Compensation in Root Water Uptake Models Combined with Three-Dimensional Root Length Density Distribution

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    17 Citations (Scopus)

    Abstract

    A three-dimensional root length density distribution function is introduced that made it possible to compare two empirical uptake models with a more mechanistic uptake model. Adding a compensation component to the more empirical model resulted in predictions of root water uptake distributions similar to those predicted by the more complex model. Because root water uptake is a considerable component in the soil water balance, a lot of attention has been paid to defining and applying root water uptake models. These models can be grouped into empirical vs. mechanistic root uptake models. Intermodel comparisons are valuable in understanding the different concepts used. Such a comparison is sometimes difficult because the level of information required by the models is different, for example, information on the root length density distribution. Here a three-dimensional root length density distribution function is introduced that makes it possible to compare two empirical uptake models with a more mechanistic uptake model. Adding a compensation component to the more empirical model results in prediction of root water uptake distributions in the root zone similar to those predicted by the more complex model.
    Original languageEnglish
    Number of pages9
    JournalVadose Zone Journal
    Volume13
    Issue number2
    DOIs
    Publication statusPublished - 2014

    Keywords

    • hydraulic architecture
    • integrated approach
    • porous-media
    • absorption
    • conductivity
    • systems
    • soils

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