Казанский (Приволжский) федеральный университет, КФУ
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PSEUDO-HYSTERETIC DOUBLE-FRONT HIATUS-STAGE SOIL WATER PARCELS SUPPLYING A PLANT-ROOT CONTINUUM: THE GREEN-AMPT-YOUNGS MODEL REVISITED
Форма представленияСтатьи в зарубежных журналах и сборниках
Год публикации2013
Языканглийский
  • Обносов Юрий Викторович, автор
  • Библиографическое описание на языке оригинала Kacimov, A. and Obnosov, U., 2013. Pseudo-hysteretic double-front hiatus-stage soil water parcels supplying a plant-root continuum: the Green-Ampt-Youngs model revisited.Hydrological Sciences Journal, 58 (1), 237-248. DOI:10.1080/02626667.2012.743028
    Аннотация A tension-saturated water slug descends through a homogenous soil after a rainfall (irrigation) event and shrinks due to transpiration by a distributed root-sink and evaporation. An upper (drainage) and lower (imbibition) sharp fronts of the slug separate it from a superjacent and subjacent vadose zones, where water is immobile. In the slug, the hydraulic conductivity is constant according to the Green-Ampt model. The capillary pressures as well as effective porosities on the fronts are given (generally, different) constants that can be viewed as a kind of hysteresis. A volumetric sink models a mild (no desaturation of the slug) soil water withdrawal by the plant roots. The sink intensity varies with the depth from the soil surface and with time. Mathematically, the hydraulic head is immediately expressed by double integration of a governing 1-D flow equation. The pressure and kinematic conditions on the fronts result in a Cauchy problem for a system of two ODEs, which is solved
    Ключевые слова words Infiltration, two-front Green-Ampt approximation, evapotranspiration, drainage-imbibition, root water uptake, ecohydrology
    Название журнала HYDROLOG SCI J
    URL http://DOI:10.1080/02626667.2012.743028
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