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000010168 0247_ $$2DOI$$a10.2136/vzj2009.0086
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000010168 041__ $$aeng
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000010168 084__ $$2WoS$$aEnvironmental Sciences
000010168 084__ $$2WoS$$aSoil Science
000010168 084__ $$2WoS$$aWater Resources
000010168 1001_ $$0P:(DE-Juel1)VDB85509$$aGarre, S.$$b0$$uFZJ
000010168 245__ $$aComparison of heterogeneous transport processes observed with electrical resistivity tomography in two soils
000010168 260__ $$aMadison, Wis.$$bSSSA$$c2010
000010168 300__ $$a336 - 349
000010168 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article
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000010168 440_0 $$010301$$aVadose Zone Journal$$v9$$x1539-1663$$y2
000010168 500__ $$aWe would like to thank Dr. Thomas Putz and Werner Mittelstaedt for the excavation of the lysimeters at both field sites, as well as Ansgar Weuthen, Normen Hermes, Ferdinand Engels, and Jurgen Holtkemeier for the technical design and support. We thank our colleague Michel Bechtold for fruitful discussions and help during the experiments. Th is project was financed by the Helmholtz virtual institute 'Inverse Modelling of Terrestrial Systems' INVEST.
000010168 520__ $$aPreferential 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.
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000010168 7001_ $$0P:(DE-Juel1)VDB61841$$aKöstel, J.$$b1$$uFZJ
000010168 7001_ $$0P:(DE-HGF)0$$aGünther, T.$$b2
000010168 7001_ $$0P:(DE-Juel1)129477$$aJavaux, M.$$b3$$uFZJ
000010168 7001_ $$0P:(DE-Juel1)129548$$aVanderborght, J.$$b4$$uFZJ
000010168 7001_ $$0P:(DE-Juel1)129549$$aVereecken, H.$$b5$$uFZJ
000010168 773__ $$0PERI:(DE-600)2088189-7$$a10.2136/vzj2009.0086$$gVol. 9, p. 336 - 349$$p336 - 349$$q9<336 - 349$$tVadose zone journal$$v9$$x1539-1663$$y2010
000010168 8567_ $$uhttp://dx.doi.org/10.2136/vzj2009.0086
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000010168 9131_ $$0G:(DE-Juel1)FUEK407$$bErde und Umwelt$$kP24$$lTerrestrische Umwelt$$vTerrestrische Umwelt$$x0
000010168 9141_ $$y2010
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