PubAg

Main content area

You searched for: Author "Javaux, M." Remove constraint Author: "Javaux, M."
Start Over

Search

25  Search Results

« Previous | 1 - 20 of 25 |
Number of results to display per page

Search Results

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
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. 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

3. 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

4. Long term intermittent flooding stress affects plant growth and inulin synthesis of Cichorium intybus (var. sativum)

Author:
Javaux, M.,   et al.   ; Vandoorne, B.; Descamps, C.; Mathieu, A. S.; Van den Ende, W.; Vergauwen, R.; Lutts, S.;     Show all 7 Authors
Source:
Plant and soil 2014 v.376 no.1-2 pp. 291-305
ISSN:
0032-079X
Subject:
Cichorium intybus; beta-fructofuranosidase; environmental factors; fructose; glucose; inulin; leaves; organic acids and salts; photosystem II; plant stress; polymerization; reducing sugars; root growth; roots; stomatal movement; sucrose; sucrose synthase; sucrose-phosphate synthase
Abstract:
... BACKGROUND AND AIMS: Flooding stress is known to affect root growth and sugar metabolism in plants, but data are crucially missing for Cichorium intybus which stores inulin in its tap root. The aim of the present study was to quantify the impact of recurrent episodes of flooding stress on plant growth, water status, photosynthesis and sugar metabolism in relation to inulin synthesis and accumulati ...
DOI:
10.1007/s11104-013-1933-4

5. Impact of tillage on solute transport in a loamy soil from leaching experiments

Author:
Javaux, M.,   et al.   ; Besson, A.; Bielders, C.L.; Vanclooster, M.;     Show all 4 Authors
Source:
Soil & tillage research 2011 v.112 no.1 pp. 47-57
ISSN:
0167-1987
Subject:
harrowing; leaching; loam soils; lysimeters; macropores; moldboard plows; solutes; space and time; water flow
Abstract:
... Soil tillage practices can affect water flow and solute transport processes dynamically in space and in time. However, the relationship between tillage practices and flow and transport in soils is not yet well understood. Within this paper, we analyze the short term impact of the conversion from conventional mouldboard ploughing (CT) to reduced disc harrowing (RT) on the solute transport process w ...
DOI:
10.1016/j.still.2010.11.001

6. Three-Dimensional Electrical Resistivity Tomography to Monitor Root Zone Water Dynamics

Author:
Javaux, M.,   et al.   ; Garré, S.; Vanderborght, J.; Pagès, L.; Vereecken, H.;     Show all 5 Authors
Source:
Vadose zone journal 2011 v.10 no.1 pp. 412-424
ISSN:
1539-1663
Subject:
biomass; electrical resistance; rhizosphere; root systems; soil water; time domain reflectometry; tomography; transpiration; vadose zone; water content; water uptake
Abstract:
... Knowledge 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 ...
DOI:
10.2136/vzj2010.0079

7. Revisiting Vereecken Pedotransfer Functions: Introducing a Closed-Form Hydraulic Model

Author:
Javaux, M.,   et al.   ; Weynants, M.; Vereecken, H.;     Show all 3 Authors
Source:
Vadose zone journal 2009 v.8 no.1 pp. 86-95
ISSN:
1539-1663
Subject:
pedotransfer functions; mathematical models; unsaturated hydraulic conductivity; algorithms; vadose zone; Belgium
Abstract:
... We revisited the Vereecken database, which has been used to derive pedotransfer functions (PTFs) to estimate the soil hydraulic parameters of Belgian soils. We developed new PTFs based on the Mualem–van Genuchten model, constraining m = 1 − 1/n and using fewer parameters. The goodness-of-fit was similar to the one originally obtained by Vereecken. We used a one-step procedure that allows direct qu ...
DOI:
10.2136/vzj2008.0062

8. 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
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 ...

9. 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
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 ...

10. 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

11. 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
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

12. Scale- and Rate-Dependent Solute Transport within an Unsaturated Sandy Monolith

Author:
Javaux, M.,   et al.   ; Vanclooster, M.;     Show all 2 Author
Source:
Soil Science Society of America journal 2003 v.67 no.5 pp. 1334-1343
ISSN:
1435-0661
Subject:
aquifers; leaching; mixing; models; soil; solutes; streams; time domain reflectometry
Abstract:
... Solute transport in unsaturated soil is a scale- and flow rate-dependent process, and high quality experimental studies are needed to introduce scaling relationships in the governing flow and transport models. Within this paper, we present an experimental study to characterize the solute transport for an unsaturated and undisturbed subsoil monolith sampled in a sandy aquifer. Leaching experiments ...
DOI:
10.2136/sssaj2003.1334

13. Electrical Resistivity in a Loamy Soil: Identification of the Appropriate Pedo-Electrical Model

Author:
Javaux, M.,   et al.   ; Laloy, E.; Vanclooster, M.; Roisin, C.; Bielders, C. L.;     Show all 5 Authors
Source:
Vadose zone journal 2011 v.10 no.3 pp. 1023-1033
ISSN:
1539-1663
Subject:
bulk density; electrical resistance; loam soils; models; parameter uncertainty; pedotransfer functions; porosity; prediction; silt loam soils; soil density; soil heterogeneity; soil water; soil water content; tomography; vadose zone; water content
Abstract:
... Electrical resistance tomography (ERT) can be used for the noninvasive characterization of soil moisture and soil structural heterogeneity. Any attempt to relate electrical resistivity measurements to soil moisture content or soil bulk density, however, must rely on a “pedo-electrical” function, i.e., a conductivity model for soils. This study aimed to test five pedo-electrical models for their ab ...
DOI:
10.2136/vzj2010.0095

