Twenty-year Performance Evaluation of Grass Swale and Perforated Pipe Drainage Systems

Sabourin, Jean-François; Wilson, Heather C.

doi:10.2175/193864711802766254

Cited by 1 publication

(3 citation statements)

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“…Runoff event specific sediment detention for a swale is expected to be approximately 90% [3,4,40]. Analysis of the REO concentrations for the initial (runoff event 1) 30 min event agreed with general sediment treatment expectations.…”

Section: Reo Trace Resultsmentioning

confidence: 55%

“…Pollen and magnetic fluorescent material tracers are limited in availability, pollen by the natural availability and fluorescent particles by the artificial fluorescent colours available. Painted natural particles have limited field resilience, and radionuclide [3,4] tracers have been recorded to move both adsorbed and without adsorption to sediment across natural surfaces [5]. Furthermore, the use of radionuclides requires environmental agency permission in many locations, limiting the ease of method availability.…”

Section: Sediment Tracing Methodsmentioning

confidence: 99%

“…The efficiency of SuDS, including vegetated swales, has been investigated by leading SuDS researchers within the laboratory and in the field under single runoff event conditions. Both simulated and naturally occurring runoff events have been monitored during research completed by Sabourin and Wilson (2008) [3], and single runoff event specific pollutant removal efficiencies have been defined through analysis of this work. Deletic (2001) [4] reported that swale total suspended solid reduction in initial event flows range between 78% and 86%.…”

Section: Introductionmentioning

confidence: 99%

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Urban Sediment Transport through an Established Vegetated Swale: Long Term Treatment Efficiencies and Deposition

Allen

Olive

Arthur

et al. 2015

Water

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Vegetated swales are an accepted and commonly implemented sustainable urban drainage system in the built urban environment. Laboratory and field research has defined the effectiveness of a vegetated swale in sediment detention during a single rainfall-runoff event. Event mean concentrations of suspended and bed load sediment have been calculated using current best analytical practice, providing single runoff event specific sediment conveyance volumes through the swale. However, mass and volume of sediment build up within a swale over time is not yet well defined. This paper presents an effective field sediment tracing methodology and analysis that determines the quantity of sediment deposited within a swale during initial and successive runoff events. The use of the first order decay rate constant, k, as an effective pollutant treatment parameter is considered in detail. Through monitoring tagged sediment deposition within the swale, the quantity of sediment that is re-suspended, conveyed, re-deposited or transported out of the swale as a result of multiple runoff events is illustrated. Sediment is found to continue moving through the vegetated swale after initial deposition, with ongoing discharge resulting from resuspension and conveyance during subsequent runoff events. The majority of sediment initially deposited within a swale is not detained long term or throughout its design life of the swale.

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Section: Reo Trace Resultsmentioning

confidence: 55%