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DEM |
Digital Elevation Model, required input data for RAMMS. |
Friction parameters |
The friction parameters used in RAMMS are called μ (Mu) and ξ (Xi), also refered to as MuXi. Via these two parameters, friction differences according to topography and forest are taken into account. |
Hydrograph |
Temporal input mass flux for debris flow modeling |
Imagery |
Georeferenced aerial or satellite remote sensing data used for visualization in RAMMS. They have to be in .tif format and have to come with a world file (.tfw).
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Log file |
Test file containing important information about the calculation. |
μ (Mu) |
dry-Coulomb friction coefficient (-) of the Voellmy model. |
RAMMS |
Rapid Mass MovementS, numerical simulation software for snow-avalanche and debris flow calculations. 
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Release area |
Area from where the process releases, defined by polygons and release height. |
Release height |
Defines the mean height of the release area. Together with the release area it defines the release volume. |
Release volume |
Release height multiplied by the release area, displayed in m3. |
Runout distance |
The point of farthest reach. Often difficult to define in three-dimensional terrain.
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SLF |
WSL Institute for Snow and Avalanche Research SLF. 
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Starving |
The process by which small avalanches stop. Mass is withdrawn from the front of the avalanche and runs out. |
World file |
A world file is a plain text computer data file used by geographic information systems to georeference imagery. |
WSL |
Swiss Federal Institute for Forest, Snow and Landscape Research. 
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ξ (Xi)
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Velocity squared drag coefficient (m/s2) of the Voellmy model. |
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