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000014525 041__ $$aeng
000014525 082__ $$a550
000014525 084__ $$2WoS$$aEnvironmental Sciences
000014525 084__ $$2WoS$$aSoil Science
000014525 084__ $$2WoS$$aWater Resources
000014525 1001_ $$0P:(DE-Juel1)VDB96822$$aGarré, S.$$b0$$uFZJ
000014525 245__ $$aThree-dimensional electrical resistivity tomography to monitor root zone water dynamics
000014525 260__ $$aMadison, Wis.$$bSSSA$$c2011
000014525 300__ $$a412 - 424
000014525 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article
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000014525 440_0 $$010301$$aVadose Zone Journal$$v10$$x1539-1663$$y1
000014525 500__ $$3POF3_Assignment on 2016-02-29
000014525 500__ $$aThe authors would like to thank Dr. Thomas Putz and Werner Mittelstaedt for the excavation of the lysimeter, as well as Ansgar Weuthen, Normen Hermes, Ferdinand Engels, and Jurgen Holtkemeier for the technical design and support. This project was financed by the Helmholtz virtual institute "Inverse Modelling of Terrestrial Systems" INVEST.
000014525 520__ $$aKnowledge of soil moisture dynamics and its spatial variability is essential to improve our understanding of root water uptake and soil moisture redistribution at the local scale and the field scale. We investigated the potential and limitations of electrical resistivity tomography (ERT) to measure three-dimensional soil moisture changes and variability in a large, undisturbed, cropped soil column and examined the interactions between soil and root system. Our analysis sustained the value of ERT as a tool to monitor and quantify water contents and water content changes in the soil, as long as the root biomass does not influence the observed resistivity. This is shown using a global water mass balance and a local validation using time domain reflectometry (TDR) probes. The observed soil moisture variability was rather high compared to values reported in the literature for bare soil. The measured water depletion rate, being the result of combined effects of root water uptake and soil water redistribution, was compared with the evaporative demand and root length densities. We observed a gradual downward movement of the maximum water depletion rate combined with periods of redistribution when there was less transpiration. Finally, the maximum root length density was observed at -70 cm depth, pointing out that root architecture can strongly depend on soil characteristics and states.
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000014525 7001_ $$0P:(DE-Juel1)129477$$aJavaux, M.$$b1$$uFZJ
000014525 7001_ $$0P:(DE-Juel1)129548$$aVanderborght, J.$$b2$$uFZJ
000014525 7001_ $$0P:(DE-HGF)0$$aPagès, L.$$b3
000014525 7001_ $$0P:(DE-Juel1)129549$$aVereecken, H.$$b4$$uFZJ
000014525 773__ $$0PERI:(DE-600)2088189-7$$a10.2136/vzj2010.0079$$gVol. 10, p. 412 - 424$$p412 - 424$$q10<412 - 424$$tVadose zone journal$$v10$$x1539-1663$$y2011
000014525 8567_ $$uhttp://dx.doi.org/10.2136/vzj2010.0079
000014525 909CO $$ooai:juser.fz-juelich.de:14525$$pVDB$$pVDB:Earth_Environment
000014525 9131_ $$0G:(DE-Juel1)FUEK407$$bErde und Umwelt$$kP24$$lTerrestrische Umwelt$$vTerrestrische Umwelt$$x0
000014525 9132_ $$0G:(DE-HGF)POF3-259H$$1G:(DE-HGF)POF3-250$$2G:(DE-HGF)POF3-200$$aDE-HGF$$bMarine, Küsten- und Polare Systeme$$lTerrestrische Umwelt$$vAddenda$$x0
000014525 9141_ $$y2011
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