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Title: A grid refinement approach for a three-dimensional soil-root water transfer model
Authors: Schroeder, T ×
Tang, L
Javaux, M
Vanderborght, Jan
Koerfgen, B
Vereecken, H #
Issue Date: Oct-2009
Publisher: Amer geophysical union
Series Title: Water resources research vol:45 issue:10 pages:W10412
Abstract: Three dimensional soil-root water transfer models require a fine soil and root discretization in order to obtain accurate results. This goes along with a considerable computational effort. One way of reducing the computational effort is the usage of grid refinement techniques. With such techniques irregular grids are obtained that combine the accuracy of a fine grid resolution with a considerable reduction in computational costs. As a consequence of plant transpiration roots take up water and large soil water potential gradients around roots are created. Especially in these regions a fine soil discretization is needed. The root spatial distribution can therefore be used for refinement of the soil grid, a priori. Simulations show that the accuracy is indeed maintained for a priori refined grids but with reduced computational costs as compared to regular fine grids. Comparison with a well recognized a posteriori error estimate strengthen these results.
ISSN: 0043-1397
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Division Soil and Water Management
× corresponding author
# (joint) last author

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