S流域QL断面水质变化及主要污染物分析  

Analysis of Water Quality Change and Major Pollutants in QL Section of the S River Basin

作　　者：黄艳贞 HUANG Yan-zhen(Dongguan Ecological Environment Monitoring Station,Guangdong Dongguan 523000,China)

机构地区：[1]广东省东莞生态环境监测站,广东东莞523000

出　　处：《广州化工》2024年第17期73-75,共3页GuangZhou Chemical Industry

摘　　要：采用单因子评价法,对D市S流域QL断面2021-2023年TP、DO、COD_(Cr)、COD_(Mn)、NH_(3)-N、BOD_(5)等6项监测指标进行分析。结果表明:经过三年的流域综合整治,QL断面水质整体得到改善,特别是高锰酸盐指数含量大幅下降,Ⅱ类水质占比提高至75%,占比增长了约8倍,有机物含量较低,五日生化需氧量和化学需氧量除极个别月份为Ⅲ类水质外,其余均为Ⅰ类水质,氨氮总磷仍为该断面主要污染物,氨氮Ⅳ~Ⅴ类水质占比超过50%,是影响断面水质类别的一个关键指标,总磷水质变化不大,仍然长期处于Ⅳ~Ⅴ类水质。相关部门应在巩固前期流域治理行动成果的同时,多措并举降低流域氨氮总磷含量,以期进一步提升流域水质。Six monitoring indexes including TP,DO,COD_(Cr),COD_(Mn),NH_(3)-N and BOD_(5) from 2021 to 2023 were analyzed by single-factor evaluation method.The results showed that after three years of comprehensive improvement of river basin,QL section water quality was improved,especially permanganate index content fell sharply,class water quality increased to 75%,proportion increased about 8 times,the organic content was low,expect for a few months when five biochemical oxygen demand and chemical oxygen demand were clussified as classⅢwater quality,the rest were class I water quality,ammonia nitrogen total phosphorus was still the main pollutant in the section,the water quality of ammonia nitrogenⅣ~V accounted for more than 50%,which was a key index affecting the water quality evaluation of the section.The total phosphorus water quality did not change much,and it was still inⅣ~V water quality for a long time.Relevant departments should take multiple measures to reduce the total content of ammonia nitrogen and phosphorus in the river basin,in order to further improve the water quality of the river basin.

关 键 词：单因子评价法 污染物 水质 

分 类 号：X832[环境科学与工程—环境工程]