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Development of Harmonised Indicators and Estimation Procedures for Forests with Protective Functions against Natural Hazards in the Alpine Space Basic Data. Overview on data used: NFI data/models Thematic data Digital terrain model Landsat imagery LiDAR Digital aerial photography.
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Development of Harmonised Indicators and Estimation Procedures for Forests with Protective Functions against • Natural Hazards in the • Alpine Space • Basic Data
Overview on data used: • NFI data/models • Thematic data • Digital terrain model • Landsat imagery • LiDAR • Digital aerial photography
NFI data: • From four alpine countries • Austria • Switzerland • Slovenia • Germany
NFI data: • Forest Mapping • Forest/Nonforest • Protective effect estimation • Volume/ha • Stems/ha • Basal area/ha • DBH • Tree height
NFI models: • Protective effect estimation • Crown coverage • Basal area • BHD
NFI models: • Basal area G/ha = 0.7819 * V0.6719 G/ha = basal area, V = Volume/ha (m3/ha)
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
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.
Thematic data: • Hazard potential • Rock mask • Snow cover regions • Damage potential • Infrastructure
Digital terrain model (1): • Forest mapping • Radiometric correction • kNN (vertical search radius) • Hazard potential • Altitude • Slope • Planar curvature • Damage potential • Infrastructure
Digital terrain model (2): • Forest with protective function • Watershed function • 8D Avalanche model • Forest with protective effect • Forested slope length • Altitude
Landsat imagery: • 4 Scenes • 1999 - 2001 • Coarse scale • Forest mapping • Forest protective effect estimation
LiDAR data: • Fine scale • Paznauntal • 2006, 30 km2 • no raw data • DTM Resolution 1m • CHM Resolution 1m • Engadin • 2003, 300 km2 • no raw data • DTM Resolution 2,5m • CHM Resolution 2,5m
Digital aerial photography: • Fine scale • Paznauntal • 2006, 30 km2 • Ultracam Vexcel • Resolution 0,5m • RGB/FIR • Engadin • 2005, 300 km2 • ADS40 1st Generation • Resolution 0,5m • RGB