%0 Journal Article
%A Schröder, T.
%A Tang, L.
%A Javaux, M.
%A Vanderborght, J.
%A Körfgen, B.
%A Vereecken, H.
%T A grid refinement approach for a three-dimensional soil-root water transfer model
%J Water resources research
%V 45
%@ 0043-1397
%C Washington, DC
%I AGU
%M PreJuSER-5945
%P W10412
%D 2009
%Z Record converted from VDB: 12.11.2012
%X 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.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000270709800002
%R 10.1029/2009WR007873
%U https://juser.fz-juelich.de/record/5945