“十三五”期间长宁河翡翠峡断面水质变化情况及原因分析

Water Quality Change and Cause Analysis of Feicuixia Section of Changning River during the “13th Five-Year Plan” Period

主要目的是研究长宁河翡翠峡断面超标原因,运用GB 3838、相关系数法对翡翠峡断面水质进行评价以及分析变化原因。结果表明,2015~2018年翡翠峡断面水质不达标,超标原因为总磷长期超标,2019~2020年,总磷超标现象减少,水质转变为达标。总体上,“十三五”期间翡翠峡断面水质有变好的趋势。此外,总磷超标原因为季节性变化特性和周边污染源排放影响。得到宜宾市水污染治理经验为抓住重点污染源排放,关注河流季节性变化,从而为宜宾总磷污染防控提供了技术支撑和决策依据。

The main purpose of this paper is to study the reasons of the Changning River Feicuixia section exceeding the standard.GB3838 and correlation coefficient method were used to evaluate and analyze the water quality of Feicuixia section.The results showed that the water quality of the Feicuixia section did not meet the standard from 2015 to 2018,due to total phosphorus(TP).From 2019 to 2020,the excess of total phosphorus decreased,and then the water quality has reached the standard.In general,during the 13th Five-Year Plan period,the water quality of the Feicuixia section has become better.In addition,the cause of total phosphorus(TP)exceeding the standard of Feicuixia section was seasonal variation and the influence of surrounding pollution sources.This provides experience for the treatment of water pollution in Yibin,seizes the discharge of key pollution sources,pays attention to the seasonal changes of the river,and provides technical support and decision-making basis for the prevention and control of total phosphorus pollution in Yibin.