测量道路排水中的沉积物负荷和颗粒大小分布:通过雨水控制措施对沉积物去除的影响
Ryan J Winston1, Jon D Witter2, R Andrew Tirpak3
1Department of Food, Agricultural, and Biological Engineering, The Ohio State University, 590 Woody Hayes Dr., Columbus, OH 43210, USA; Department of Civil, Environmental, and Geodetic Engineering, The Ohio State University, 2070 Neil Ave., Columbus, OH 43210, USA.
The Science of the total environment
|August 9, 2023
概括
道路排水带有沉积物污染物,影响水质. 沉积物颗粒大小因道路类型而异,影响清洁水道的雨水控制措施的有效性.
科学领域:
- 环境科学 环境科学
- 水质管理水质管理
- 土木工程 土木工程是指土木工程.
背景情况:
- 道路排水是污染水的重要来源,携带沉积物降低水生息地和减少水库容量.
- 了解沉积物颗粒大小分布 (PSD) 对于设计有效的雨水控制措施 (SCM) 来实现沉积物清除目标至关重要.
研究的目的:
- 为了评估俄俄州各种道路类型的道路排水中的沉积物颗粒大小分布 (PSD).
- 评估道路特征,交通量和流水中的沉积物特征之间的关系.
- 根据PSD数据为SCM的选择和设计提供信息.
主要方法:
- 在俄俄州的12个道路站点进行了为期两年的实地监测研究.
- 收集和分析道路流水中的沉积物样本,以确定颗粒大小分布 (PSD) 和总悬浮固体 (TSS) 度.
- 沉积物特征与道路功能类别,年平均每日交通量 (AADT),先前的干旱期,降雨强度和土地使用相关.
主要成果:
- 在州际高速公路和小动脉上发现了最高的TSS度,受AADT以外的因素的影响.
- 平均TSS负载为每场风暴事件2.7公斤/公,年负载范围为98至519公斤/公.
- 州际高速公路呈现出更细的PSD,而低密度住宅区的道路则具有更粗的PSD. 中位数d50为52.5微米.
结论:
- 道路特征显著影响排水中的沉积物PSD,影响SCM性能.
- 干燥拘留盆地和湿池/湿地在各种PSD中都是有效的.
- 水力动力分离器和介质过器在较粗的PSD中最有效,这种PSD在低密度住宅区很常见.
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