不同下垫面径流污染物冲刷规律研究

通过人工降雨模型研究玻璃面、水泥面和道路砖3种下垫面冲刷规律,利用得到的冲刷模型对下垫面径流污染物冲刷进行了模拟.结果表明:冲刷模型对污染物径流冲刷模拟效果较好,对溶解性污染物和非溶解性污染物模拟的相关系数均值在0.90和0.80以上,水泥面上模拟的误差标准差值分别为6.16和14.04.3种下垫面溶解性污染物的冲刷系数分别为0.332 mm-1、0.088 mm-1、0.173 mm-1,非溶解性污染物的冲刷系数分别为0.098 mm-1、0.062mm-1、0.261mm-1.污染物降雨径流呈现出明显的初始冲刷,对于水泥路面上,控制30％的径流量即可控制84％的溶解性和60％的非溶解性污染物的排放量.对不同下垫面径流冲刷规律的研究为城市雨水径流污染控制提供理论基础和技术支撑.

Study on Rainwater Pollutant Washoff Rate in Different Underlying Surface

The rainwater runoff was very important to urban water pollution.The flush of runoff pollutant in underlying surfaces was simulated by three flush models,obtained from artificial rainfall model,of glass,cement,and road brick.The results showed that flush models had good effect to pollutant runoff simulation.The correlation coefficient of soluble pollutant was above 0.90 and that of dissoluble pollutant was above 0.80.Simulation standard error of soluble pollutant on cement surface was 6.16 and to dissoluble pollutant,the simulation standard error was 14.04.The flush coefficients of soluble pollutant were 0.332 mm-1,0.088 mm-1,and 0.173 mm-1.Further,the flush coefficients of dissoluble pollutant were 0.098 mm-1,0.062 mm-1,and 0.261 mm-1.When rainwater began the initial flush,to cement surface,30% runoff would control 84% soluble pollutant and 60% dissoluble pollutant.The study on rainwater pollutant washoff rate on different underlying surfaces was expected to be useful development of theoretical basis and technical support for city rainwater runoff pollution control.