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  • On-site stormwater detention for Australian development projects: Does it meet frequent flow management objectives?

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    Ronalds222407.pdf (1016.Kb)
    Author(s)
    Ronalds, Rodney
    Rowlands, Alex
    Zhang, Hong
    Griffith University Author(s)
    Zhang, Hong
    Ronalds, Rodney J.
    Year published
    2019
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    Abstract
    On-site stormwater detention (OSD) is a conventional component of urban drainage systems, designed with the intention of mitigating the increase to peak discharge of stormwater runoff that inevitably results from urbanization. In Australia, singular temporal patterns for design storms have governed the inputs of hydrograph generation and in turn the design process of OSD for the last three decades. This paper raises the concern that many existing OSD systems designed using the singular temporal pattern for design storms may not be achieving their stated objectives when they are assessed against a variety of alternative ...
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    On-site stormwater detention (OSD) is a conventional component of urban drainage systems, designed with the intention of mitigating the increase to peak discharge of stormwater runoff that inevitably results from urbanization. In Australia, singular temporal patterns for design storms have governed the inputs of hydrograph generation and in turn the design process of OSD for the last three decades. This paper raises the concern that many existing OSD systems designed using the singular temporal pattern for design storms may not be achieving their stated objectives when they are assessed against a variety of alternative temporal patterns. The performance of twenty real OSD systems was investigated using two methods: (1) ensembles of design temporal patterns prescribed in the latest version of Australian Rainfall and Runoff, and (2) real recorded rainfall data taken from pluviograph stations modeled with continuous simulation. It is shown conclusively that the use of singular temporal patterns is ineffective in providing assurance that an OSD will mitigate the increase to peak discharge for all possible storm events. Ensemble analysis is shown to provide improved results. However, it also falls short of providing any guarantee in the face of naturally occurring rainfall.
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    Journal Title
    Water Science and Engineering
    Volume
    12
    Issue
    1
    DOI
    https://doi.org/10.1016/j.wse.2019.03.004
    Copyright Statement
    © 2019 Hohai University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
    Subject
    Environmental Sciences
    Science & Technology
    Physical Sciences
    Water Resources
    Stormwater detention
    Frequent flow management
    Publication URI
    http://hdl.handle.net/10072/386737
    Collection
    • Journal articles

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