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Finite Element Analysis of Two‐Dimensional Flow in Soils Considering Water Uptake by Roots: II. Field Applications
Author(s) -
Feddes Reinder A.,
Neuman Shlomo P.,
Bresler Eshel
Publication year - 1975
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1975.03615995003900020008x
Subject(s) - finite element method , infiltration (hvac) , soil water , galerkin method , evapotranspiration , water flow , water table , transient flow , geotechnical engineering , flow (mathematics) , finite volume method , environmental science , soil science , mechanics , hydrology (agriculture) , geology , groundwater , physics , meteorology , thermodynamics , ecology , geomorphology , surge , biology
Part I of this paper described a Galerkin‐type finite element approach to the simulation of two‐dimensional transient flow in saturated‐unsaturated soils considering evaporation and water uptake by roots. The purpose of Part II is to verify the numerical model against field measurements, to compare the‐results with those obtained by a finite difference technique, and to show how the finite element method can be applied to complex but realistic two‐dimensional flow situations. Two examples are given. The first concerns one‐dimensional flow and it compares numerical results with those obtained experimentally in the field from water balance studies on red cabbage ( Brassica oleracea L. ‘Rode Herfst’) grown on a clay soil in the presence of a water table. The second example describes two‐dimensional flow in a complex field situation in The Netherlands where flow takes place under cropped field conditions through five anisotropic layers. Water is supplied to the system by infiltration from two unlined ditches and is withdrawn from the system by evapotranspiration and by leakage to an underlying pumped aquifier.