1. Groundwater modeling for the analysis of active slow-moving landslides
- Author
-
Cascini, Leonardo, Calvello, Michele, and Grimaldi, Giuseppe M.
- Subjects
Landslides -- United States ,Landslides -- Environmental aspects ,Clay -- Mechanical properties ,Soil mechanics -- Research ,Groundwater flow -- Models ,Earth sciences ,Engineering and manufacturing industries ,Science and technology - Abstract
Active slow-moving landslides in clayey soils exhibit continuous movements generally controlled both in the accelerating and decelerating phases by the pore-water pressure regime that, in turn, is strictly correlated to the net rainfall regime. The paper stresses the importance of a reliable groundwater model to predict these types of movements. To this aim a procedure is proposed to define the transient groundwater regime in the slope on the basis of recorded rainfall and monitoring data; the model is then used to derive the time-dependent shear strength along the main slip surfaces. The displacements at selected points along the slip surface are computed using a phenomenological (i.e., empirical) relationship between the local factor of safety and the displacement rate at those points. The procedure is employed for the analysis of a well-documented case history: the Porta Cassia landslide (central Italy). DOI: 10.1061/(ASCE)GT.1943-5606.0000323 CE Database subject headings: Landslides; Groundwater models; Displacement. Author keywords: Active slow-moving landslides; Groundwater modeling; Landslides displacement scenarios.
- Published
- 2010