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| Titel |
A model of hydrological and mechanical feedbacks of preferential fissure flow in a slow-moving landslide |
| VerfasserIn |
D. M. Krzeminska, T. A. Bogaard, J.-P. Malet, L. P. H. Beek |
| 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. 3 ; Nr. 17, no. 3 (2013-03-05), S.947-959 |
| Datensatznummer |
250018815
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| Publikation (Nr.) |
 copernicus.org/hess-17-947-2013.pdf |
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| Zusammenfassung |
The importance of hydrological processes for landslide activity is generally
accepted. However, the relationship between precipitation, hydrological
responses and movement is not straightforward. Groundwater recharge is
mostly controlled by the hydrological material properties and the structure
(e.g., layering, preferential flow paths such as fissures) of the unsaturated
zone. In slow-moving landslides, differential displacements caused by the
bedrock structure complicate the hydrological regime due to continuous
opening and closing of the fissures, creating temporary preferential flow
paths systems for infiltration and groundwater drainage. The consecutive
opening and closing of fissure aperture control the formation of a critical
pore water pressure by creating dynamic preferential flow paths for
infiltration and groundwater drainage. This interaction may explain the
seasonal nature of the slow-moving landslide activity, including the often
observed shifts and delays in hydrological responses when compared to
timing, intensity and duration of precipitation.
The main objective of this study is to model the influence of fissures on
the hydrological dynamics of slow-moving landslide and the dynamic feedbacks
between fissures, hydrology and slope stability. For this we adapt the
spatially distributed hydrological and slope stability model
(STARWARS) to account for geotechnical and hydrological feedbacks,
linking between hydrological response of the landside and the dynamics of
the fissure network and applied the model to the hydrologically controlled
Super-Sauze landslide (South French Alps). |
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