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000005527 0247_ $$2DOI$$a10.2136/vzj2008.0027
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000005527 041__ $$aeng
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000005527 084__ $$2WoS$$aEnvironmental Sciences
000005527 084__ $$2WoS$$aSoil Science
000005527 084__ $$2WoS$$aWater Resources
000005527 1001_ $$0P:(DE-Juel1)VDB61841$$aKöstel, J.$$b0$$uFZJ
000005527 245__ $$aNoninvasive 3-D Transport Characterization in a Sandy Soil Using ERT: 1. Investigating the Validity of ERT-derived Transport Parameters
000005527 260__ $$aMadison, Wis.$$bSSSA$$c2009
000005527 300__ $$a711 - 722
000005527 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article
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000005527 440_0 $$010301$$aVadose Zone Journal$$v8$$x1539-1663$$y3
000005527 500__ $$aRecord converted from VDB: 12.11.2012
000005527 520__ $$aWe used time-lapse electrical resistivity tomography (ERT) and time-domain reflectometry (TDR) probes to noninvasively capture three-dimensional solute transport during four tracer experiments under different steady-state irrigation rates in a large unsaturated undisturbed soil column (140 cm length and 116 cm inner diameter). The transport was characterized by means of apparent convection-dispersion parameters that were derived from breakthrough curves (BTCs) at different lateral scales: the ERT voxel scale, the sampling volume of TDR, and the cross-section of the column. We validated the ERT-derived data by means of mass balance, TDR probes, and the effluent BTC. We observed an excellent mass recovery by ERT. The ERT-derived transport velocities exhibited minimal bias and high precision at the scale of the TDR measurements. On average the ERT-derived column-scale transport velocities were also not biased; however, the spatial variability of the voxel-scale velocities within the column's cross-sections underestimated the true velocity variability. In contrast to the transport velocities, the ERT-derived dispersivities exhibited a large bias and low precision and were sensitive to temporal smoothing. Unlike previous studies, we did not find evidence that the ERT-derived voxel-scale dispersivities increase with decreasing ERT sensitivity. Although ERT provided unprecedented information about transport processes, resolution and uncertainty analyses remain important issues requiring further investigation.
000005527 536__ $$0G:(DE-Juel1)FUEK407$$2G:(DE-HGF)$$aTerrestrische Umwelt$$cP24$$x0
000005527 588__ $$aDataset connected to Web of Science
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000005527 7001_ $$0P:(DE-Juel1)129548$$aVanderborght, J.$$b1$$uFZJ
000005527 7001_ $$0P:(DE-Juel1)129477$$aJavaux, M.$$b2$$uFZJ
000005527 7001_ $$0P:(DE-HGF)0$$aKemna, A.$$b3
000005527 7001_ $$0P:(DE-HGF)0$$aBinley, A.$$b4
000005527 7001_ $$0P:(DE-Juel1)129549$$aVereecken, H.$$b5$$uFZJ
000005527 773__ $$0PERI:(DE-600)2088189-7$$a10.2136/vzj2008.0027$$gVol. 8, p. 711 - 722$$p711 - 722$$q8<711 - 722$$tVadose zone journal$$v8$$x1539-1663$$y2009
000005527 8567_ $$uhttp://dx.doi.org/10.2136/vzj2008.0027
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000005527 9131_ $$0G:(DE-Juel1)FUEK407$$bErde und Umwelt$$kP24$$lTerrestrische Umwelt$$vTerrestrische Umwelt$$x0
000005527 9141_ $$y2009
000005527 915__ $$0StatID:(DE-HGF)0010$$aJCR/ISI refereed
000005527 9201_ $$0I:(DE-Juel1)VDB793$$d31.10.2010$$gICG$$kICG-4$$lAgrosphäre$$x1
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