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| Titel |
A GIS-based numerical model for simulating the kinematics of mud and debris flows over complex terrain |
| VerfasserIn |
S. Beguería, Th. W. J. Asch, J.-P. Malet, S. Gröndahl |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 9, no. 6 ; Nr. 9, no. 6 (2009-11-17), S.1897-1909 |
| Datensatznummer |
250007058
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| Publikation (Nr.) |
 copernicus.org/nhess-9-1897-2009.pdf |
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| Zusammenfassung |
| This article presents MassMov2D, a two-dimensional model of mud and debris
flow dynamics over complex topography, based on a numerical integration of
the depth-averaged motion equations using a shallow water approximation. The
core part of the model was implemented using the GIS scripting language
PCRaster. This environment provides visualization of the results through map
animations and time series, and a user-friendly interface. The constitutive
equations and the numerical solution adopted in MassMov2D are presented in
this article. The model was applied to two field case studies of mud flows on
torrential alluvial fans, one in the Austrian Tyrol (Wartschenbach torrent)
and the other in the French Alps (Faucon torrent). Existing data on the
debris flow volume, input discharge and deposits were used to back-analyze
those events and estimate the values of the leading parameters. The results
were compared with modeling codes used by other authors for the same case
studies. The results obtained with MassMov2D matched well with the observed
debris flow deposits, and are in agreement with those obtained using
alternative codes. |
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