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.

Original languageEnglish
Title of host publicationWater Quality and Sediment Behaviour of the Future: Predictions for the 21st Century
Subtitle of host publicationIAHS Proceedings & Reports
EditorsBruce Webb, Dirk de Boer
PublisherIAHS Press
Pages71-78
Number of pages8
Volume314
ISBN (Print)9781901502145
Publication statusPublished - 2007
EventInternational Symposium: Water Quality and Sediment Behaviour of the Future: Predictions for the 21st Century - 24th General Assembly of the International Union of Geodesy and Geophysics (IUGG) - Perugia, Italy
Duration: 11 Jul 200713 Jul 2007

Publication series

NameIAHS-AISH Publication
Number314
ISSN (Print)0144-7815

Conference

ConferenceInternational Symposium: Water Quality and Sediment Behaviour of the Future: Predictions for the 21st Century - 24th General Assembly of the International Union of Geodesy and Geophysics (IUGG)
CountryItaly
CityPerugia
Period11/07/0713/07/07

Keywords

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

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