Abstract: Extreme rainfall events are the major driver of landslide occurrences in mountainous and steep terrain regions around the world. Subsurface hydrology has a dominant role on the initiation of rainfall-induced landslides, since changes in the soil water content affect significantly the soil shear strength. Rainfall infiltration produces an increase of soil water potential, which is followed by a rapid drop in apparent cohesion.
Tag Archive for soil hydraulic hysteresis
An introductory presentation for my PhD research covering the hydrological modelling of shallow landslides, subsurface hydrology, unsaturated soil mechanics, Ground Penetration Radars and some experimental data from a field campaign that I conducted.
Abstract: Landslides of any type, and particularly soil slips, pose a great threat in mountainous and steep terrain environments. One of the major triggering mechanisms for slope failures in shallow soils is the build-up of soil pore water pressure resulting in a decrease of effective stress. However, infiltration may have other effects both before and after slope failure. Read more
The role of subsurface topography and its implications on the water regime in the Urseren Valley, Switzerland
Abstract: To improve the understanding and the modelling of soil water regimes in alpine areas it is essential to know not only the number and the properties of the soil layers, but also their spatial distribution. One common assumption used in many simulations in the literature is that that the soil layers and the bedrock are parallel to the surface, which sometimes diverges significantly from the reality. Read more
An Object-oriented computational framework for the simulation of variably saturated flow in soils, using a reduced complexity model
Abstract: A simple and efficient computational modelling framework is presented for the simulation of variably saturated flows in porous media, which is not based on a conventional numerical solution of the Richards’ equation. The computational domain is discretised with a regular grid and simple rules govern the flow dynamics. Read more