绛溪河流域简阳段水环境调查与特征分析

Investigation and Characteristic Analysis of Water Environment in Jianyang Section of Jiangxi River Basin

采用单因子评价法、水质类别比例法、平均综合污染指数法、SPSS统计和相关性分析方法,调查分析绛溪河简阳段水环境特征,提出污染防治建议。本次调查结果表明:(1)监测断面氨氮、总磷、化学需氧量达到Ⅲ类水质标准的比例分别为72.2%、11.1%、22.2%,污染最重的因子是总磷;(2)部分断面指标不能完全达标,从上游至下游水质变差;(3)支流海螺河、赤水河对干流污染贡献大;(4)平均综合污染指数与总磷的相关性高于氨氮、化学需氧量,河流污染受磷元素影响最为显著;(5)氨氮与总磷显著相关,河流氨氮、总磷同源性较好。

The single factor evaluation method, the water quality category ratio method, the average comprehensive pollution index method, the SPSS statistics and the correlation analysis method were used to investigate and analyze the water environment characteristics of the Jianyang section of the Tunxi River, and the pollution prevention suggestions were proposed. The results of this survey indicate that:(1) The proportions of ammonia nitrogen, total phosphorus and chemical oxygen demand in the monitoring section reaching Grade III water quality standards are 72.2%, 11.1%, and 22.2%, respectively. The most polluting factor is total phosphorus;(2) Some cross-section indicators can not fully meet the standard, and the water quality from upstream to downstream deteriorates.(3) The tributary Hailuo River and Chishui River contribute greatly to the mainstream pollution;(4) The correlation between the average comprehensive pollution index and total phosphorus is higher than that of ammonia nitrogen and chemical aerobics. The amount of river pollution is most affected by phosphorus;(5) ammonia nitrogen is significantly correlated with total phosphorus, and the river ammonia nitrogen and total phosphorus have good homology.