报告题目：Evaluating older bioretention performance: Soil development, pollution accumulation, and water quality performance

报 告 人：Ryan Winston  副教授

邀 请 人：张 翔   教授

时     间：2024年8月13日（星期二）上午10:00

地     点：水资源国重大楼A区202会议室

报告人简介：

Ryan Winston，男，美国俄亥俄州立大学食品、农业和生物工程系，土木、环境和大地测量工程系副教授。曾任俄亥俄州立大学食品、农业和生物工程系的研究助理教授，北卡罗莱纳州立大学推广助理。美国土木工程师协会注册专业工程师，《Sustainable Water in the Built Environment》副主编。

主要从事城市雨水径流水文水质研究以及雨水控制措施的效果研究。先后主持了多次绿色基础设施相关会议，多项创新雨水管理重点项目，开展了雨水控制措施维护相关的检查、维护课程。其团队的研究内容主要包括“哥伦布蓝图”绿色基础设施项目、绿色码头、生物滞留柱结构及材料研究、酸性矿井排水研究等。

报告简介：

Bioretention is among the most frequently implemented green stormwater infrastructure practices. Beyond basic maintenance checks, however, little monitoring is done, despite functioning to clean stormwater for years. This seminar will focus on a field research study aimed at understanding pollutant accumulation and soil development in older bioretention cells. We visited 29 bioretention facilities in Ohio, Michigan, and Kentucky and sampled soils in the forebay (if present), and near the inlet, middle, and outlet of each bioretention cell. Further, three soil depths (0-5, 10-15, and 36-50 cm) were sampled to understand how pollutants accumulate spatially and with depth, with the ultimate goal of informing maintenance. The outcomes of this study include an understanding of phosphorus, metals, microplastics, PAHs, PCBs, alkylphenols, phthalates, and PFAS accumulation in older bioretention media. Further, we evaluate hydraulic function of the media using quick infiltration tests and relate the hydraulics to soil physical properties, including the development of an organic horizon on top of the filter media. Practical recommendations will be provided from the study including when and where to maintain field-scale bioretention systems.

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