2016年-2021年泗河口水质变化分析与评价研究

Water Quality Variation Analysis and Evaluation on Si River Estuary from 2016 to 2021

采用水质综合污染指数法和Spearman秩相关系数法对泗河口2016年-2021年的水质状况和污染物进行趋势分析,通过各污染物的分担率确定研究断面水质污染特征。结果表明:在研究期间泗河口水质处于重度污染及以上污染状态,断面主要污染指标由总氮、氨氮和总磷转变为总氮、化学需氧量和高锰酸盐指数;秩相关分析检验显示总氮、氨氮、总磷、化学需氧量下降趋势显著,高锰酸盐指数指标呈不显著下降趋势;水质综合污染指数也呈显著下降趋势,研究期间污染程度降低,水质呈现显著好转趋势。

In this paper,the comprehensive pollution indexmethods and Spearman's rank correlation coefficient method are used to evaluate the water quality and the changing trends of the water pollutionof Si River estuary in 2016-2021.Also,the feature water pollution of the selected cross section in the river was determined through calculating the pollution share rate.The result indicates that the water of Si River estuary was in severe to serious pollution grade during the research period,and the main pollution indicators changed from total nitrogen,ammonia nitrogen and total phosphorus to total nitrogen,chemical oxygen demand and permanganate index.The Spearman's rank correlation coefficient test shows a significantdowntrend of the total nitrogen,ammonia nitrogen,total phosphorus and chemical oxygen,but not a significantdowntrend of permanganate index and the comprehensive pollution index of water quality also shows a significantdowntrend,thus the pollution level decreased and water quality sees an improved trend.