报告题目：Soil evolution in aging bioretention cells in the USA and China

报 告 人：Joey Smith  博士候选人

邀 请 人：张 翔   教授

时     间：2024年8月13日（星期二）上午11:00

地     点：水资源国重大楼A区202会议室

报告人简介：

Joey Smith，男，美国俄亥俄州立大学博士候选人，武汉大学高级访问学者。在俄亥俄州立大学获得生态工程和汉语语言工程硕士学位。博士研究结合水文学、土壤学和社会科学，分析海绵城市绿色基础设施对社会和自然环境的积极作用。

报告简介：

Bioretention cells are engineered stormwater controls essential for mitigating urbanization's adverse effects but require regular maintenance to ensure their continued hydraulic function. This study examines the accumulation of particulates and organic matter in over 50 bioretention cells, aged less than one to 16 years, in the Midwestern United States and 3 cells, aged three to five years, in Wuhan, China. The presentation reviews past studies on soil evolution within bioretention cells and their predictions of design lifespan, highlighting the reliability of laser diffraction particle size analysis over conventional methods. Findings indicate that mean particle size varies with depth and location, showing larger particles at the forebay/inlet and smaller particles at the middle/outlet. The mean surface intake rate was lowest at the inlet (777.2 mm/hr) and highest at the outlet (1389.4 mm/hr). Key factors influencing soil clogging in bioretention cells include the presence or absence of a forebay, percentage of plant coverage, and average mulch depth. This approach aims to guide maintenance practices effectively and ensure the long-term functionality of bioretention systems in urban stormwater management.

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