| Content Provider | MDPI |
|---|---|
| Author | Allen, Deonie Olive, Valerie Arthur, Scott Haynes, Heather |
| Abstract | 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. |
| File Size | 1261568 |
| Ending Page | 1067 |
| Page Count | 22 |
| Starting Page | 1046 |
| File Format | |
| e-ISSN | 20734441 |
| DOI | 10.3390/w7031046 |
| Journal | Water |
| Issue Number | 3 |
| Volume Number | 7 |
| Language | English |
| Publisher Date | 2015-03-12 |
| Access Restriction | Open |
| Subject Keyword | sustainable urban drainage vegetated swale rare earth tracing REO trapping efficiency detention urban pollution treatment impervious/vegetation boundary influence first order decay blue-green drainage network |
| Content Type | Text |
| Resource Type | Article |
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