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首页> 外文会议>Flood Forecasting and Water Resources Assessment for IAHS(International Association of Hydrological Sciences)-PUB >Water Quality Characteristics of Urban Surface Runoff in Beijing
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Water Quality Characteristics of Urban Surface Runoff in Beijing

机译：北京市城市地表径流水质特征

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Beijing is faced with dual pressure brought on by the shortage of water resources and water environment pollution, and thus, it is necessary to study the quality of the annual runoff in the city. In this paper, we investigated the water quality of runoff from different rain harvesting surfaces (i.e. roofs, streets and sunken-lawn) as potential sources to augment city supplies. Results indicate that the main contaminants in runoff are organic compounds and suspended solids. NH_3-N, Permanganate Index and volatile phenol of runoff from roofs were all beneath the criteria of Class V. The quality of runoff from sunken - lawns was quite good, except the content of NH_3-N was higher than the criterion of Class III. The COD from the road surface was more than 493. 5 ml/L at the initial stage of the runoff, and it deceased asymptotically to a lower level with increasing rainfall duration (i. e. time). In a conclusion, runoff from roofs can be used as city municipal and domestic water except during the initial stage of runoff, while runoff from road surfaces can not be reused directly.
机译：北京面临水资源短缺和水环境污染带来的双重压力，因此有必要研究北京市年径流量的质量。在本文中，我们调查了不同集雨面（即屋顶，街道和下沉式草坪）的径流水质，作为增加城市供水的潜在来源。结果表明，径流中的主要污染物是有机化合物和悬浮固体。屋顶径流中的NH_3-N，高锰酸盐指数和挥发性酚均在V级以下。沉没草坪的径流质量相当好，只是NH_3-N的含量高于III级。在径流初始阶段，来自路面的COD大于493. 5 ml / L，随着降雨持续时间（即时间）的增加，COD逐渐降低至较低水平。总之，屋顶的径流可以用作城市市政和生活用水，除非在径流的初期阶段，而路面的径流不能直接重复使用。

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