摘要
Abstract
In order to explore and study the variation trend and correlation of pollutants in the urban upstream and downstream sections of the tidal river reach,based on the water quality monitoring data of 4 representative sections of the Pearl River reach in Guangzhou urban area from 2011 to 2021,Time process line,Mann-Kendall trend analysis,Pearson product moment correlation coefficient,Spearman rank correlation coefficient and Kendall rank correlation coefficient were used to analyze and study.The results show that ① NH3-N and TP are the two main pollutants in the Guangzhou urban reach of the Pearl River.② In terms of time distribution,the pollution of NH3-N and TP was serious before 2018,and has been significantly improved since 2018,which is consistent with the full implementation of the river length system in Guangdong.③ In terms of spatial distribution,the NH3-N and TP pollution of S1,S2 and S3 in the main urban area of Guangzhou is significantly more serious than that of S4 in the downstream of the main urban area.④ In the correlation of upstream and downstream sections,the changes of NH3-N and TP in S1,S2 and S3 tend to be basically the same,and the correlation is significant.关键词
珠江广州河段/氨氮/总磷/相关性分析Key words
Guangzhou reach of the Pearl River/ammonia nitrogen/total phosphorus/correlation analysis分类
资源环境
