福州市中心城区降雨径流污染特征研究

Characteristics of Rainfall Runoff Pollution in City Center Area of Fuzhou

通过对福州市不同功能区域降雨径流水质的现场监测,研究福州市中心城区的非点源污染特征.结果表明,福州市降雨径流中部分污染物的平均浓度超过了地表水环境质量标准中的Ⅴ类指标,尤其是CODcr.降雨初期,径流污染物浓度较高,并随着降雨历时的延长而逐渐下降并趋于稳定.不同功能区的污染物平均浓度变异较大,其中交通区和工业区相对其他区域污染较为严重.

The characteristics of urban non-point source pollution in Fuzhou were studied by site monitoring on rainfall runoff water quality of several sample regions.The results showed that the water quality of most Fuzhou surface rainfall runoff exceeded corresponding national standard indicators of Ⅴ class surface water,especially for CODcr.Often,the concentrations of pollutants in the early stage of a precipitation were relatively higher,and,by the extension of raining time,they would descend gradually,going down to some stabilization level.Different functional areas varied greatly in the average concentration of pollutants,for example,traffic zones and industrial zones,compared to other regions,were under more serious pollution.