Modelling trickle irrigation: Comparison of analytical and numerical models for estimation of wetting front position with time

F.J. Cook, P. Fitch, P.J. Thorburn, P.B. Charlesworth, Keith Bristow

    Research output: Book chapter/Published conference paperConference paper

    Abstract

    Irrigation practices that are profligate in their use of water have come under closer scrutinyby water managers and the public. Trickle irrigation has the propensity to increase water use efficiencybut only if the system is designed to meet the soil and plant conditions. Recently we have provided asoftware tool, WetUp, to calculate the wetting patterns from trickle irrigation emitters. WetUp uses ananalytical solution to calculate the wetted perimeter for both buried and surface emitters. Thisanalytical solution has a number of assumptions, one of which is that the hydraulic conductivity (k) atthe wetting front is a specific value. Here we compare the wetting patterns calculated with a 2-dimensional numerical model, HYDRUS2D, for solving the flow into typical soils with the analyticalsolution. The results show that the wetting patterns are similar. Difficulties were experienced withgetting stable solutions with HYDRUS2D for soils with low hydraulic conductivities.
    Original languageEnglish
    Title of host publicationIntegrative Modelling of Biophysical, Social and Economic Systems for Resource Management Solutions
    EditorsD.A. Post
    Place of PublicationAustralia
    PublisherModelling and Simulation Society of Australia and New Zealand
    Pages212-217
    Number of pages6
    ISBN (Electronic)174052098X
    Publication statusPublished - 2003
    EventMODSIM 2003 International Congress on Modelling and Simulation. - Townsville, Queensland, Australia
    Duration: 14 Jul 200317 Jul 2003

    Conference

    ConferenceMODSIM 2003 International Congress on Modelling and Simulation.
    CountryAustralia
    Period14/07/0317/07/03

    Fingerprint

    wetting front
    wetting
    hydraulic conductivity
    modeling
    soil
    water use
    irrigation
    water
    comparison
    trickle irrigation

    Cite this

    Cook, F. J., Fitch, P., Thorburn, P. J., Charlesworth, P. B., & Bristow, K. (2003). Modelling trickle irrigation: Comparison of analytical and numerical models for estimation of wetting front position with time. In D. A. Post (Ed.), Integrative Modelling of Biophysical, Social and Economic Systems for Resource Management Solutions (pp. 212-217). Australia: Modelling and Simulation Society of Australia and New Zealand.
    Cook, F.J. ; Fitch, P. ; Thorburn, P.J. ; Charlesworth, P.B. ; Bristow, Keith. / Modelling trickle irrigation : Comparison of analytical and numerical models for estimation of wetting front position with time. Integrative Modelling of Biophysical, Social and Economic Systems for Resource Management Solutions. editor / D.A. Post. Australia : Modelling and Simulation Society of Australia and New Zealand, 2003. pp. 212-217
    @inproceedings{d7d25e53e3274d08af395f51538bd43a,
    title = "Modelling trickle irrigation: Comparison of analytical and numerical models for estimation of wetting front position with time",
    abstract = "Irrigation practices that are profligate in their use of water have come under closer scrutinyby water managers and the public. Trickle irrigation has the propensity to increase water use efficiencybut only if the system is designed to meet the soil and plant conditions. Recently we have provided asoftware tool, WetUp, to calculate the wetting patterns from trickle irrigation emitters. WetUp uses ananalytical solution to calculate the wetted perimeter for both buried and surface emitters. Thisanalytical solution has a number of assumptions, one of which is that the hydraulic conductivity (k) atthe wetting front is a specific value. Here we compare the wetting patterns calculated with a 2-dimensional numerical model, HYDRUS2D, for solving the flow into typical soils with the analyticalsolution. The results show that the wetting patterns are similar. Difficulties were experienced withgetting stable solutions with HYDRUS2D for soils with low hydraulic conductivities.",
    keywords = "Analytical modelling, Numerical modelling, Trickle irrigation, Wetting patterns",
    author = "F.J. Cook and P. Fitch and P.J. Thorburn and P.B. Charlesworth and Keith Bristow",
    note = "Imported on 03 May 2017 - DigiTool details were: publisher = Australia: Modelling and Simulation Society of Australia and New Zealand, 2003. editor/s (773b) = Post, D A ; Event dates (773o) = 14-17 July 2003; Parent title (773t) = MODSIM 2003 International Congress on Modelling and Simulation..",
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    Cook, FJ, Fitch, P, Thorburn, PJ, Charlesworth, PB & Bristow, K 2003, Modelling trickle irrigation: Comparison of analytical and numerical models for estimation of wetting front position with time. in DA Post (ed.), Integrative Modelling of Biophysical, Social and Economic Systems for Resource Management Solutions. Modelling and Simulation Society of Australia and New Zealand, Australia, pp. 212-217, MODSIM 2003 International Congress on Modelling and Simulation., Australia, 14/07/03.

