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Published online 16 November 2005
Published in Vadose Zone J 4:1191-1200 (2005)
DOI: 10.2136/vzj2005.0007
© 2005 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Right arrow Hydraulic Conductivity
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Comparison of Equivalent Conductivities for Numerical Simulation of One-Dimensional Unsaturated Flow

Benjamin Belfort and François Lehmann*

Institut de Mécanique des Fluides et des Solides, UMR 7507 ULP-CNRS, 2 rue Boussingault, Strasbourg, France


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  		Fig. 1. Mixed hybrid finite element (MHFE) and finite difference (FD) discretizations of a layered soil profile.

 


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  		Fig. 2. Calculated pressure head distribution after 6 h of infiltration as obtained with the different averages for the mixed hybrid finite element (MHFE) approach and a fine-grid solution.

 


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  		Fig. 3. Calculated pressure head errors (PE) as a function of CPU time for different finite difference (FD) (a) and mixed hybrid finite element (MHFE) (b) schemes.

 


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  		Fig. 4. Calculated velocity errors vs. depth for the different finite difference (FD) (a) and mixed hybrid finite element (MHFE) (b) schemes.

 


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  		Fig. 5. Calculated water content distributions in the layered profile after 3 d of infiltration.

 


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  		Fig. 6. Flux error, qcal – qref, vs. time, t, as obtained with the various finite difference (FD) and mixed hybrid finite element (MHFE) schemes at the four layer interfaces located at (a) 20 cm, (b) 40 cm, (c) 60 cm, and (d) 80 cm.

 




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