广州市石井河流域初期雨水径流污染初步研究

摘要

选取广州石井河典型纯雨水排水口进行了不同降雨强度降雨的径流污染监测,分析了在典型小雨、典型中雨及典型大雨场次下排水口各水质指标随降雨历时的变化规律.研究结果表明,雨水口的COD浓度峰值一般不超过250mg/L,均值通常介于50 mg/L~100mg/L,雨水口水质随降雨过程的变化规律较为复杂,初始冲刷效应最明显的水质指标是SS和COD,NH3-N和TN初始冲刷效应不显著.%The 10fields rainfall have been monitored in Shijing river basin in Guangzhou, and the water quality index with the changing law of the rainfall have been analyzed in typical drain under light rain, moderate rain, heavy rain events respectively. The results show that the maximum of COD concentration is generally not more than 250mg/L, and the mean value is usually between 50 mg/L~100mg. The variation law of the water quality of the rain water outlet with the rainfall is complex, as the most obvious quality indexes of the first flush effect is SS and COD, while NH3-N and TN have no initial scouring effect.