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1. Root Water Uptake Dynamics of Cichorium intybus var. sativum Under Water-Limited Conditions

Author:
Javaux, M.,   et al.   ; Vandoorne, B.; Beff, L.; Lutts, S.;     Show all 4 Authors
Source:
Vadose zone journal 2012 v.11 no.3 pp. -
ISSN:
1539-1663
Subject:
Cichorium intybus; chicory; climate change; developmental stages; drought; drying; inulin; irrigation; metabolism; models; plant development; roots; soil; transpiration; vadose zone; water stress; water uptake; Western European region
Abstract:
... Chicory (Cichorium intybus L.) is a cash crop cultivated in Western Europe for inulin production. Due to actual and future climate changes, this plant could be exposed to severe water stress at the end of its growing period, leading to a decrease of its yield. The aim of this work was to investigate the chicory root water uptake dynamics and the plant ability to compensate a lack of water in the u ...
DOI:
10.2136/vzj2012.0005

2. Interweaving Monitoring Activities and Model Development towards Enhancing Knowledge of the Soil–Plant–Atmosphere Continuum

Author:
Javaux, M.,   et al.   ; Romano, N.; Angulo-Jaramillo, R.; Ploeg, M.J. van der;     Show all 4 Authors
Source:
Vadose zone journal 2012 v.11 no.3 pp. -
ISSN:
1539-1663
Subject:
agronomy; equations; geophysics; mechanistic models; monitoring; plant physiology; tensiometers; tomography; vadose zone
Abstract:
... The study of water pathways from the soil to the atmosphere through plants—the so-called soil–plant–atmosphere continuum (SPAC)—has always been central to agronomy, hydrology, plant physiology, and other disciplines, using a wide range of approaches and tools. In recent years, we have been witnessing a rapid expansion of interweaving monitoring activities and model development related to SPAC in c ...
DOI:
10.2136/vzj2012.0122

3. Scale-dependency of the hydraulic properties of a variably saturated heterogeneous sandy subsoil

Author:
Javaux, M.,   et al.   ; Vanclooster, M.;     Show all 2 Author
Source:
Journal of hydrology 2006 v.327 no.3-4 pp. 376-388
ISSN:
0022-1694
Subject:
mathematical models; sandy soils; saturated conditions; subsoil; unsaturated hydraulic conductivity; soil heterogeneity; infiltration (hydrology); hysteresis; spatial variation; sand; vadose zone; soil water characteristic; soil water movement; Belgium
Abstract:
... The effective hydraulic behaviour of heterogeneous sand was experimentally investigated at two scales under transient flow upper boundary conditions. At the monoliths-scale, one-dimensional inverse modelling was performed from a transient infiltration experiment by implementing in the objective function the outflow and pressure head time series at four depths. Notwithstanding the important heterog ...
DOI:
10.1016/j.jhydrol.2005.11.040

4. Three-dimensional structure characterisation and transient flow modelling of a variably saturated heterogeneous monolith

Author:
Javaux, M.,   et al.   ; Vanclooster, M.;     Show all 2 Author
Source:
Journal of hydrology 2006 v.327 no.3-4 pp. 516-524
ISSN:
0022-1694
Subject:
simulation models; subsoil; rocks; infiltration (hydrology); lysimeters; clay; soil structure; sand; vadose zone; hydraulic conductivity; soil water movement; Belgium
Abstract:
... In this study, we investigate the possibility of modelling the transient hydraulic behaviour of an undisturbed monolithic subsoil sample of 0.5 m3, 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 th ...
DOI:
10.1016/j.jhydrol.2005.11.064

5. How efficient are one-dimensional models to reproduce the hydrodynamic behavior of structured soils subjected to multi-step outflow experiments

Author:
Javaux, M.,   et al.   ; Laloy, E.; Weynants, M.; Bielders, C.L.; Vanclooster, M.;     Show all 5 Authors
Source:
Journal of hydrology 2010 v.393 no.1-2 pp. 37-52
ISSN:
0022-1694
Subject:
algorithms; hydrodynamics; macropores; models; preferential flow; soil heterogeneity; soil sampling; soil types; water flow
Abstract:
... In this paper we investigate numerically the three following questions: (1) Do MSO data show the impact of soil structure on water flow? (2) If so, to what extent are the common one-dimensional hydraulic models able to apprehend any preferential flow features? and (3) What are the predictive capabilities of these models parameterized with MSO data? A Bayesian framework was used to infer the hydrau ...
DOI:
10.1016/j.jhydrol.2010.02.017

