add Filiur1 and Filisur2 data V0

avaFilisur1/README.md

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+# avaFilisur1
+
+## Event [23022012_1]
+
+### Changelog 
+- V1 - Initial data assembly (05-12-2025)
+
+### General description
+Based on Feistl et al. 2014
+
+- Location: Filisur, Switzerland
+- Date: 23.02.2012
+- Elevation: Release area at 1320 m a.s.l, runout at 1080 m a.s.l
+- Slope Angle, release to runout: 50-25°
+- Release Volume: 1080 m³
+- Terrain features (upper part/track/runout): channeled/unchanneled/unchanneled
+- Forest strucure (upperpart/track/runout): no forest/open/dense
+    - approx. 300 stems/ha, tree groups with low-hanging branches
+    - mixed tree age
+- Avalanche Type: wet snow avalanche
+- Temperature (dry/moist/wet): wet 
+- Key Field Observations: 
+    - Wedge-shaped deposits formed behind groups of trees and at branches low to the ground.
+    - Main stopping mechanism was "jamming" of snow between tree groups.
+
+### Available data
+Source CRS: EPSG:21781
+Final CRS: EPSG:2056
+
+- release area (avaFilisur1_release_area.gpkg)
+    - no documented thickness
+    - Feistl et al. 2014 used a standardized thickness of 1m for their modelling process
+- forest area (avaFilisur1_forest_area.gpkg)
+    - polygons categorized based on their forest density:
+        - "open"
+        - "dense"
+- deposition area (avaFilisur1_deposition_area.gpkg)
+    - no documented thickness
+- measurement points (avaFilisur1_measurement_points.gpkg)
+    - measured snow heights in the area of interest
+
+A digital elevation model (DEM) can be found at: https://www.swisstopo.admin.ch/de/hoehenmodell-swissalti3d 
+- Use the DEM for the region "Bergün Filisur (GR) in 2x2m.
+- If two tiles are necessary, don´t forget to merge them before modelling.  
+
+### Data source 
+- General Description: Feistl, T., Bebi, P., Teich, M., Bühler, Y., Christen, M., Thuro, K., & Bartelt, P. (2014). Observations and modeling of the braking effect of forests on small and medium avalanches. Journal of Glaciology, 60(219), 124-138.
+- Data Sources: provided by SLF Davos

avaFilisur2/README.md

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+# avaFilisur2
+
+## Event [23022012_2]
+
+### Changelog 
+- V1 - Initial data assembly (05-12-2025)
+
+### General description
+Based on Feistl et al. 2014
+
+- Location: Filisur, Switzerland
+- Date: 23.02.2012
+- Elevation: Release area at 1360 m a.s.l, runout at 1058 m a.s.l
+- Slope Angle, release to runout: 50-20°
+- Release Volume: 1390 m³
+- Terrain features (upper part/track/runout): channeled/unchanneled/unchanneled
+- Forest strucure (upperpart/track/runout): no forest/open/dense
+    - approx. 500 stems/ha, tree groups with low-hanging branches
+    - mixed tree age
+- Avalanche Type: wet snow avalanche
+- Temperature (dry/moist/wet): wet 
+- Key Field Observations: 
+    - Most avalanche mass was stopped at the forest edges, resulting in large wedge-shaped deposits along the sides of the main flow channel.
+    - The main avalanche channel was largely open and not forested.
+
+### Available data
+Source CRS: EPSG:21781
+Final CRS: EPSG:2056
+
+- release area (avaFilisur2_release_area.gpkg)
+    - no documented thickness
+    - Feistl et al. 2014 used a standardized thickness of 1m for their modelling process
+- forest area (avaFilisur2_forest_area.gpkg)
+    - polygons categorized based on their forest density:
+        - "open"
+        - "dense"
+- deposition area (avaFilisur2_deposition_area.gpkg)
+    - no documented thickness
+- measurement points (avaFilisur2_measurement_points.gpkg)
+    - measured snow heights in the area of interest
+
+A digital elevation model (DEM) can be found at: https://www.swisstopo.admin.ch/de/hoehenmodell-swissalti3d 
+- Use the DEM for the region "Bergün Filisur (GR) in 2x2m resolution.
+- If two tiles are necessary, don´t forget to merge them before modelling.  
+
+
+### Data source 
+- General Description: Feistl, T., Bebi, P., Teich, M., Bühler, Y., Christen, M., Thuro, K., & Bartelt, P. (2014). Observations and modeling of the braking effect of forests on small and medium avalanches. Journal of Glaciology, 60(219), 124-138.
+- Data Sources: provided by SLF Davos