Name
Abstract | ||
|---|---|---|
Two microcomputer-based numerical models (Dynamic ANalysis (DAN) and three-dimensional model DAN (DAN3D)) have been developed and extensively used for analysis of landslide runout, specifically for the purposes of practical landslide hazard and risk assessment. The theoretical basis of both models is a system of depth-averaged governing equations derived from the principles of continuum mechanics. Original features developed specifically during this work include: an open rheological kernel; explicit use of tangential strain to determine the tangential stress state within the flowing sheet, which is both more realistic and beneficial to the stability of the model; orientation of principal tangential stresses parallel with the direction of motion; inclusion of the centripetal forces corresponding to the true curvature of the path in the motion direction and; the use of very simple and highly efficient free surface interpolation methods. Both models yield similar results when applied to the same sets of input data. Both algorithms are designed to work within the semi-empirical framework of the ''equivalent fluid'' approach. This approach requires selection of material rheology and calibration of input parameters through back-analysis of real events. Although approximate, it facilitates simple and efficient operation while accounting for the most important characteristics of extremely rapid landslides. The two models have been verified against several controlled laboratory experiments with known physical basis. A large number of back-analyses of real landslides of various types have also been carried out. One example is presented. Calibration patterns are emerging, which give a promise of predictive capability. |
Year | DOI | Venue |
|---|---|---|
2009 | 10.1016/j.cageo.2007.12.003 | Computers & Geosciences |
Keywords | Field | DocType |
tangential strain,input data,efficient operation,principal tangential stress,calibration pattern,explicit use,tangential stress state,efficient free surface interpolation,numerical model,landslide dynamic analysis,landslide runout,input parameter,mathematical models,continuum mechanics,dynamic analysis,landslides,hazards,runout,algorithms,rheology,three dimensional,mass movement,risk assessment,free surface | Kernel (linear algebra),Data mining,Applied mathematics,Data processing,Curvature,Centripetal force,Computer science,Hydrology,Continuum mechanics,Interpolation,Landslide,Mathematical model | Journal |
Volume | Issue | ISSN |
35 | 5 | Computers and Geosciences |
Citations | PageRank | References |
2 | 0.55 | 0 |
Authors | ||
2 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Oldrich Hungr | 1 | 2 | 0.55 |
| Scott McDougall | 2 | 2 | 0.89 |