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000052082 084__ $$2WoS$$aEngineering, Civil
000052082 084__ $$2WoS$$aGeosciences, Multidisciplinary
000052082 084__ $$2WoS$$aWater Resources
000052082 1001_ $$0P:(DE-Juel1)129477$$aJavaux, M.$$b0$$uFZJ
000052082 245__ $$aThree-dimensional structure characterisation and transient flow modelling of a variably saturated heterogeneous monolith
000052082 260__ $$aAmsterdam [u.a.]$$bElsevier$$c2006
000052082 300__ $$a516 - 524
000052082 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article
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000052082 440_0 $$03413$$aJournal of Hydrology$$v327$$x0022-1694
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000052082 520__ $$aIn this study, we investigate the possibility of modelling the transient hydraulic behaviour of an undisturbed monolithic subsoil sample of 0.5 m(3), based on a detailed characterisation of the soil structure. At the larger scale, the subsoil core structure is defined by the presence of discontinuous clay and a stone layer within a large sandy matrix. A second structural level is characterised by the spatial distribution of hydraulic properties in the sandy matrix, and described using the Vogel-similarity concept [Vogel, T., Cislerova, M., Hopmans, J.W. 1991. Porous media with linearly variable hydraulic properties. Water Resources Research 27, 2735-2741]. This exhaustive structural information is subsequently implemented into a 3-D transient and variably saturated flow model. Simulation results are compared with experimental observations and it is showed that the presence of a discontinuous clay and stone layer is sensitive in predicting effective outflow. Given the fact that no calibration is performed, we consider that the outflow predictions are good. The results are however disappointing for the prediction of time series of pressure head. Moreover, the local scale Kat had to be scaled based on structural and hydraulic monolith-scale observations. This study points out that: (i) it would be necessary to characterise the continuity of flow, and related parameters such as the hydraulic conductivity at the appropriate scale, to adequately simulate variable saturated transient flow at that scale and (ii) a smaller spacing in the sub-sampling would be needed to property predict local scale time series. (c) 2006 Elsevier B.V. All rights reserved.
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000052082 65320 $$2Author$$avadose zone
000052082 65320 $$2Author$$awater flow
000052082 65320 $$2Author$$a3-D modelling
000052082 65320 $$2Author$$astructure
000052082 65320 $$2Author$$ainfiltration
000052082 65320 $$2Author$$alysimeter study
000052082 65320 $$2Author$$atransient flow
000052082 65320 $$2Author$$ainverse modelling
000052082 7001_ $$0P:(DE-HGF)0$$aVanclooster, M.$$b1
000052082 773__ $$0PERI:(DE-600)1473173-3$$a10.1016/j.jhydrol.2005.11.064$$gVol. 327, p. 516 - 524$$p516 - 524$$q327<516 - 524$$tJournal of hydrology$$v327$$x0022-1694$$y2006
000052082 8567_ $$uhttp://dx.doi.org/10.1016/j.jhydrol.2005.11.064
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000052082 9131_ $$0G:(DE-Juel1)FUEK407$$bErde und Umwelt$$kP24$$lTerrestrische Umwelt$$vTerrestrische Umwelt$$x0
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