河长制下眉山金牛河水质变化研究及水污染防治建议

Research on Water Quality Change of Jinniu River in Meishan City under River Chief System and Suggestions on Water Pollution Control

以眉山市金牛河为研究对象,基于各监测断面采集的样品数据,分析其水质变化情况。研究选取了2016~2019年4个断面的水体,监测分析其中的氨氮、高锰酸盐指数、总磷3个指标。采用单因子评价法对比分析金牛河实行河长制前后的水质变化趋势。结果表明:实行河长制后,丹东断面水质从劣Ⅴ类提高到了Ⅱ类,东夹交界、夹青交界、金牛河口均由劣Ⅴ类提升到Ⅲ类,从作为判别金牛河治理达标率的总磷指数来看,金牛河各监测断面水质情况有了很大改善。根据数据分析结果,对进一步改善金牛河水质并完成河长制保护目标,提出了相应的水污染防治建议。

Taking Jinniu River in Meishan City as the research object,based on the data collected from each monitoring section,the water quality of Jinniu River was analyzed.Water quality of four sections from 2016 to 2019 were selected,three indicators including ammonia nitrogen,permanganate index and phosphorus were monitored and analyzed,the variation trend of water quality of Jinniu river before and after the implementation of River chief system was analyzed by single factor evaluation method.The results showed that after the implementation of River chief system,the water quality of Dandong section has been improved from level V to levelⅡ,and that of Dongjia,Jiaqing and river mouth has been upgraded from level V to levelⅢ.The water quality of each monitoring section of Jinniu river has been greatly improved through standard-reaching rate,which depends on total phosphorus index.According to the results of data analysis,the corresponding water pollution prevention and control suggestions were put forward to improve the water quality of Jinniu River and achieve the protection goal of river chief system.