6. Comment on "Root Water Extraction and Limiting Soil Hydraulic Conditions Estimated by Numerical Simulation"

Author:
Javaux, M.,   et al.   ; Schroder, T.; Vanderborght, J.; Vereecken, H.;     Show all 4 Authors
Source:
Vadose zone journal 2007 v.6 no.3 pp. 524-526
ISSN:
1539-1663
Subject:
simulation models; soil water content; equations; transpiration; water uptake; roots; soil water movement
DOI:
10.2136/vzj2007.0036

7. In situ long-term chloride transport through a layered, nonsaturated subsoil. 1. Data set, interpolation methodology, and results

Author:
Javaux, M.,   et al.   ; Vanclooster, M.;     Show all 2 Author
Source:
Vadose zone journal 2004 v.3 no.4 pp. -
ISSN:
1539-1663
Subject:
lakes; subsoil; lacustrine sediments; stochastic processes; unsaturated conditions; vadose zone; chlorides; leaching; infiltration (hydrology); lacustrine soils; sand; surface water; Belgium
Abstract:
... A long-term data set of Cl- concentrations in an artificial, leaking lake and in the underlying vadose zone was used to assess in situ vertical transport through a tertiary sandy deposit. Since the temporal resolution of the observed Cl- concentrations in the lake was relatively poor, a method was implemented to assess uncertainty on process identification as caused by a poor definition of the bou ...

8. In situ long-term chloride transport through a layered, nonsaturated subsoil. 2. Effect of layering on solute transport processes

Author:
Javaux, M.,   et al.   ; Vanclooster, M.;     Show all 2 Author
Source:
Vadose zone journal 2004 v.3 no.4 pp. -
ISSN:
1539-1663
Subject:
simulation models; lakes; subsoil; lacustrine sediments; stochastic processes; unsaturated conditions; vadose zone; chlorides; leaching; infiltration (hydrology); lacustrine soils; layered soils; sand; surface water; Belgium
Abstract:
... We analyze observed Cl- transport during a large-scale in situ unsaturated infiltration experiment in terms of the observation scale of the transport process and the physical stratification of the Tertiary sedimentary flow domain. By comparing piston flow and local velocity profiles, we show that velocity variations cannot be explained by water content changes alone. We also demonstrate that by co ...

9. Interpretation of Dye Transport in a Macroscopically Heterogeneous, Unsaturated Subsoil with a One-Dimensional Model

Author:
Javaux, M.,   et al.   ; Kasteel, R.; Vanderborght, J.; Vanclooster, M.;     Show all 4 Authors
Source:
Vadose zone journal 2006 v.5 no.2 pp. 529-538
ISSN:
1539-1663
Subject:
simulation models; sandy soils; subsoil; unsaturated conditions; sorption; dispersibility; dyes; soil transport processes; sand; hydrologic models
Abstract:
... The objective of this study was to identify physical and chemical processes affecting Brilliant Blue (BB) transport in an unsaturated, macroscopically heterogeneous subsoil. We performed a BB leaching experiment in a 1-m-long undisturbed sandy monolith with a 10-cm-thick discontinuous clay layer 0.2 m below the surface. Two-dimensional BB concentration distributions were derived from image analysi ...
DOI:
10.2136/vzj2005.0085

10. Using TDR and inverse modeling to characterize solute transport in a layered agricultural volcanic soil

Author:
Javaux, M.,   et al.   ; Ritter, A.; Munoz-Carpena, R.; Regalado, C.M.; Vanclooster, M.;     Show all 5 Authors
Source:
Vadose zone journal 2005 v.4 no.2 pp. -
ISSN:
1539-1663
Subject:
agricultural soils; simulation models; volcanic soils; iron oxyhydroxides; time domain reflectometry; oxide, hydroxide, and oxyhydroxide minerals; solutes; soil transport processes; layered soils; bromides; vadose zone
Abstract:
... Volcanic soils exhibit particular physical-chemical properties (i.e., strong and stable natural aggregation and high content of variable-charge minerals) that may influence solute transport. To determine if such techniques like TDR and inverse modeling are useful for analyzing solute transport in volcanic soils, we studied the governing transport processes by means of a miscible displacement exper ...

11. A set of analytical benchmarks to test numerical models of flow and transport in soils

Author:
Javaux, M.,   et al.   ; Vanderborght, J.; Kasteel, R.; Herbst, M.; Thiery, D.; Vanclooster, M.; Mouvet, C.; Vereecken, H.;     Show all 8 Authors
Source:
Vadose zone journal 2005 v.4 no.1 pp. -
ISSN:
1539-1663
Subject:
vadose zone; soil water movement; unsaturated flow; mathematical models; hydrologic models; equations
Abstract:
... Accurate model predictions of water flow and solute transport in unsaturated soils require a correct representation of relevant mechanisms in a mathematical model, as well as correct solutions of the mathematical equations. Because of the complexity of boundary conditions and the nonlinearity of the processes considered, general solutions of the mathematical equations rely on numerical approximati ...