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    • Hydrology and Water Resources in Arizona and the Southwest, Volume 12 (1982)
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    A RPN Program for the Generalized Penman Equation

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    Author
    Gay, L. W.
    Greenberg, Robert J.
    Affiliation
    School of Renewable Natural Resources, The University of Arizona, Tucson, AZ 85721
    Issue Date
    1982-04-24
    Keywords
    Hydrology -- Arizona.
    Water resources development -- Arizona.
    Hydrology -- Southwestern states.
    Water resources development -- Southwestern states.
    
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    Rights
    Copyright ©, where appropriate, is held by the author.
    Collection Information
    This article is part of the Hydrology and Water Resources in Arizona and the Southwest collections. Digital access to this material is made possible by the Arizona-Nevada Academy of Science and the University of Arizona Libraries. For more information about items in this collection, contact anashydrology@gmail.com.
    Publisher
    Arizona-Nevada Academy of Science
    Journal
    Hydrology and Water Resources in Arizona and the Southwest
    Abstract
    The Penman potential evapotranspiration model has been expanded and generalized for a vide range of climatic conditions by J. Doorenbos and W. 0. Pruitt (1975, FAO Irrig. & Drain. Pap. 24). Their comprehensive model relies heavily on tabulations and graphs to facilitate its application in remote areas where computer facilities are lacking. Future applications of this model have been substantially enhanced by our development of a program that runs on a HP-41C /CV calculator. The RPN program occupies 1778 bytes of memory, and will run on a 41CV, or a 41C with a quad memory module. A printer is also needed. The required climatic data can be input in a variety of forms, and program execution was planned with particular attention to the non- technical user. The entire calculator system (41CV, printer, card reader) cost less than $750, and provides for very portable use with a high degree of computing power.
    ISSN
    0272-6106
    Collections
    Hydrology and Water Resources in Arizona and the Southwest, Volume 12 (1982)

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