基于SWMM模型的不同气象条件下城市雨水径流污染特性分析

发布时间：2018-04-15 17:54

本文选题：气象条件 + SWMM模型　；参考：《中国农村水利水电》2017年11期

【摘要】：以南昌大学前湖校区为例,利用SWMM模型对其进行水质模拟。通过使用实测降雨数据对该模型进行参数率定,论证了该模型能够较真实地模拟出本地区降雨径流非点源污染的特性。在此基础上,通过SWMM模型设计了不同的重现期、雨峰系数、前期干旱天数等气象条件,以此来分析雨水径流中的TSS、CODcr、TN和TP等污染物浓度随降雨历时的变化过程。结果表明:随着重现期增大,污染物浓度峰值变大,峰值出现的时间提前;随着雨峰系数的增大,污染物浓度峰值变大,峰值出现的时间延后;在同一重现期和雨峰系数下,前期干旱天数会影响污染物的浓度峰值和前期浓度增长趋势,对峰值出现的时间没有影响。
[Abstract]:Taking Qianhu campus of Nanchang University as an example, SWMM model was used to simulate the water quality.By using the measured rainfall data to determine the parameters of the model, it is proved that the model can simulate the characteristics of non-point source pollution of rainfall runoff in this area.On the basis of this, different weather conditions such as recurrence period, rain peak coefficient and early drought days were designed by SWMM model to analyze the variation process of pollutant concentration such as TN and TP in Rain Water runoff with rainfall duration.The results show that with the increase of the recurrence period, the peak value of pollutant concentration becomes larger and the peak value appears earlier; with the increase of the rain peak coefficient, the peak value of pollutant concentration becomes larger, and the time of the peak value appears later; under the same recurrence period and the rain peak coefficient,The days of drought in the early stage will affect the peak concentration of pollutants and the increasing trend of the concentration in the early stage, but have no effect on the time when the peak appears.
【作者单位】：南昌大学建筑工程学院;
【基金】：江西省研究生创新专项资金项目(YC2015-S014) 南昌大学研究生创新专项资金项目(CX2017066)
【分类号】：TV121.1;X52

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