九洲江流域水质变化趋势及污染来源分析  

Analysis on Water Quality Change Trend and Pollution Sources in Jiuzhou River Basin

作　　者：周良洁 徐荣乐 刘凯 宋晓薇 王旭 王明 唐朝武 ZHOU Liang-jie;XU Rong-e;LIU Kai;SONG Xiao-wei;WANG Xu;WANG Ming;TANG Chao-wu(Scientific Research Academy of Guangxi Enwvironmental Protection,Nanning,Guangxi Zhuang Autonomous Region,Nanning 530022,China)

机构地区：[1]广西壮族自治区环境保护科学研究院,南宁530022

出　　处：《四川环境》2025年第2期61-69,共9页Sichuan Environment

基　　金：广西重点研发计划(重点流域污染多维指纹精准溯源与防控技术研究及应用示范,桂科AB24010019);广西科技重大专项(面向东盟水污染防治技术及装备科技成果转移转化,桂科AA23073008);广西环科院科研创新基金资助(九洲江文车桥-山角段蓝藻爆发成因及对策研究,HKYCX-2022-5)。

摘　　要：为深入解析九洲江流域自开展上下游横向生态补偿工作以来水质的时间和空间变化趋势及污染主要来源,采用单因子评价法和改进的内梅罗污染指数法对九洲江流域水质进行评价,结合九洲江流域入河排污口排查结果及污染溯源结果分析污染成因,研究结果表明,年际变化趋势总体向好,但仍存在断面超标的情况。超标河段出现在上游,水质多为Ⅳ类~劣Ⅴ类,中下游水质多为Ⅲ类~Ⅳ类,75%干流断面和66.67%支流断面的污染季节集中在枯水期,流域主要超标物质为氮磷污染物,总体上呈现出枯水期氮磷污染浓度偏高的趋势;上中下游河段主要污染来源不同,上游主要源于城镇生活源,中游主要源于养殖源和农业面源,下游主要源于城镇和农村生活源,应根据不同区域的污染来源有针对性地提出控制措施,以保障九洲江流域水质持续提升。In order to deeply analyze the temporal and spatial variation trends of water quality and the main sources of pollution in the Jiuzhou River Basin since the implementation of the horizontal ecological compensation work in the upstream and downstream,the single factor evaluation method and the improved Nemerow pollution index method were used in this research to evaluate the water quality of the Jiuzhou River Basin,and the investigation results of the sewage outlets into the river in the JiuzhouRiver Basin and the pollution source tracing results were also taken into account to analyze the causes of pollution.The research results showed that the annual variation trend was generally good,but there were still over-limit sections.The over-limit sections were located in the upper reaches where the water quality was mostly Class IV to Class V,and the water quality in the middle and lower reaches was mostly Class II to Class IV.The pollution of 75%of main stream sections and 66.67%of tributary sections mainly occurred in the dry season.The main over-limit substances in the basin were nitrogen and phosphorus pollutants,and the overall trend of nitrogen and phosphorus pollution concentrations in the dry season was high.The main pollution sources of the upper,middle and lower reaches of the river were different.The pollution in the upper reaches was mainly from urban household wastes,the pollution in the middle reaches was mainly from aquaculture and agricultural non-point sources,and the pollution in the lower reaches was mainly from urban and rural household wastes.Targeted control measures should be proposed according to the pollution sources in different regions to ensure the continuous improvement of water quality in the Jiuzhou River Basin.

关 键 词：水质变化趋势 单因子评价法 改进的内梅罗污染指数法 污染来源 九洲江 

分 类 号：X522[环境科学与工程—环境工程]