نتایج جستجو برای: mualem
تعداد نتایج: 101 فیلتر نتایج به سال:
In this study, the simulation results of four vertical flow wetland systems using the HYDRUS Wetland Module are presented. The four wetland systems comprise three single-stage pilot scale systems and one full-scale two-stage system. The main difference between these systems is the filter media used, referred to as fine media, i.e., sand with a grain size distribution 0.063–4 mm, or coarse media...
This paper presents the results of nonlinear numerical simulations carried out to analyze rainwater infiltration through a road embankment structure using the finite element method (FEM) technique. The analysis of this paper includes a simplification of a crosssectional road embankment located in Santander (Northern Spain) and considers different realistic hydraulic material parameters, accordi...
P. Adamson, I. Anghel, G. Barr, M. Bishai, A. Blake, G. J. Bock, D. Bogert, S. V. Cao, S. Childress, J. A. B. Coelho, L. Corwin, D. Cronin-Hennessy, J. K. de Jong, A. V. Devan, N. E. Devenish, M.V. Diwan, C. O. Escobar, J. J. Evans, E. Falk, G. J. Feldman, M. V. Frohne, H. R. Gallagher, R. A. Gomes, M. C. Goodman, P. Gouffon, N. Graf, R. Gran, K. Grzelak, A. Habig, J. Hartnell, R. Hatcher, A. H...
Closed-form expressions of the hydraulic conductivity function for linearly superposed subretention (multimodal) functions were derived arbitrary sets Brooks and Corey (BC), van Genuchten (VG), Kosugi (KO) water retention models. The generalized Mualem model was evaluated using mathematical approach Priesack Durner. Three types modification to multimodel also proposed. Firstly, equations can be...
This paper aimed to study the soil–water characteristics and stability evolution law of rainfall-induced landslide. Taking two landslide events in Siwan village as an example, formation conditions disaster were analyzed. Additionally, deformation destruction mechanisms landslides discussed in-depth. The hydraulic conductivity analyzed based on TRIM experiment results. Geo-Studio numerical softw...
Relatively small changes in the shape of the soil water retention curve near saturation can signi®cantly aect the results of numerical simulations of variably saturated ̄ow, including the performance of the numerical scheme itself in terms of stability and rate of convergence. In this paper, we use a modi®ed form of the van Genuchten±Mualem (VGM) soil hydraulic functions to account for a very ...
P. Adamson, G. Barr, M. Bishai, A. Blake, G. J. Bock, D. Bogert, S. V. Cao, D. Cherdack, S. Childress, J. A. B. Coelho, L. Corwin, D. Cronin-Hennessy, J. K. de Jong, A. V. Devan, N. E. Devenish, M. V. Diwan, C. O. Escobar, J. J. Evans, E. Falk, G. J. Feldman, M. V. Frohne, H. R. Gallagher, R. A. Gomes, M. C. Goodman, P. Gouffon, N. Graf, R. Gran, K. Grzelak, A. Habig, J. Hartnell, R. Hatcher, A...
Abstract. Sorptivity is a parameter of primary importance in the study unsaturated flow soils. This hydraulic required to model water infiltration into vertical soil profiles. can be directly estimated from functions (water retention and conductivity curves), using integral formulation Parlange (1975). However, calculating sorptivity this manner requires prior determination diffusivity its nume...
Lateral subsurface flow (LSF) is a phenomenon frequently occurring in the field induced by local water saturation along horizon boundaries under nonequilibrium conditions. However, observations of LSF undisturbed soils controlled irrigation laboratory are limited but needed for model improvement, prediction, and quantification LSF. We present method extracting an soil monolith boundary introduc...
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