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000044312 084__ $$2WoS$$aEnvironmental Sciences
000044312 084__ $$2WoS$$aSoil Science
000044312 084__ $$2WoS$$aWater Resources
000044312 1001_ $$0P:(DE-Juel1)VDB724$$aKasteel, R.$$b0$$uFZJ
000044312 245__ $$aCharacterization of Field Tracer Transport using High-Resolution Images
000044312 260__ $$aMadison, Wis.$$bSSSA$$c2005
000044312 300__ $$a101 - 111
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000044312 440_0 $$010301$$aVadose Zone Journal$$v4$$x1539-1663$$y1
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000044312 520__ $$aFlow and transport in soils and groundwater are greatly affected by subsurface heterogeneity. We present results from infiltration experiments on four heterogeneous field plots (Orthic Luvisol) for plowed and nonplowed conditions. A2-mm pulse of Br- was applied, followed a 40-mm application of a 5 g L-1 solution of the food dye Brilliant Blue FCF (Color Index 42090) in a 6-h period. Horizontal cross sections were photographed at 0.05- and 0.10-m depth intervals, representing the A(p) and B-t horizons, respectively, either immediately or 90 d after the tracer application. High-resolution spatial maps of Brilliant Blue concentration were derived from the scanned photographs using one single calibration relationship between Brilliant Blue concentration and the color spectra for all plots and depths. No significant or consistent directional dependence was observed in the spatial correlation structure of the dye concentration for the horizontal cross sections. However, the integral scale showed a distinct depth dependency, partially caused by horizonation, with a larger value in the Ap than in the B-t horizon. Disturbed soil samples were taken at 15 locations for each cross section and analyzed for Br-. Although Brilliant Blue was retarded in the soil matrix with respect to Br-, both tracer concentrations showed an exponential decay with depth because of preferential flow enhanced by plowing. Only a small fraction of the dye was subjected to fast transport. The plot-scale information of the dye distribution revealed that our 15 sampling locations at each depth sufficient to identify the averaged plot-scale transport behavior in the soil matrix, but failed to represent the conducting preferential flow pathways.
000044312 536__ $$0G:(DE-Juel1)FUEK257$$2G:(DE-HGF)$$aChemie und Dynamik der Geo-Biosphäre$$cU01$$x0
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000044312 7001_ $$0P:(DE-HGF)0$$aBurkhardt, M.$$b1
000044312 7001_ $$0P:(DE-Juel1)VDB9324$$aGiesa, S.$$b2$$uFZJ
000044312 7001_ $$0P:(DE-Juel1)129549$$aVereecken, H.$$b3$$uFZJ
000044312 773__ $$0PERI:(DE-600)2088189-7$$gVol. 4, p. 101 - 111$$p101 - 111$$q4<101 - 111$$tVadose zone journal$$v4$$x1539-1663$$y2005
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000044312 9141_ $$y2005
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