In order to study the water quality status and change trend of Jieyang section of the main stream of Lianjiang River,the water quality monitoring data of two monitoring sections of the main stream of Lianjiang River for 11 consecutive years from 2012 to 2022 were selected for water quality evaluation and change trend analysis by using single factor pollution index method,Nemero environmental quality index method and Spearman rank correlation coefficient method.The results showed that in the recent 11 years,the main stream of Jieyang section of the Lianjiang River exceeding indicators included ammonia nitrogen,total phosphorus,permanganate index,chemical oxygen demand,five-day biochemical oxygen demand,most of the pollution indicators and comprehensive pollution index appeared declining trend,water quality pollution was greatly reduced,indicating that the significant progress has been made in the pollution control of the Lianjiang River.
pollution index methodSpearman rank correlation coefficient methodwater quality change trendLianjiang River
万方数据
