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@ARTICLE{Schrder:5528,
author = {Schröder, T. and Javaux, M. and Vanderborght, J. and
Körfgen, B. and Vereecken, H.},
title = {{I}mplementation of a {M}icroscopic {S}oil–{R}oot
{H}ydraulic {C}onductivity {D}rop {F}unction in a
{T}hree-{D}imensional {S}oil–{R}oot {A}rchitecture {W}ater
{T}ransfer {M}odel},
journal = {Vadose zone journal},
volume = {8},
issn = {1539-1663},
address = {Madison, Wis.},
publisher = {SSSA},
reportid = {PreJuSER-5528},
pages = {783 - 792},
year = {2009},
note = {Record converted from VDB: 12.11.2012},
abstract = {To understand how water uptake locally affects and is
affected by the soil water distribution, three-dimensional
soil models need to be developed. Nowadays, fully coupled
three-dimensional soil-root flow models at the plant
available that simulate water flow along water potential
gradients in the soil-root continuum, but the arise by the
coupling of soil and root have not been investigated
thoroughly. In a previous work, we introduced validated a
microscopic model to be used on a coarse numerical soil
grid, describing the hydraulic drop between the bulk soil
and the soil-root interface within a voxel of a
three-dimensional soil-root model. study, the impact of the
local hydraulic conductivity drop on denser root
architectures and in drier soil regions When a coarse
discretization of the soil grid is used, the local hydraulic
conductivity drop has a significant effect on the water
potential distribution at the soil-root interface and in the
xylem, especially under conditions stress where the local
soil conductivity is lower than the radial root conductivity
regulating root water uptake. consequence, plant stress
conditions will be reached earlier than if the local
conductivity drop within a soil voxel In comparison with a
fine soil discretization, the soil water potential gradient
calculated by including the conductivity drop at a coarser
discretization does not fit the soil water potential
gradient resulting from the fine discretization. Estimation
of accurate water potential gradients throughout the soil
requires a fine soil discretization.},
keywords = {J (WoSType)},
cin = {ICG-4 / JSC},
ddc = {550},
cid = {I:(DE-Juel1)VDB793 / I:(DE-Juel1)JSC-20090406},
pnm = {Terrestrische Umwelt / Scientific Computing},
pid = {G:(DE-Juel1)FUEK407 / G:(DE-Juel1)FUEK411},
shelfmark = {Environmental Sciences / Soil Science / Water Resources},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000268871900025},
doi = {10.2136/vzj2008.0116},
url = {https://juser.fz-juelich.de/record/5528},
}