中文关键词
降雨径流污染初期冲刷污染负荷城市小区最佳截留占比 | 英文关键词surface runoff pollutionfirst flushpollution loadurban communityoptimal retention proportion |
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| 中文摘要 |
| 太湖平原是我国城市化快速发展的地区，同时也是水环境问题最突出的地区之一.虽然该区域在国家大力治理下点源污染基本得到控制，但是城市降雨径流污染仍是当前关注的热点问题.为此本文选择了不同类型城市小区开展降雨时径流污染物浓度变化对比实验观测，根据采集的多个降雨场次径流污染数据，采用多种方法计算和分析该地区不同类型小区降雨径流特征并估算污染负荷.结果表明，太湖平原地区城市居民小区的降雨径流会污染河道水质；不同类型城市小区都具有一定初期冲刷效应，商业住宅小区污染较商住私房混合小区轻，但是初期冲刷效应更加明显；太湖流域平原地区商住私房混合小区和商住餐饮小区最佳初期流量截留占比为30%，商业住宅小区则为25%.太湖流域平原地区在全国不同的城市小区中整体污染负荷较高，尤其体现在氮磷污染.该研究对高度城市化地区城市小区降雨径流污染治理有重要参考价值. |
| 英文摘要 |
| The Taihu Lake plain is a highly urbanized region in China with many water-related environmental problems. Although point-source pollution has been effectively controlled by government legislation, urban surface runoff pollution is still a major issue. Different types of urban communities were selected for rainfall runoff experiments. According to the monitoring data of rainfall events, multiple methods were used to analyze the characteristics of surface runoff pollution and estimate the pollution load for different types of communities. The results indicated that surface runoff from urban communities reduced the river water quality. Certain degrees of the ‘first flush’ effect occurred in different types of urban communities. The surface runoff pollution in the commercial residential community was weaker than that in commercial and private residential communities; however, the first flush occurred more frequently in the commercial residential community. Holding back 30% of the surface runoff could effectively improve the runoff water quality in commercial and private residential communities as well as the commercial residential community with restaurants. In the commercial residential community, 25% of surface runoff should be held to improve runoff water quality effectively. The loads of pollutants, especially nitrogen and phosphorus, in urban communities in the Taihu Lake basin were higher than those in other regions in China. This research can assist with the reduction of surface runoff pollution in highly urbanized communities. |
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https://www.hjkx.ac.cn/hjkx/ch/reader/create_pdf.aspx?file_no=20200824&flag=1&journal_id=hjkx&year_id=2020