Ranking Three Water Sensitive Urban Design (WSUD) Practices Based on Hydraulic and Water Quality Treatment Performance: Implications for Effective Stormwater Treatment Design

Bioretention basins, constructed wetlands and roadside swales are among the most common Water-Sensitive Urban Design (WSUD) or stormwater quality treatment systems. Although these systems can reduce stormwater quantity and improve quality, their hydraulic and water quality treatment performances are...

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Bibliographic Details
Published inWater (Basel) Vol. 14; no. 8; p. 1296
Main Authors Liu, An, Egodawatta, Prasanna, Goonetilleke, Ashantha
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.04.2022
Subjects
Artificial wetlands
Basins
bioretention basin
constructed wetland
Constructed wetlands
Design
Efficiency
Hydraulics
Pollutants
Quality control
Rain and rainfall
Rainfall
Ranking
Retention basins
roadside swale
Runoff volume
Stormwater
stormwater pollutant processes
Stormwater quality
Swales
Urban planning
Vegetation
Water quality
Water supply
Water treatment
Water-Sensitive Urban Design (WSUD)
Wetlands
Australia
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Summary:Bioretention basins, constructed wetlands and roadside swales are among the most common Water-Sensitive Urban Design (WSUD) or stormwater quality treatment systems. Although these systems can reduce stormwater quantity and improve quality, their hydraulic and water quality treatment performances are different. The aim of this study was to investigate the hydraulic and water quality performance of a bioretention basin, a constructed wetland and a roadside swale by analyzing monitored water quantity and quality data from a range of rainfall events using a ranking approach. The study outcomes showed that a bioretention basin performed better in relation to peak flow and runoff volume reduction while the constructed wetland tended to produce better outflow water quality. The roadside swale had a relatively lower capacity for treating stormwater. These results suggest that a bioretention basin could be the preferred option when the primary requirement is water quantity improvement. However, if water quality improvement is the primary consideration, a constructed wetland could be more efficient. Additionally, when designing a treatment train, it appears to be preferable to place a bioretention basin prior to a constructed wetland. Further, a swale appears to be more appropriate for use as a pretreatment device. The research study outcomes will contribute to effective stormwater treatment design.
ISSN:2073-4441
2073-4441
DOI:10.3390/w14081296