西江水质变化趋势分析及水环境容量研究

Analysis of Xijiang river water quality and research on its water environmental capacity

根据封开江口、云浮六都水厂、高要三个监测断面的历年水质数据,采用单因子评价法对西江干流肇庆段的水质进行评价,并用spearman秩相关系数法分析1990～2002年西江水质的变化趋势.根据水质规划目标计算部分污染物的水环境容量,指出非点源污染源对西江的水质影响比较大,且西江水质已呈下降趋势.

The water quality of Zhaoqing section of main stream of Xijiang river is evaluated by the single factor assessment, and the water quality change trend of Xijiang river is analyzed by Spearman's order correlation coefficient, in the light of water quality data of three monitoring sections such as Fengkai jiangkou, Liudu water factory of Yunfu, and Gaoyao in recent years. The water environmental capacity of some pollutants is calculated according to the objectives of water quality. It is pointed out that the influence of nonpoint source pollution on the water quality of Xijiang river is heavy, and the water quality of Xijiang river already become a downward trend.