com9MoTVoellmy: NGI MoT-Voellmy

Note

This module (as well as this documentation) is currently under development and highly experimental! The parameter settings are completely untested and unchecked. Do not expect sensible results with the included settings!

com9MoTVoellmy allows to run the MoT-Voellmy code by Norwegian-Geotechnical-Institute (MoT-Voellmy github repository).

More information and background can be found there as well MoT-Voellmy Documentation

This documentation covers issues related directly to running MoT-Voellmy with the help of AvaFrame

There are 2 ways of running, please choose below.

MoT Voellmy via QGis

Installation on Windows:

  1. Start QGis and go to Plugins -> Manage and install plugins

  2. Choose All, search for OpenNHM and install/update

  3. You find the OpenNHM toolset in the Processing Toolbox

  4. Go to AvaFrame_experimental and start MoTVoellmy (com9)

Input

For additional info, see also NGI Documentation.

Required is

ONE of the following:

  • release area scenario as (multi-) polygon shapefile

    • the release area polygon must not contain any “holes” or inner rings

    • the release area name should not contain an underscore.

    • recommended attributes are name, thickness (see Release-, entrainment thickness settings)

    • ALL features within one shapefile are released at the same time (and interact), this is what we refer to as scenario

    • if you want to simulate different scenarios with the same features, you have to copy them to separate shapefiles

  • release area scenario as raster file

    • same specifications as the DEM (extent, cellsize)

And the following optional raster files, in the same specification as the DEM (extent, cellsize):

  • mu / Dry friction coefficient. If this is given, k needs to be set as well.

  • k / Turbulent friction coefficient. If this is given, mu needs to be set as well.

  • b0 / Erodible snow depth. If this is given, tau_c needs to be set as well.

  • tau_c / Snow shear strength. If this is given, b0 needs to be set as well.

  • nd / Forest density. If this is given, bhd needs to be set as well.

  • bhd / Tree diameter. If this is given, nd needs to be set as well.

The Destination Folder should be empty!

Outputs

After you ran the simulation, the peak fields will be loaded in QGis and the Destination Folder will contain, results, plots, and configuration files.

MoT Voellmy via the script variant

To run

  • go to AvaFrame/avaframe/com9MoTVoellmy

  • copy com9MoTVoellmy/com9MoTVoellmyCfg.ini to com9MoTVoellmy/local_com9MoTVoellmyCfg.ini and edit (if not, default values are used)

  • make sure all the required inputs are available in the avalanche directory

  • enter the path to the desired dataset in local_avaframeCfg.ini

  • run:

    pixi run python runCom9MoTVoellmy.py