沱江流域石亭江支流广汉段水质调查与分析

Investigation and Analysis of the Water Quality of Guanghan Section of Shiting River in Tuojiang River Basin

依据广汉市2014年对沱江流域主要二级支流石亭江广汉段水环境枯水期、平水期、丰水期调查监测统计资料,采用单因子评价法分析与评价石亭江流域广汉段水质污染特征和现状。结果表明,沱江流域石亭江支流广汉段及其三级支流白鱼河所布设的背景断面、控制断面、削减断面中,所有断面总磷项目均存在严重超标现象,水质在Ⅳ~劣Ⅴ类范围,属于重度污染。该评价结果能为石亭江广汉段的水环境保护和科学治理提供依据。

According to the investigation and monitoring statistics of the dry season,normal river flow period and wet season in the year of 2014,using the single factor analysis evaluation method,this paper analyzed and assessed the characteristic and the current status of the pollution of the water quality in Guanghan area,which was in the Shiting River basin of the main second-level branch of the Tuojiang River. The results showed that the total phosphorus in all cross section have exceeded the standard,including background section,control section,reducing section in the Shiting River basin Guanghan section and the third level branch Baiyu River. The water quality is between IV-worse than V,which belongs to serious contamination. The evaluation results could provide basis for the water environmental protection and scientific management of this area.