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| Titel |
Modelling the evolution of natural cliffs subject to weathering: II. Discrete elements approach |
| VerfasserIn |
S. Utili, G. B. Crosta |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250031295
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| Zusammenfassung |
| The evolution of slopes subjected to weathering has been modelled by assuming
Mohr-Coulomb behaviour, and by using a numerical approach based on the Distinct Element
Method. According to this method, soil/rock is represented by an assembly of bonded
particles. Particle bonds are subject to progressive weakening and so the material weathering
and removal processes are modelled. Slope instability and material movement follow the
decrease of material strength in space and time with the only assumption concerning the
weathering distribution within the slope.
Firstly, the case of cliffs subject to strong erosion (weathering-limited conditions) and
uniform weathering was studied to validate the DEM approach by comparison
against analytical predictions from limit analysis (see companion abstract). Secondly,
transport-limited slopes subject to non-uniform slope weathering were studied. Results have
been compared with experimental data and other geomorphologic models from the literature
[Fisher-Lehmann, Bakker-Le Heux]. |
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