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    Monitoring the Water Quality Benefits of a Triangular Swale Treating a Highway Runoff

    Source: Journal of Sustainable Water in the Built Environment:;2021:;Volume ( 007 ):;issue: 001::page 05020004-1
    Author:
    Stacy K. Luell
    ,
    Ryan J. Winston
    ,
    William F. Hunt
    DOI: 10.1061/JSWBAY.0000929
    Publisher: ASCE
    Abstract: Swales are among the most commonly used stormwater control measures (SCMs) worldwide. In 2009, the North Carolina DOT constructed a grassed swale in Knightdale, North Carolina, in the right-of-way of Interstate 540 near Mango Creek. The swale had a rock-lined forebay, v-shaped cross-section, a sinuosity of 1.1, 2% longitudinal slope, and 37-m centerline length. The swale was vegetated with tall fescue sod and partly below the Interstate 540 southbound bridge deck. Flow-volume weighted, composite water quality samples were collected for more than 30 runoff events at the inlet and outlet of the swale and tested for nitrogen species [total Kjeldahl nitrogen (TKN), ammonia-nitrogen (TAN), and nitrate- and nitrate-nitrogen (NO3)], total phosphorous (TP), and total suspended solids (TSS). The mean effluent total nitrogen, total phosphorous, and total suspended solids concentrations released by the swale were 0.99, 0.16, and 39  mg/L, respectively. Particle size distributions analyzed for three storms showed that the swale and its forebay most easily transported particles in the range of 0.4–40  μm and most effectively trapped particles in the range of 100–2,000  μm in diameter. Although this swale reduced the pollutants associated with coarse particulates (typical of highway runoff), coupling swales with other SCMs is recommended to meet target total nitrogen (TN) and TP thresholds.
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      Monitoring the Water Quality Benefits of a Triangular Swale Treating a Highway Runoff

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    contributor authorStacy K. Luell
    contributor authorRyan J. Winston
    contributor authorWilliam F. Hunt
    date accessioned2022-02-01T00:01:43Z
    date available2022-02-01T00:01:43Z
    date issued2/1/2021
    identifier otherJSWBAY.0000929.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4270775
    description abstractSwales are among the most commonly used stormwater control measures (SCMs) worldwide. In 2009, the North Carolina DOT constructed a grassed swale in Knightdale, North Carolina, in the right-of-way of Interstate 540 near Mango Creek. The swale had a rock-lined forebay, v-shaped cross-section, a sinuosity of 1.1, 2% longitudinal slope, and 37-m centerline length. The swale was vegetated with tall fescue sod and partly below the Interstate 540 southbound bridge deck. Flow-volume weighted, composite water quality samples were collected for more than 30 runoff events at the inlet and outlet of the swale and tested for nitrogen species [total Kjeldahl nitrogen (TKN), ammonia-nitrogen (TAN), and nitrate- and nitrate-nitrogen (NO3)], total phosphorous (TP), and total suspended solids (TSS). The mean effluent total nitrogen, total phosphorous, and total suspended solids concentrations released by the swale were 0.99, 0.16, and 39  mg/L, respectively. Particle size distributions analyzed for three storms showed that the swale and its forebay most easily transported particles in the range of 0.4–40  μm and most effectively trapped particles in the range of 100–2,000  μm in diameter. Although this swale reduced the pollutants associated with coarse particulates (typical of highway runoff), coupling swales with other SCMs is recommended to meet target total nitrogen (TN) and TP thresholds.
    publisherASCE
    titleMonitoring the Water Quality Benefits of a Triangular Swale Treating a Highway Runoff
    typeJournal Paper
    journal volume7
    journal issue1
    journal titleJournal of Sustainable Water in the Built Environment
    identifier doi10.1061/JSWBAY.0000929
    journal fristpage05020004-1
    journal lastpage05020004-9
    page9
    treeJournal of Sustainable Water in the Built Environment:;2021:;Volume ( 007 ):;issue: 001
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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