2012
DOI: 10.5194/hess-16-2957-2012
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A simple three-dimensional macroscopic root water uptake model based on the hydraulic architecture approach

Abstract: Abstract. Many hydrological models including root water uptake (RWU) do not consider the dimension of root system hydraulic architecture (HA) because explicitly solving water flow in such a complex system is too time consuming. However, they might lack process understanding when basing RWU and plant water stress predictions on functions of variables such as the root length density distribution. On the basis of analytical solutions of water flow in a simple HA, we developed an "implicit" model of the root syste… Show more

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Cited by 185 publications
(229 citation statements)
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“…When the total resistance to flow in the axial direction is small (large axial conductance and/or small transport distance), then the 3-D version of the C model reproduces the flow in the root system exactly that is predicted by solving the flow equations in the root system for boundary conditions that correspond with the soil water potentials (Couvreur et al, 2014b(Couvreur et al, , 2012. In these conditions, K comp should be equal to K rs .…”
Section: Model Descriptionmentioning
confidence: 99%
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“…When the total resistance to flow in the axial direction is small (large axial conductance and/or small transport distance), then the 3-D version of the C model reproduces the flow in the root system exactly that is predicted by solving the flow equations in the root system for boundary conditions that correspond with the soil water potentials (Couvreur et al, 2014b(Couvreur et al, , 2012. In these conditions, K comp should be equal to K rs .…”
Section: Model Descriptionmentioning
confidence: 99%
“…We used two 1-D RWU models: the FJ model (Šimůnek and Hopmans, 2009) and the physically based C model (Couvreur et al, 2012(Couvreur et al, , 2014a, both of which considered water uptake compensation. The two models have been implemented in Hydrus-1-D (Šimůnek et al, 2016).…”
Section: Model Descriptionmentioning
confidence: 99%
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“…Other physical RWU models include Couvreur et al (2012), comparable to De Jong van Lier et al (2013), as well as more complex three-dimensional models (e.g. Javaux et al, 2013), which account for the full root architecture, requiring more input parameters and a higher computational effort.…”
Section: Introductionmentioning
confidence: 99%
“…Plants under well-watered conditions (green) or in water deficit (orange) can have similar leaf water potential via stomatal control (isohydric species). Even in this case, the xylem water potential (which controls leaf growth) is still higher in well-watered plants than in plants under drought conditions because of the steeper gradient of water potential in well-watered plants caused by higher water flux.VZJ | Advancing Critical Zone Science p. 3 of 10 et al, 2014a, 2014b), as it can be measured via pre-dawn leaf water potential (assuming equilibrium) or can be modeled as proposed by Couvreur et al (2012). …”
mentioning
confidence: 99%