巢湖流域县河污染物来源特征分析

Characteristic Analysis of Pollutant Sources of Xian River in Chaohu Lake Basin

基于对巢湖流域县河小流域主要污染物来源构成和污染特征的分析,对污染物入河量进行了计算。结果表明,县河的COD_(Cr)、氨氮和总磷的入河总量分别为6 607.3、421.0和76.3 t/a,主要来源于城镇生活污染;总氮入河总量为753.6 t/a,主要来源于城镇生活污染和污水处理厂的尾水排放。同时,针对流域错综复杂的排水系统,将中塘河+苏家河片区的雨污分流改造工作纳入区域水环境治理的重点,为有效改善河流水环境质量提供了依据。

Based on analysis of the main pollutant source composition and pollution characteristics of the Xian River in the Chaohu Lake Basin,the total amount of pollutantsinto the river was calculated. The results showed that the total amount of chemical oxygen demand,ammonia nitrogen and total phosphorus entering the Xian River were 6 607.3,421.0 and 76.3 t/a respectively, mostly from urban life pollution. The total amount of total nitrogen entering the Xian River was 753.6 t/a, mostly from urban life pollution and effluent of wastewater treatment plants. In view of the complex characteristics of the drainage system in the region, reconstruction project of separation of rain and sewage for Zhongtang River and Sujia River is treated as the key work of water environment treatment. This provides a foundation for effectively improving water environmental quality in the small river basin.