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    Stormwater Treatment Effectiveness of Established Lined Bioretention Facilities in Portland, Oregon

    Source: Journal of Sustainable Water in the Built Environment:;2021:;Volume ( 007 ):;issue: 002::page 05021002-1
    Author:
    Emma Kohlsmith
    ,
    Jennifer Morse
    ,
    Cara Poor
    ,
    Jason Law
    DOI: 10.1061/JSWBAY.0000943
    Publisher: ASCE
    Abstract: Bioretention systems are commonly used to treat and detain stormwater runoff and help mitigate many negative effects of urbanization. The goal of this project is to assess the pollution reduction effectiveness of lined bioretention facilities that have been in use and functioning for four to eight years. Lined bioretention facilities are installed with an impermeable liner below the facility to prevent exfiltration of stormwater into the surrounding soil. Grab samples were taken from seven facilities in Portland, Oregon, over a two-year period to measure the quality of stormwater flowing into and out of the facilities. Results showed decreased concentrations of total suspended solids (TSS; 94%), ammonia (85%), total copper (59%), total zinc (80%), and dissolved zinc (41%). However, the facilities were found to increase levels of nitrate (2,070%) and orthophosphate (141%) in the outflow. Based on this study, effective TSS removal by bioretention facilities does not necessarily equate to equally effective treatment of other pollutants (especially orthophosphate and nitrate). Additional research is necessary to determine the significance of the observed increase in nutrients, understand the underlying mechanisms, and test possible design modifications to improve nitrate and orthophosphate removal.
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      Stormwater Treatment Effectiveness of Established Lined Bioretention Facilities in Portland, Oregon

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4270786
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    • Journal of Sustainable Water in the Built Environment

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    contributor authorEmma Kohlsmith
    contributor authorJennifer Morse
    contributor authorCara Poor
    contributor authorJason Law
    date accessioned2022-02-01T00:02:05Z
    date available2022-02-01T00:02:05Z
    date issued5/1/2021
    identifier otherJSWBAY.0000943.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4270786
    description abstractBioretention systems are commonly used to treat and detain stormwater runoff and help mitigate many negative effects of urbanization. The goal of this project is to assess the pollution reduction effectiveness of lined bioretention facilities that have been in use and functioning for four to eight years. Lined bioretention facilities are installed with an impermeable liner below the facility to prevent exfiltration of stormwater into the surrounding soil. Grab samples were taken from seven facilities in Portland, Oregon, over a two-year period to measure the quality of stormwater flowing into and out of the facilities. Results showed decreased concentrations of total suspended solids (TSS; 94%), ammonia (85%), total copper (59%), total zinc (80%), and dissolved zinc (41%). However, the facilities were found to increase levels of nitrate (2,070%) and orthophosphate (141%) in the outflow. Based on this study, effective TSS removal by bioretention facilities does not necessarily equate to equally effective treatment of other pollutants (especially orthophosphate and nitrate). Additional research is necessary to determine the significance of the observed increase in nutrients, understand the underlying mechanisms, and test possible design modifications to improve nitrate and orthophosphate removal.
    publisherASCE
    titleStormwater Treatment Effectiveness of Established Lined Bioretention Facilities in Portland, Oregon
    typeJournal Paper
    journal volume7
    journal issue2
    journal titleJournal of Sustainable Water in the Built Environment
    identifier doi10.1061/JSWBAY.0000943
    journal fristpage05021002-1
    journal lastpage05021002-12
    page12
    treeJournal of Sustainable Water in the Built Environment:;2021:;Volume ( 007 ):;issue: 002
    contenttypeFulltext
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