AVAL-1D is a numerical avalanche dynamics program. It can compute runout distances and the speed and pressure patterns that arise in dense flow and powder avalanches.

Avalanche hazard maps are prepared by engineers and land-planners. These experts rely both on practical experience and calculation models to predict avalanche runout distances and flow velocities. Flowing and powder snow avalanche models have been under development for some time at the SLF. Emphasis was put on an easy-to-use graphical user interface for both flowing and powder snow avalanches. These one-dimensional computer-based models have now reached a level of development where they can be introduced to practitioners. The graphical user interface was programmed in IDL (Interactive Data Language).