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    An Introduction to the Hyperspace of Penman-Monteith Reference Evapotranspiration

    TitleAn Introduction to the Hyperspace of Penman-Monteith Reference Evapotranspiration
    Publication TypePapers in International Journals
    Year of Publication2019
    AuthorsHaie, N., Pereira R. M. S., Machado G. J. B. Q. A., and Shahidian S.
    Abstract

    Evapotranspiration is crucial and very relevant to hydrology, particularly under global warming and the growing water scarcity. The FAO Penman-Monteith is the highly used method to calculate the daily standardized reference evapotranspiration (ETo). It utilizes seven variables, mostly climatic, and produces a complex n-dimensional domain (or hyperspace). No study has presented the internal structure of this 8D space which forms the objective of the present work. To this end, a computer program called HyperET is developed to facilitate the advancement of two intertwined processes: creating windows into the hyperspace and understanding the resulting regions of the domain. The former gives 2D figures for partial analysis and the latter presents significant infeasible regions which are subspaces composed of ETo values outside its chosen minimum and maximum (or thresholds). HyperET is expensive computationally and presents an ETo domain that resembles Swiss holey cheese with three types of infeasible regions and emerging non-linearity. 

     

    JournalInternational Journal of Hydrology Science and Technology, IJHST
    Volume9
    Issue1
    Pagination48–64
    Date Published2019-01-02
    PublisherInderscience
    ISSN2042-7816; 2042-7808
    DOI10.1504/IJHST.2019.096797
    URLhttps://www.inderscience.com/info/inarticle.php?artid=96797
    KeywordsClimate change, Domain discretization, hydrology, Hyperspace HyperET, Infeasible regions of ETo, Irrigation, n-dimensional analysis, Penman-Monteith Evapotranspiration (ETo), Sefficiency (Sustainable efficiency), Water management and design, Water scarcity
    Citation

    Haie, N., Pereira, R.M.S., Machado, G.J., Shahidian, S. (2019) An introduction to the hyperspace of Penman-Monteith reference evapotranspiration. Int. J. Hydrology Science and Technology (IJHST), 9:1, pp.48–64. DOI: 10.1504/IJHST.2019.096797 

     

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    About CTAC

    The Centre for Territory, Environment and Construction (CTAC) is a research unit of the School of Engineering of University of Minho (UMinho), recognised by the “FCT – Fundação para a Ciência e Tecnologia” (Foundation for Science and Technology), associated to the Department of Civil Engineering (DEC), with whom it shares resources and namely human resources.

    Currently CTAC aggregates 37 researchers holding a PhD of which 27 are faculty professors of the Civil Engineering Department. Read more


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