14. Water stress drastically reduces root growth and inulin yield in Cichorium intybus (var. sativum) independently of photosynthesis

Author:
Javaux, M.,   et al.   ; Vandoorne, B.; Mathieu, A.-S.; Van den Ende, W.; Vergauwen, R.; Périlleux, C.; Lutts, S.;     Show all 7 Authors
Source:
Journal of experimental botany 2012 v.63 no.12 pp. 4359-4373
ISSN:
0022-0957
Subject:
Cichorium intybus; chicory; inulin; leaf area; leaves; osmotic pressure; photosynthesis; pigments; polymerization; root growth; roots; stomatal conductance; sucrose-phosphate synthase; sugars; water stress; water use efficiency; Western European region
Abstract:
... Root chicory (Cichorium intybus var. sativum) is a cash crop cultivated for inulin production in Western Europe. This plant can be exposed to severe water stress during the last 3 months of its 6-month growing period. The aim of this study was to quantify the effect of a progressive decline in water availability on plant growth, photosynthesis, and sugar metabolism and to determine its impact on i ...
DOI:
10.1093/jxb/ers095
PubMed:
22577185
PubMed Central:
PMC3421980

15. Using Pedotransfer Functions to Estimate the van Genuchten-Mualem Soil Hydraulic Properties: A Review

Author:
Javaux, M.,   et al.   ; Vereecken, H.; Weynants, M.; Pachepsky, Y.; Schaap, M.G.; Genuchten, M.Th. van;     Show all 6 Authors
Source:
Vadose zone journal 2010 v.9 no.4 pp. 795
ISSN:
1539-1663
Subject:
soil hydraulic properties; pedotransfer functions; equations; mathematical models; soil water characteristic; unsaturated hydraulic conductivity; soil physical properties; soil chemical properties; soil water content; simulation models
Abstract:
... We reviewed the use of the van Genuchten-Mualem (VGM) model to parameterize soil hydraulic properties and for developing pedotransfer functions (PTFs). Analysis of literature data showed that the moisture retention characteristic (MRC) parameterization by setting shape parameters m = 1 – 1/n produced the largest deviations between fitted and measured water contents for pressure head values between ...
Handle:
10113/47233
DOI:
10.2136/vzj2010.0045

16. Comparison of Heterogeneous Transport Processes Observed with Electrical Resistivity Tomography in Two Soils

Author:
Javaux, M.,   et al.   ; Garré, S.; Koestel, J.; Günther, T.; Vanderborght, J.; Vereecken, H.;     Show all 6 Authors
Source:
Vadose zone journal 2010 v.9 no.2 pp. 336-349
ISSN:
1539-1663
Subject:
electrical resistance; equations; leaching; preferential flow; sand; silty soils; solutes; time domain reflectometry; tomography; vadose zone
Abstract:
... Preferential flow in soils can manifest itself in several ways. To illustrate this, we analyzed solute transport during a step tracer experiment in two soils expected to differ in their governing transport processes: a loamy sand and a silty soil. By combining electrical resistivity tomography (ERT), time domain reflectometry, and effluent measurements, we observed different preferential flow phen ...
DOI:
10.2136/vzj2009.0086

17. 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

18. Noninvasive 3-D Transport Characterization in a Sandy Soil Using ERT: 1. Investigating the Validity of ERT-derived Transport Parameters

Author:
Javaux, M.,   et al.   ; Koestel, J.; Vanderborght, J.; Kemna, A.; Binley, A.; Vereecken, H.;     Show all 6 Authors
Source:
Vadose zone journal 2009 v.8 no.3 pp. 711-722
ISSN:
1539-1663
Subject:
temporal variation; mass transfer; sandy soils; accuracy; tomography; time domain reflectometry; soil depth; solutes; validity; velocity; spatial variation; soil transport processes; subsurface flow; nondestructive methods
Abstract:
... We 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–dispers ...
DOI:
10.2136/vzj2008.0027

19. Noninvasive 3-D Transport Characterization in a Sandy Soil Using ERT: 2. Transport Process Inference

Author:
Javaux, M.,   et al.   ; Koestel, J.; Vanderborght, J.; Kemna, A.; Binley, A.; Vereecken, H.;     Show all 6 Authors
Source:
Vadose zone journal 2009 v.8 no.3 pp. 723-734
ISSN:
1539-1663
Subject:
temporal variation; mass transfer; sandy soils; soil hydraulic properties; irrigation systems; tomography; time domain reflectometry; soil depth; solutes; velocity; topsoil; spatial variation; soil transport processes; subsurface flow; nondestructive methods
Abstract:
... In this study, we examined four tracer displacement experiments in a large undisturbed soil column under unsaturated hydraulic steady-state conditions. Using electrical resistivity tomography (ERT), we were able to investigate the corresponding solute transport processes in unprecedented three-dimensional (3-D) spatiotemporally resolved detail. In addition, time-domain reflectometry (TDR) probes a ...
DOI:
10.2136/vzj2008.0154

20. 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