One‐, two‐, and three‐dimensional root water uptake functions for transient modeling

By Jasper A. Vrugt, M. V. Wijk, Jan W. Hopmans, Jirka Šimůnek. 2001

332 citations recorded by the source corpus.

Subfields: Civil and Structural Engineering, Environmental Engineering, Soil Science

View Paper: https://www.semanticscholar.org/paper/04a8c019388bd51c2b6780e456a7b647a19a696c

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Citations in the corpus

Benchmarking test of empirical root water uptake models (2017, background): “In many one- and two-dimensional problems, macroscopic RWU is modelled as a sink term in the Richards equation, whose dependency on water content or pressure head is usually represented by simple empirical functions (e.g. Feddes et al., 1976; Feddes et al., 1978; Lai and Katul, 2000; Li et al., 2001”
Compensatory uptake functions in empirical macroscopic root water uptake models: experimental and numerical analysis (2015, methodology): “This profile was constructed using the Vrugt et al. (2001) function, implemented in the Hydrus (2D/3D) model.”
Validity of First-Order Approximations to Describe Parameter Uncertainty in Soil Hydrologic Models (2002, methodology): “…et al., 1998a; Romano and Santini, 1999) interdependence and model nonlinearity violate the use and from field data (Abbaspour et al., 1999; Musters and of this first-order approximation to obtain exact confiBouten, 2000; Vrugt et al., 2001b,c; among many others). dence intervals of the parameter.”
Implementation and Application of a Root Growth Module in HYDRUS (2018, methodology): “…of the root system and implementation of the Jones et al. (1991) root growth model, a two-dimensional, root length density distribution function (Vrugt et al., 2001a, 2001b) was combined with either the Verhulst–Pearl logistic growth function or a tabulated input of rooting depths (Hartmann and…”
A Generalized Function of Wheat's Root Length Density Distributions (2004, methodology): “The following model is often employed to simulate one- The procedure resulted in 89 data sets from 10 papers (Asseng dimensional vertical soil water flow under evaporative condi- et al., 1997; Lotfollahi et al., 1997; Anderson et al., 1998; Feng tion and in the presence of root-water uptake (van G”
A vertically extended stochastic model of soil moisture in the root zone (2006, background): “A common feature of these representations (except the one by Vrugt et al. [2001] ) is that r(z )i s a decreasing function of z, in good accordance with the field data collected by Schenk and Jackson [2002].”
Root Water Uptake: From Three‐Dimensional Biophysical Processes to Macroscopic Modeling Approaches (2013, unknown): “…one describes the water uptake by plant roots (S < 0) or root exudation (S > 0). his term may difer between authors in terms of dimensionality (Vrugt et al., 2001) but also in terms of complexity and degree of mechanical/biological principles explicitly accounted for (de Willigen et al.,…”
Towards a comprehensive assessment of model structural adequacy (2012, background): “D applications [Vesselinov et al., 2001a, 2001b; Vrugt et al., 2001; Yeh et al., 2002; Vrugt et al., 2004; Ye and Khaleel, 2008; Klaus and Zehe, 2010], although more difficult than in GW due to the increased computational cost of solving variably saturated flow equations, and the challenge of…”
On the identification of macroscopic root water uptake parameters from soil water content observations (2002, methodology): “Although recent studies clearly put forward the limitations of optimizing the root water uptake parameters from soil water content measurements by inverse modeling [see, e.g., Musters et al., 2000; Musters and Bouten, 2000] some authors succeeded in this task [e.g., Vrugt et al., 2001a, 2001b].”
HYDRUS: Model Use, Calibration, and Validation (2012, methodology): “Vrugt et al. (2001a, 2001b) used a genetic algorithm to simultaneously identify soil hydraulic, root water uptake, and root distribution parameters, which would be very difficult, if not impossible, with the standard parameter approaches implemented in HYDRUS.”