济南市雨水径流水文水质特性研究

Hydrological Characteristics of Urban Runoffs in Jinan

为研究城市下垫面径流的水文过程与污染物浓度变化特征，对济南市2007年4-10月的6场降雨进行路面和屋面水文、水质过程同步分析，结果表明，济南降雨屋面的径流系数在0.80-0.96之间；路面的径流系数在0.88-0.96之间；径流曲线的形态与降雨过程线类似，但波动幅度相对较小；济南市降雨径流初期污染严重，降雨后期氨氯浓度稳定在2-4mg／L，屋面径流的CODer、SS浓度分别维持在20mg／L和50mg／L以下，路面的CODer浓度维持在50mg／L左右，但SS浓度较大；雨水径流中的CODer与其他污染物之间的确定系数R^2均大于0.8，污染物间较小的相关斜率表明了各污染物间良好的线性相关关系。

The purpose of this study is identifying and characterizing the hydrological process of urban runoffs, as well as concentrating variation of pollutants in it. Samples were collected in 6 rainfall events in Jinan from Apr. 2007 to Oct. 2007. Hydrology and pollution of the rainfall-runoff process were analyzed on roofs and roads. Research results show that runoff coefficients of roofs are 0.80-0.96, while 0.88-0.96 of roads in Jinan. The shapes of hydrological curves of runoffs are similar to rainfall curves. The pollution of the early rainfall runoffs in Jinan is serious, the concentration of ammonia in the late rainfall at 2-4 mg/L, the COD, SS from the roof at the end of the runoff is kept the following in 20 mg/L and 50 mg/L, and the COD from the road surface is maintained at 50 mg/L. However, a larger concentration of SS, evident correlation （R^2〉0.8）are found between COD and other pollutants in the rainfall-runoffs, the smaller slope-related in the pollutants shows that there is a linear relationship between pollutants.