This paper addresses the topic of unsaturated soil stability focusing on wetting-induced instability mechanisms occurring before attainment classical shear failure. The study was conducted by simulating a series imbibition tests elementary volumes controlling water contentand net stresses. behaviour an ideal coarse-grained described combining WR2-Unsat model for solid skeleton and Van Genuchten...

We propose several numerical approaches building on upstream mobility two-point flux approximation finite volumes to solve Richards’ equation in domains made of rock-types. Our study encompasses four different schemes corresponding ways approximate the nonlinear transmission condition systems arising at interface between rocks consisting continuity pressure and fluxes, as well resolution strate...

Green roofs are a sustainable solution to manage water runoff from rain events in urban areas. Modeling hydrological phenomenon of green is challenging because the difficulties characterize soil parameters, inducing uncertainties on these parameters. Soil parameter spread model and need be analysed better understand dynamics retention. For this purpose, retention capacity represented by Van Gen...

In this paper, we propose an extension for a model of unsaturated soils developed by Van Genuchten (1980) and obtain thermos-hydric to study the influence temperature on water retention curve. A brief presentation is described using independent parameter modeling method. The proposed hydrometric makes it possible predict, from experimental measurements carried out drainage-humidification paths ...

abstract spatial variability of soils makes difficult analysis of soil water flow phenomena especially in a large area such as a watershed. using scaling methods is a solution in variability problems. the objective of this study was to investigate the effect of the non-linear variability on performance of the scaling methods of richards’ equation for modeling infiltration in a watershed. the me...

variables as input (e.g., Rawls and Brakensiek, 1985; Ahuja et al., 1989; Vereecken et al., 1989; Schaap et In many vadose zone hydrological studies, it is imperative that the al., 1998). Far fewer alternatives exist for unsaturated soil’s unsaturated hydraulic conductivity is known. Frequently, the Mualem–van Genuchten model (MVG) is used for this purpose behydraulic conductivity. Although som...

An improved particle swarm optimization (IPSO) was proposed and the intelligent algorithms such as IPSO, genetic algorithm (GA), and simulated annealing algorithm (SA) were introduced to determine parameters of Van Genuchten (VG) model for soil water retention curve (SWRC) of four typical agricultural soil textures (clay, clay loam, silt loam and sand loam) in China. For comparison, the SWRC in...