r.avaflow 2.4 Training data
by Martin Mergili and Julia Krenn
r.avaflow 2.4 is evaluated against well-documented real-world events. The events selected for model evaluation cover a broad range of process types - including process chains - collected from a diverse selection of study areas around the globe. Computer-generated landscapes are used to explore the plausibility of the simulation results for complex process chains where no or insufficient reference data are available. This page provides selected training data sets which can be used to explore the functionalities of r.avaflow 2.4 and the associated scripts.
This generic landscape builds on a wide mountain valley with an amphitheatre-shaped head. A reservoir is impounded by a dam with triangular cross section. Two landslide release areas shaped as distorted hemispheres are defined on the slopes heading into the reservoir. The purpose of this landscape is to explore the plausibility of r.avaflow simulation results for complex process chains, with a particular focus on landslide impacts on reservoirs and the resulting flood waves downstream. An input hydrograph and an output hydrograph profile are defined in addition to the two landslide release masses. The start script provided serves for two computational experiments with different configurations of landslide and hydrograph release. Some experiments performed on this generic landscape are described in detail by Mergili et al. (2017).
A further set of files (cmd script and ArcGIS Pro project file) is available for the creation of 3D animations of selected results produced for this computer-generated landscape. Please note that you have to modify the pathes in both files.
A symmetrical bell-shaped mound with an elevation difference of 400 m and an average slope of approx. 14 degrees is defined. Eight evenly-spaced landslide release areas, shaped as distorted hemispheres, are defined in the upper part of the mound. The start script provided serves for one computational experiment where each of the eight landslides shows its individual composition of solid, fine-solid, and fluid material. Consequently, these landslides move downslope at different velocities and display specific patterns of runout and lateral spreading. This experiment is described in detail by Pudasaini and Mergili (2019).
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.avaflow 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. Some experiments performed on the Acheron Rock Avalanche are described in detail by Mergili et al. (2017).
A further set of files (cmd script, ArcMap 10.5 project files, and two shapefiles) is available for the visualization of travel times and frontal velocities of selected results produced for this training data. Note that you have to modify the pathes in both files.
