Stormwater Symposium

Oral

397636 - Laboratory Study on the Performance of Bioretention for Stormwater Management in Both Warm and Cold, Semi-Arid Climates

Tuesday, June 5
8:30 AM - 10:00 AM
Location: Greenway AB
Co-Authors: Tong Yu, Edmonton, Alberta, Canada – University of Alberta; Xiangfei Li, Edmonton, Alberta, Canada – City of Edmonton

Bioretention, a widely used Low Impact Development (LID) technology, has shown effective stormwater volume and peak flow reduction and acceptable stormwater quality improvement in warm and temperate climates. However, the applicability of bioretention for successful stormwater management during both warm climates and cold or semi-arid regions is still not well understood. Four large column bioretention cells were set up in a controlled laboratory and monitored for 6 months under high loading conditions. Synthetic stormwater was applied weekly to investigate the hydrological and water quality improvement performance of two different soil types, with and without a phosphorus adsorption amendment, additional carbon source, and an internal water storage layer. During simulated storm events, influent and effluent flowrates were measured and influent and effluent volumes were analyzed for total suspended solids (TSS), heavy metals, phosphorus, nitrogen, and chemical oxygen demand (COD). After a period of establishment, the four columns were gradually subjected to freezing conditions (as low as -20 ºC). They were provided time to freeze and then were gradually thawed to simulate a typical Edmonton, Alberta winter and spring melt event. Hydraulic and water quality performance were consistently monitored to investigate the impact of freezing temperatures, salts, and snowmelt. This project aims to fill gaps in knowledge regarding the performance of bioretention systems under cold climate conditions and provide criteria to improve the design of cold climate bioretention systems.

Hannah Kratky

MSc Student
University of Alberta

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Send Email for Hannah Kratky

Zhan Li

MSc Student
University of Alberta

Presentation(s):

Send Email for Zhan Li


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397636 - Laboratory Study on the Performance of Bioretention for Stormwater Management in Both Warm and Cold, Semi-Arid Climates



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