A230Northern Alps – East Zone ≥ 700 m≥ 900 m A310Western Central Alps – West Zone ≥ 900 m≥ m A320Western Central Alps – Middle Zone ≥ m≥ m A330Western Central Alps – East Zone ≥ 900 m≥ m A400Eastern Central Alps ≥ 800 m≥ m

Final Meeting Hazard potential: –Coarse and fine scale -Avalanche -Slope28° – 55° -Planar curvature-2 – 0.2 -Minimum forested area5000m²

Final Meeting Climatic avalanche hazard potential Slope gradient - 28°>28 – 34°>34 – 39°>39 – 55°> 55° Avalanche hazard potential of slope gradient Avalanche hazard potential (AHP) Hazard potential: –Coarse and fine scale - Avalanche

Final Meeting 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°

Final Meeting Hazard potential: –Coarse and fine scale Rockfall -Slope

Final Meeting Damage potential: –Coarse and fine scale -Data availability? -Buffer zone 25m

Final Meeting Protective effect: –Avalanche -Coarse scale -Total crown cover -Coniferous crown cover

Final Meeting Protective effect: –Avalanche -Coarse scale -Total crown cover -Coniferous crown cover

Final Meeting Protective effect: –Avalanche -Fine scale -Total crown cover -Coniferous crown cover -Tree height -Gap length

Final Meeting Protective effect: –Avalanche -Fine scale -Total crown cover -Coniferous crown cover -Tree height (AHP 1: -2m, AHP 2/3: 5m)

Final Meeting Protective effect: –Avalanche -Fine scale -Gap length Slope (°)Critical gap length (m)

Final Meeting Protective effect: –Rockfall -Coarse scale -Forested slope length -Basal area

Final Meeting Protective effect: –Rockfall -Coarse scale -Forested slope length (>200m) -Basal area Basal areaLevel of protective effect of forest ≥ 25 m 2 /ha1 – high 15 – 25 m 2 /ha2 – medium < 15 m 2 /ha3 – low

Final Meeting Protective effect: –Rockfall -Fine scale -Forested slope length -Fraction of gaps -Stem density -DBH -(Stone size)

Final Meeting Protective effect: –Rockfall -Fine scale -Forested slope length ( > 200m %) -Fraction of gaps (gap < 25%)

Final Meeting Protective effect: –Rockfall -Fine scale -Stem density -DBH Stone sizeTrees/haDBHTrees/haDBHTrees/haDBH Small>600>12 cm>400>12 cm≤400≤12 cm Medium>400>24 cm>300>24 cm≤300≤24 cm Large>200>36 cm>150>36 cm≤150≤36 cm Protective effect1 - high2 - medium3 - low