沱江内江城区段水质分析

Water Quality Analysis of Tuojiang River in the Urban Area of Neijiang

为了解大坝拦截后沱江内江城区段水质情况,采用相应的国家标准方法对沱江水体的氮、磷、COD、BOD等指标进行监测。结果显示,NH 4+-N、NO 3--N、NO 2--N、TP的平均浓度分别为0.94 mg/L、1.35 mg/L、0.01 mg/L、0.78 mg/L,其中TP含量超标率达289.5%,NO 3--N为氮素的主要存在形态,占58.7%。建议相关部门采取措施,调高工业废水、污水处理厂污水排放标准,深化污水处理,缓解沱江氮、磷污染。

In order to understand the water quality of Tuojiang River in Neijiang section after the dam has blocked, this study adopts appropriate national standard to monitor phosphorus, nitrogen, COD and BOD of Tuojiang River. Results show that the average concentrations of NH4 - N, NO3- - N, NO2- - N and TP are 0. 94 rag/L, 1.35 rag/L, 0. 01 mg/L, 0. 78 rag/L, respectively, among which TP exceeds by 289. 5% and NO3 - N is the major form of nitrogen（58.7% ）. It is suggested that the related authorities should take measures to improve the industrial waste water and sewage treatment plant effluent standards, deepen the sewage treatment, and reduce nitrogen and phosphorus pollutions in Tuojiang River.