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@ARTICLE{Garre:10168,
author = {Garre, S. and Köstel, J. and Günther, T. and Javaux, M.
and Vanderborght, J. and Vereecken, H.},
title = {{C}omparison of heterogeneous transport processes observed
with electrical resistivity tomography in two soils},
journal = {Vadose zone journal},
volume = {9},
issn = {1539-1663},
address = {Madison, Wis.},
publisher = {SSSA},
reportid = {PreJuSER-10168},
pages = {336 - 349},
year = {2010},
note = {We would like to thank Dr. Thomas Putz and Werner
Mittelstaedt for the excavation of the lysimeters at both
field sites, as well as Ansgar Weuthen, Normen Hermes,
Ferdinand Engels, and Jurgen Holtkemeier for the technical
design and support. We thank our colleague Michel Bechtold
for fruitful discussions and help during the experiments. Th
is project was financed by the Helmholtz virtual institute
'Inverse Modelling of Terrestrial Systems' INVEST.},
abstract = {Preferential flow in soils can manifest itself in several
ways. To illustrate this, we analyzed solute transport
during a step tracer experiment in two soils expected to
differ in their governing transport processes: a loamy sand
and a silty soil. By combining electrical resistivity
tomography (ERT), time domain reflectometry, and effluent
measurements, we observed different preferential flow
phenomena. The transport process was characterized using
voxel- and column-scale effective convective-dispersive
equation (CDE) parameters, local velocities, and leaching
surfaces. At the column scale, transport in the loamy sand
was dominated by a homogenous convective-dispersive
transport behavior, but at the scale of the voxel,
preferential transport was observed. Transport in the silty
soil was considerably more heterogeneous. Preferential flow
was identified using ERT, voxel- and column-scale effective
CDE parameters, local velocities, and leaching surfaces. In
these soils, a clear influence of soil layering on solute
transport was observed.},
keywords = {J (WoSType)},
cin = {ICG-4 / JARA-ENERGY},
ddc = {550},
cid = {I:(DE-Juel1)VDB793 / $I:(DE-82)080011_20140620$},
pnm = {Terrestrische Umwelt},
pid = {G:(DE-Juel1)FUEK407},
shelfmark = {Environmental Sciences / Soil Science / Water Resources},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000277718000014},
doi = {10.2136/vzj2009.0086},
url = {https://juser.fz-juelich.de/record/10168},
}