 |
| Titel |
Modelling shallow debris flows of the Coulomb-mixture type over temporally varying topography |
| VerfasserIn |
Y. C. Tai, C. Y. Kuo |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1561-8633
|
| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 12, no. 2 ; Nr. 12, no. 2 (2012-02-06), S.269-280 |
| Datensatznummer |
250010495
|
| Publikation (Nr.) |
 copernicus.org/nhess-12-269-2012.pdf |
|
|
|
|
|
| Zusammenfassung |
| We propose a saturated binary mixture model for debris flows of the
Coulomb-mixture type over temporally varying topography, where the
effects of erosion and deposition are considered. Due to the
deposition or erosion processes, the interface between the moving
material and the stagnant base is a non-material singular surface.
The motion of this singular surface is determined by the mass
exchange between the flowing layer and the ground. The ratio of the
relative velocity between the two constituents to the velocity of
the solid phase is assumed to be small, so that the governing
equations can be reduced to a system of the quasi-single-phase type.
A shock-capturing numerical scheme is implemented to solve the
derived equation system. The deposition shapes of a finite mass
sliding down an inclined planary chute are investigated for a range
of mixture ratios. The geometric evolution of the deposition is
presented, which allows the possibility of mimicking the development
of levee deposition. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|