Design and Validation of a Test Rig to Simulate High Rainfall Events for Infiltration Studies of Permeable Pavement Systems

Alan P. Newman, Les Duckers, Stephen J. Coupe, Ernest O. Nnadi, Susanne Charlesworth

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    This paper presents the design and validation of a relatively cost-effective test rig to simulate high rainfall events; such a rig offers a great opportunity for conducting studies (e.g., high infiltration studies) that require high intensity of rainfall on pervious pavements and other permeable systems. The calibration of the test rig, which produced more than 600 mm/h rainfall intensity, was successful. A simple method of using digital photography to capture raindrops and determine raindrop diameter was developed and used successfully to determine the drop size of simulated rainfall by the test rig. Results obtained by this method indicated that the raindrop diameter varied from 0.69–8.97 mm, which was consistent with the high rainfall intensity generated by test rig. Categorization of raindrop size according to Wilson Bentley’s classification showed 1.84, 6.42, 33.95, 26.61, and 31.19% for very small, small, medium, large, and very large drops, respectively, which was considered consistent with the relatively high rainfall intensity generated by the test rig.
    Original languageEnglish
    Pages (from-to)553-557
    JournalJournal of Irrigation and Drainage Engineering
    Volume138
    Issue number6
    DOIs
    Publication statusPublished - Jun 2012

    Fingerprint

    test rigs
    pavement
    Infiltration
    Pavements
    rain intensity
    raindrop
    Rain
    infiltration (hydrology)
    infiltration
    rain
    rainfall
    precipitation intensity
    Photography
    Calibration
    Costs and Cost Analysis
    rainfall simulation
    digital images
    photography
    calibration
    test

    Keywords

    • Infiltration
    • Test rig
    • Permeable pavement system
    • Rainfall simulator

    Cite this

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    title = "Design and Validation of a Test Rig to Simulate High Rainfall Events for Infiltration Studies of Permeable Pavement Systems",
    abstract = "This paper presents the design and validation of a relatively cost-effective test rig to simulate high rainfall events; such a rig offers a great opportunity for conducting studies (e.g., high infiltration studies) that require high intensity of rainfall on pervious pavements and other permeable systems. The calibration of the test rig, which produced more than 600 mm/h rainfall intensity, was successful. A simple method of using digital photography to capture raindrops and determine raindrop diameter was developed and used successfully to determine the drop size of simulated rainfall by the test rig. Results obtained by this method indicated that the raindrop diameter varied from 0.69–8.97 mm, which was consistent with the high rainfall intensity generated by test rig. Categorization of raindrop size according to Wilson Bentley’s classification showed 1.84, 6.42, 33.95, 26.61, and 31.19{\%} for very small, small, medium, large, and very large drops, respectively, which was considered consistent with the relatively high rainfall intensity generated by the test rig.",
    keywords = "Infiltration, Test rig, Permeable pavement system, Rainfall simulator",
    author = "Newman, {Alan P.} and Les Duckers and Coupe, {Stephen J.} and Nnadi, {Ernest O.} and Susanne Charlesworth",
    year = "2012",
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    doi = "10.1061/(ASCE)IR.1943-4774.0000446",
    language = "English",
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    AU - Newman, Alan P.

    AU - Duckers, Les

    AU - Coupe, Stephen J.

    AU - Nnadi, Ernest O.

    AU - Charlesworth, Susanne

    PY - 2012/6

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    AB - This paper presents the design and validation of a relatively cost-effective test rig to simulate high rainfall events; such a rig offers a great opportunity for conducting studies (e.g., high infiltration studies) that require high intensity of rainfall on pervious pavements and other permeable systems. The calibration of the test rig, which produced more than 600 mm/h rainfall intensity, was successful. A simple method of using digital photography to capture raindrops and determine raindrop diameter was developed and used successfully to determine the drop size of simulated rainfall by the test rig. Results obtained by this method indicated that the raindrop diameter varied from 0.69–8.97 mm, which was consistent with the high rainfall intensity generated by test rig. Categorization of raindrop size according to Wilson Bentley’s classification showed 1.84, 6.42, 33.95, 26.61, and 31.19% for very small, small, medium, large, and very large drops, respectively, which was considered consistent with the relatively high rainfall intensity generated by the test rig.

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    KW - Test rig

    KW - Permeable pavement system

    KW - Rainfall simulator

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