Print Email Facebook Twitter A model of hydrological and mechanical feedbacks of preferential fissure flow in a slow-moving landslide Title A model of hydrological and mechanical feedbacks of preferential fissure flow in a slow-moving landslide Author Krzeminska, D.M. Bogaard, T.A. Malet, J.P. Van Beek, L.P.H. Faculty Civil Engineering and Geosciences Department Water Management Date 2012-12-31 Abstract 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 pf 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 20 the fissure network and applied the model to the hydrologically controlled Super-Sauze landslide (South French Alps). To reference this document use: http://resolver.tudelft.nl/uuid:12b49c1c-b8ed-4513-8def-ecbae40d87c5 ISSN 1812-2108 Source Hydrology and Earth System Sciences Discussions, (9)2012 Part of collection Institutional Repository Document type journal article Rights (c) 2012 Krzeminska, D.M., Bogaard, T.A., Malet, J.P., Van Beek, L.P.H. Files PDF 286505.pdf 4.1 MB Close viewer /islandora/object/uuid:12b49c1c-b8ed-4513-8def-ecbae40d87c5/datastream/OBJ/view