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@ARTICLE{Javaux:52082,
author = {Javaux, M. and Vanclooster, M.},
title = {{T}hree-dimensional structure characterisation and
transient flow modelling of a variably saturated
heterogeneous monolith},
journal = {Journal of hydrology},
volume = {327},
issn = {0022-1694},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {PreJuSER-52082},
pages = {516 - 524},
year = {2006},
note = {Record converted from VDB: 12.11.2012},
abstract = {In this study, we investigate the possibility of modelling
the transient hydraulic behaviour of an undisturbed
monolithic subsoil sample of 0.5 m(3), based on a detailed
characterisation of the soil structure. At the larger scale,
the subsoil core structure is defined by the presence of
discontinuous clay and a stone layer within a large sandy
matrix. A second structural level is characterised by the
spatial distribution of hydraulic properties in the sandy
matrix, and described using the Vogel-similarity concept
[Vogel, T., Cislerova, M., Hopmans, J.W. 1991. Porous media
with linearly variable hydraulic properties. Water Resources
Research 27, 2735-2741]. This exhaustive structural
information is subsequently implemented into a 3-D transient
and variably saturated flow model. Simulation results are
compared with experimental observations and it is showed
that the presence of a discontinuous clay and stone layer is
sensitive in predicting effective outflow. Given the fact
that no calibration is performed, we consider that the
outflow predictions are good. The results are however
disappointing for the prediction of time series of pressure
head. Moreover, the local scale Kat had to be scaled based
on structural and hydraulic monolith-scale observations.
This study points out that: (i) it would be necessary to
characterise the continuity of flow, and related parameters
such as the hydraulic conductivity at the appropriate scale,
to adequately simulate variable saturated transient flow at
that scale and (ii) a smaller spacing in the sub-sampling
would be needed to property predict local scale time series.
(c) 2006 Elsevier B.V. All rights reserved.},
keywords = {J (WoSType)},
cin = {ICG-IV},
ddc = {690},
cid = {I:(DE-Juel1)VDB50},
pnm = {Terrestrische Umwelt},
pid = {G:(DE-Juel1)FUEK407},
shelfmark = {Engineering, Civil / Geosciences, Multidisciplinary / Water
Resources},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000239870900019},
doi = {10.1016/j.jhydrol.2005.11.064},
url = {https://juser.fz-juelich.de/record/52082},
}