双基质层绿化屋面的雨水水文水质特征分析

发布时间：2018-04-17 10:01

本文选题：绿化屋面 + 产流过程　；参考：《环境工程学报》2016年11期

【摘要】：绿化屋面作为低冲击开发的常用措施之一,能有效削减暴雨径流、延缓产流时间,从而缓减城市市政管网的压力。但绿色屋面暴雨径流的水质特征依然存在很多不确定性。在天津市气候条件下,通过搭建不同厚度的"双基质层"绿化屋面小试实验装置开展人工降雨实验,着重研究分析了不同降雨条件下,绿化屋面的产流过程以及绿化屋面暴雨径流中污染物的平均出水浓度与吸附基质层厚度、降雨强度的关系。结果表明,产流阶段的产流速度与降雨总量无关,只与降雨强度有关,径流累积量与降雨强度无关,与填料层厚度和降雨总量有关;污染物径流平均浓度与吸附基质层厚度、降雨强度有关;绿色屋顶能够有效降低雨水的COD和浊度,且对酸雨有较好的中和作用。
[Abstract]:As one of the common measures of low-impact development, greening roof can effectively reduce rainstorm runoff, delay the time of runoff production, and relieve the pressure of urban municipal pipe network.However, there is still a lot of uncertainty about the water quality characteristics of green roof rainstorm runoff.Under the climatic conditions of Tianjin, the artificial rainfall experiment was carried out by setting up a small scale experiment device of "double substrate" greening roof with different thickness, and focusing on the research and analysis of different rainfall conditions.The runoff production process of green roof and the relationship between the average concentration of pollutants in rainstorm runoff and the thickness of adsorbed matrix layer and rainfall intensity.The results showed that the runoff rate was not related to the total amount of rainfall, but only to the intensity of rainfall, the accumulation of runoff was not related to the intensity of rainfall, it was related to the thickness of packing layer and the total amount of rainfall, and the average concentration of pollutant runoff was related to the thickness of adsorbed matrix layer.The green roof can effectively reduce Rain Water's COD and turbidity and neutralize acid rain.
【作者单位】：天津大学环境科学与工程学院;四川省建筑设计研究院;
【基金】：国家水体污染控制与治理科技重大专项(2014ZX07203-009) 天津市科技创新专项资金(08FDZDSF03200)
【分类号】：X52

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