Soil hydraulic properties affecting discharge uniformity of gravity-fed subsurface drip irrigation systems

N. Lazarovitch, U. Shani, Thomas L. Thompson, A. W. Warrick

    Research output: Contribution to journalArticlepeer-review

    47 Scopus citations

    Abstract

    The use of subsurface drip irrigation (SDI) is increasing for many reasons, including its many agronomic advantages and the ability for safe application of wastewater to crops. In contrast to surface drip irrigation, soil hydraulic properties may affect SDI performance, particularly for new SDI systems designed to operate under low pressure (e.g., 2m of head). This work introduces a new approach for solving problems of predicting discharge in SDI laterals. We accomplish this by coupling models of head loss in laterals and soil impacts on dripper discharge. The coupled model enables an evaluation of the performance of SDI laterals while changing inputs, such as the lateral diameter, length and slope, dripper nominal discharge and exponent, inlet pressure head, soil hydraulic properties, and soil spatial variability. This model is used to determine the coefficient of variation of discharge for two numerical comparisons.

    Original languageEnglish
    Pages (from-to)531-536
    Number of pages6
    JournalJournal of Irrigation and Drainage Engineering
    Volume132
    Issue number6
    DOIs
    StatePublished - 1 Nov 2006

    Keywords

    • Hydraulic models
    • Soil permeability
    • Spatial distribution
    • Trickle irrigation
    • Uniform flow

    ASJC Scopus subject areas

    • Civil and Structural Engineering
    • Water Science and Technology
    • Agricultural and Biological Sciences (miscellaneous)

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