城区路面雨水径流水文水质特征试验研究

鉴于研究城区路面径流水文过程与污染物变化特征可为有效利用城市雨水、控制非点源污染等提供参考依据,采用污染物分析方法对新乡市2010年城区路面3场降雨—径流的水文、水质过程进行采样分析。试验结果表明,路面径流系数在0.78～0.82之间,径流曲线形态与降雨过程线类似,两者波动幅度相对较小;径流初期污染严重,后期COD、SS浓度分别小于203、458mg/L;各指标的标准差率呈SS>COD>DO>pH值的趋势,这与各自浓度变化过程的指向性一致;径流中COD与SS之间的相关性较好,而DO与其之间的相关性较差。

Research on Hydrology and Pollution Characteristics of Urban Pavement Runoff

Researching on hydrological process of urban pavement runoff and variation characteristics of pollutants can provide the basis for effectively utilizing urban rainfall and controlling non-point source pollution. The hydrology and water quality process of 3 rainfall events on urban pavement in Xinxiang city, 2010 is taken sample by using pollutant analysis method. The test results show that the runoff coefficient of pavement is in the range of 0.78 and 0.82; the shape of runoff curve is similar to the rainfall process with small fluctuation; the runoff pollution is serious in the early period, and in the later period the concentration of COD and SS are below 203 mg/L and 458 mg/L, respectively; the standard deviation rate of water quality indicator ranks in the order of SS, COD, DO, pH, which is consistent with the directivity of indicator concentration variation; COD has a high correlation with SS; the correlation between DO and pollutants is small.