DAN-W is a windows-based geotechnical software tool used for dynamic runout analysis of rapid landslides and rock avalanches. The program accepts user-input data in the form of path slope and initial sliding mass geometries, and material properties based on eight types of rheologies. For pseudo-three-dimensional analysis, the width of the slide can also be specified. A Lagrangian solution of the integrated equations of motion is then implemented for thin elements of the flowing mass. The sliding mass is animated on the screen as the calculation progresses. The model also simulates erosion and deposition of material. Output data includes:
- horizontal distance travelled by the sliding mass,
- velocity and flow depth along the path and at pre-determined observation points,
- time of travel,
- final slide mass volume,
- and detailed geometry and physical data for each time step.
DAN-W is based on a theory of runout analysis developed by Hungr (1995). For further information, please download the following PDF references:
Hungr, O., 1995. A model for the runout analysis of rapid flow slides, debris flows and avalanches. Canadian Geotechnical Journal, 32(4):610-623. (1300Kb)
Hungr, O. and Evans, S.G., 1996.
Rock avalanche runout prediction using a dynamic model. Procs., 7th. International Symposium on Landslides, Trondheim, Norway, 1:233-238. (200Kb)