Title: Comparison of Heterogeneous Transport Processes Observed with Electrical Resistivity Tomography in Two Soils
Authors: GarrĂ©, Sarah ×
Koestel, J
Guenther, T
Javaux, M
Vanderborght, Jan
Vereecken, H #
Issue Date: May-2010
Publisher: Soil sci soc amer
Series Title: Vadose zone journal vol:9 issue:2 pages:336-349
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.
ISSN: 1539-1663
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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