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| Titel |
Physically based modeling of rainfall-triggered landslides: a case study in the Luquillo forest, Puerto Rico |
| VerfasserIn |
C. Lepore, E. Arnone, L. V. Noto, G. Sivandran, R. L. Bras |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 17, no. 9 ; Nr. 17, no. 9 (2013-09-03), S.3371-3387 |
| Datensatznummer |
250085921
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| Publikation (Nr.) |
 copernicus.org/hess-17-3371-2013.pdf |
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| Zusammenfassung |
This paper presents the development of a rainfall-triggered landslide module
within an existing physically based spatially distributed ecohydrologic
model. The model, tRIBS-VEGGIE (Triangulated Irregular Networks-based Real-time
Integrated Basin Simulator and Vegetation Generator for Interactive Evolution),
is capable of a sophisticated description of many hydrological processes; in
particular, the soil moisture dynamics are resolved at a temporal and spatial
resolution required to examine the triggering mechanisms of rainfall-induced
landslides. The validity of the tRIBS-VEGGIE model to a tropical environment
is shown with an evaluation of its performance against direct observations
made within the study area of Luquillo Forest.
The newly developed landslide module builds upon the previous version of the
tRIBS landslide component. This new module utilizes a numerical solution to
the Richards' equation (present in tRIBS-VEGGIE but not in tRIBS), which
better represents the time evolution of soil moisture transport through the
soil column. Moreover, the new landslide module utilizes an extended
formulation of the factor of safety (FS) to correctly quantify the role of
matric suction in slope stability and to account for unsaturated conditions
in the evaluation of FS.
The new modeling framework couples the capabilities of the detailed
hydrologic model to describe soil moisture dynamics with the infinite slope
model, creating a powerful tool for the assessment of rainfall-triggered
landslide risk. |
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