达渝跨界河流水质现状及污染特征分析  

Analysis of Water Quality Status and Pollution Characteristics of Dazhou andChongqing Transboundary River

作　　者：杜紫诚 潘远梅 张余 廖琪 Du Zicheng;Pan Yuanmei;Zhang Yu;Liao Qi(Ecological Environment Monitoring Center Station of Dazhou,Dazhou,Sichuan 635000,China;Dazhou Environmental Science Research Institute,Dazhou,Sichuan 635000,China)

机构地区：[1]四川省达州生态环境监测中心站,四川达州635000 [2]达州市环境科学研究院,四川达州635000

出　　处：《绿色科技》2022年第22期100-103,共4页Journal of Green Science and Technology

基　　金：达州市社科联“十四五”规划课题(编号:DZ21D34)。

摘　　要：参照地表水环境质量标准,采用单因子评价法,统计分析了2018~2021年间达州和重庆(达渝)交界11条跨界河流水质状况,结果发现:铜钵河、平滩河、石桥河、袁驿河水质类别波动较大,污染相对突出,总磷为跨界河流的共性污染指标;通过化学需氧量等主要污染指标超标频率分析发现,平滩河为污染最为突出的跨界河流,其主要污染指标间表现出极高的关联性,水质表现出复合性污染特征;同时平滩河对下游铜钵河的关联影响明显,是铜钵河的重要污染汇入河段;平滩河高锰酸盐指数、总磷表现出明显的季节性污染高发特征,总磷和氨氮的浓度在上半年明显高于下半年。Reference to the surface water environmental quality standards,the monadic evaluation method was used to statistically analyze the water quality of 11 transboundary rivers at the border of Dazhou and Chongqing(Dayu)from 2018 to 2021.It was found that the water quality of Tongbo river,Pingtan river,Shiqiao river and Yuanyi river fluctuated greatly and the pollution was relatively prominent.The total phosphorus was the common pollution index of transboundary rivers.By analyzing the exceedance frequency of major pollution indexes such as chemical oxygen demand,it is found that Pingtan river is the most prominent transboundary river with high correlation among its major pollution indexes,and its water quality shows the characteristics of complex pollution.At the same time,Pingtan river has obvious influence on the downstream Tongbo river,which is an important pollution inlet section of Tongbo river.The permanganate index and total phosphorus of Pingtan river showed obvious seasonal pollution characteristics,and the concentrations of total phosphorus and ammonia nitrogen in the first half of the year were significantly higher than those in the second half.

关 键 词：跨界河流 水质现状 污染特征 

分 类 号：X824[环境科学与工程—环境工程]