r.randomwalk 2.0 is evaluated against well-documented real-world events. The events selected for model evaluation are collected from a diverse choice of study areas around the globe. This page provides selected training data sets which can be used to explore the functionalities of r.randomwalk 2.0 and the associated scripts. Release files and start scripts are available for all test areas in Mergili et al., 2015. GRASS Locations are provided for those test areas where the data may be freely distributed. Perform the following steps to run r.randomwalk for one of those areas:
- Extract the GRASS Location somewhere into your home directory and open GRASS 7.8 with this location.
- Save the release file and the start script into any place in your home directory. It is, however, important that both files are placed in the same directory.
- Within GRASS, use the command line terminal to change to the directory with the start script and the release file, and to execute the start script with sh [scriptname]. [scriptname] stands for the name of the start script of the corresponding test area. All results will be placed in the active GRASS Location (GRASS raster maps) or in the current directory (everything else).
With the given start scripts you can easily combine multiple simulations, and you should be able to reproduce the results presented in Mergili et al., 2015 (even though there will be some minor differences due to randomization). You may edit the start scripts in order to explore how changes in the parameter settings influence the model results and the computational times. Please refer to the user manual for details with regard to the flags and options.
Acheron Rock Avalanche, New Zealand
Prehistoric rock avalanche with a volume of 6.4 million cubic metres
The Acheron Rock Avalanche is a prehistoric event that occurred approx. 1100 years BP in Canterbury, New Zealand. It is characterized by an estimated volume of 6.4 million cubic metres and a travel distance of approx. 3.55 km. The flow path displays a sharp bend, and lateral spreading to some tributary valleys was limited. This example is used to test r.randomwalk for rock avalanches, exploring the possibility of multiple parallel model runs and the complementary function for stopping. The GRASS location for the Acheron Rock Avalanche and the corresponding start script for launching the computational experiments are provided. The start script consists in procedures for parameter testing and the generation of an impact indicator index.
Kao Ping Watershed, Taiwan
Mountainous watershed with numerous rainfall-triggered landslides
61.5 square kilometre test area with 207 new landslides mapped after the Typhoon Morakot in 2009. The start script includes the back-calculation of the observed landslides and, on this basis, the computation of impact probabilities. The results are validated using ROC Plots.
Gunt Valley, Tajikistan
High-mountain area susceptible to glacial lake outburst floods (GLOFs)
2106 square kilometre area with 113 high-mountain lakes some of which are susceptible to sudden drainage. The start script is used to compute impact indicator scores related to possible future lake outburst floods.
Please cite this site and its content as: Mergili, M., 2014-2021. r.randomwalk - The landslide routing tool. r.randomwalk 2.0 Training data. https://www.randomwalk.org/data.php