    Modelling trickle irrigation : Comparison of analytical and numerical models for estimation of wetting front position with time. / Cook, F.J.; Fitch, P.; Thorburn, P.J.; Charlesworth, P.B.; Bristow, Keith.

    Integrative Modelling of Biophysical, Social and Economic Systems for Resource Management Solutions. ed. / D.A. Post. Australia : Modelling and Simulation Society of Australia and New Zealand, 2003. p. 212-217.

    Research output: Book chapter/Published conference paperConference paper

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    T2 - Comparison of analytical and numerical models for estimation of wetting front position with time

    AU - Cook, F.J.

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    AU - Bristow, Keith

    N1 - Imported on 03 May 2017 - DigiTool details were: publisher = Australia: Modelling and Simulation Society of Australia and New Zealand, 2003. editor/s (773b) = Post, D A ; Event dates (773o) = 14-17 July 2003; Parent title (773t) = MODSIM 2003 International Congress on Modelling and Simulation..

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    N2 - Irrigation practices that are profligate in their use of water have come under closer scrutinyby water managers and the public. Trickle irrigation has the propensity to increase water use efficiencybut only if the system is designed to meet the soil and plant conditions. Recently we have provided asoftware tool, WetUp, to calculate the wetting patterns from trickle irrigation emitters. WetUp uses ananalytical solution to calculate the wetted perimeter for both buried and surface emitters. Thisanalytical solution has a number of assumptions, one of which is that the hydraulic conductivity (k) atthe wetting front is a specific value. Here we compare the wetting patterns calculated with a 2-dimensional numerical model, HYDRUS2D, for solving the flow into typical soils with the analyticalsolution. The results show that the wetting patterns are similar. Difficulties were experienced withgetting stable solutions with HYDRUS2D for soils with low hydraulic conductivities.

    AB - Irrigation practices that are profligate in their use of water have come under closer scrutinyby water managers and the public. Trickle irrigation has the propensity to increase water use efficiencybut only if the system is designed to meet the soil and plant conditions. Recently we have provided asoftware tool, WetUp, to calculate the wetting patterns from trickle irrigation emitters. WetUp uses ananalytical solution to calculate the wetted perimeter for both buried and surface emitters. Thisanalytical solution has a number of assumptions, one of which is that the hydraulic conductivity (k) atthe wetting front is a specific value. Here we compare the wetting patterns calculated with a 2-dimensional numerical model, HYDRUS2D, for solving the flow into typical soils with the analyticalsolution. The results show that the wetting patterns are similar. Difficulties were experienced withgetting stable solutions with HYDRUS2D for soils with low hydraulic conductivities.

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    Cook FJ, Fitch P, Thorburn PJ, Charlesworth PB, Bristow K. Modelling trickle irrigation: Comparison of analytical and numerical models for estimation of wetting front position with time. In Post DA, editor, Integrative Modelling of Biophysical, Social and Economic Systems for Resource Management Solutions. Australia: Modelling and Simulation Society of Australia and New Zealand. 2003. p. 212-217