Hydraulic conductivity and impact on retrofit stormwater biofiltration - case study of the design, assessment and function of retrofit raingardens using different filter media in Sydney

Olof J. Jonasson, Peter Davies, Sophia Findlay

    Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

    Abstract

    This paper presents a case study of the design and performance of various biofiltration systems using different filter media and different methods to measure hydraulic conductivity. Modelling undertaken as part of this study indicated that for small systems a high hydraulic conductivity will result in a better overall performance. Assessment of the hydraulic performance of four biofiltration systems was carried out using two different methods, both using a single ring infiltrometer but using different formulas to calculate the hydraulic conductivity. The results showed that biofiltration using sandy loam reported significantly lower hydraulic conductivity using both methods than that previously reported in laboratory tests. In all testing there was great variability in the results suggesting the need for caution to rely on any single test or method to accurately report the hydraulic conductivity. From a design and operational perspective this study supports the use of sand over sandy loam as a filter media particularly where there is insufficient space to size the biofiltration system according to best practice guidelines.
    Original languageEnglish
    Title of host publicationProceedings of the 7th International Conference on Sustainable techniques and strategies in urban water management, 27 June -1 July 2010 Lyon, France
    Place of PublicationFrance
    PublisherNovatech
    Pages1-10
    Number of pages10
    Publication statusPublished - 2010
    EventInternational Conference on Sustainable Techniques and Strategies in Urban Water Management (7th : 2010) - Lyon
    Duration: 27 Jun 20101 Jul 2010

    Conference

    ConferenceInternational Conference on Sustainable Techniques and Strategies in Urban Water Management (7th : 2010)
    CityLyon
    Period27/06/101/07/10

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