Assessing the effects of design and climate change on sediment removal in urban stormwater ponds

Catherine T. Morgan, Kate V. Heal, Steve G. Wallis, Rebecca J. Lunn

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

    Abstract

    Abstract Urban stormwater pond design normally only considers single storm events, does not explicitly consider climate change and is often inconsistent, with some approaches emphasising flow attenuation and others emphasising water quality enhancement. These design issues were explored for sediment removal (by settling) through modelling generic cylindrical ponds sized using current UK guidance. Results showed that ponds designed for flow attenuation had a higher sediment removal efficiency than those designed for water quality enhancement (78% vs 21% removal of incoming sediment, respectively, for the 1 in 2 year storm event). Sediment removal efficiency remained almost unchanged when multiple rather than single storm events were routed through ponds, but decreased with increasing storm event magnitude. Overall, decreased sediment removal is likely from the more frequent and intense storm events predicted due to climate change. Urban stormwater ponds designed for flow attenuation are more successful for both flow and sediment attenuation. Copyright © 2007 IAHS Press.

    Original languageEnglish
    Title of host publicationIAHS-AISH Publication - Water Quality and Sediment Behaviour of the Future: Predictions for the 21st Century
    Pages71-78
    Number of pages8
    Edition314
    Publication statusPublished - 2007
    EventInternational Symposium: Quantification and Reduction of Predictive Uncertainty for Sustainable Water Resources Management - 24th General Assembly of the International Union of Geodesy and Geophysics (IUGG) - Perugia, Italy
    Duration: 2 Jul 200713 Jul 2007

    Conference

    ConferenceInternational Symposium: Quantification and Reduction of Predictive Uncertainty for Sustainable Water Resources Management - 24th General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    CountryItaly
    CityPerugia
    Period2/07/0713/07/07

    Keywords

    • Climate change
    • Design
    • Modelling
    • Ponds
    • Retention basins
    • Scotland
    • Sediment
    • SUDS
    • Urban stormwater

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