摘要
基于2016—2021年温州市鳌江流域5个监测断面的逐月水质监测数据,选取氨氮(NH_(3)-N)、高锰酸盐指数(COD_(Mn))、总磷(TP)、5日生化需氧量(BOD_(5))、总氮(TN)、溶解氧(DO)6个水质指标,依据《地表水环境质量标准》(GB 3838—2002),从时空变化特征对鳌江流域进行水质污染分析,并计算了埭头、江口渡监测断面的2016—2019年逐月的污染物通量。结果表明:顺溪、埭头断面、江屿断面均满足在地表水(环境)功能区划中的水质标准,下游方岩渡、江口渡断面DO质量浓度低于标准值,未满足在地表水(环境)功能区划中的水质标准;鳌江流域5个断面COD_(Mn)质量浓度整体上均呈现出丰水期高,枯水期低的特征,DO质量浓度整体上均呈现出丰水期低,枯水期高的特征;污染物质量浓度年变化在沿程空间上整体呈现出下游断面较高的现象;流域内埭头、江口渡断面污染物整体呈现出丰水期月通量大于枯水期月通量的变化;鳌江流域污染物质量浓度与月径流量呈极显著正相关,以非点源污染为主。
Based on the monthly water quality monitoring data of five monitoring sections in Aojiang of Wenzhou City from 2016 to 2021,six water quality indicators including ammonia nitrogen(NH_(3)-N),permanganate index(COD_(Mn)),total phosphorus(TP),five-day biochemical oxygen demand(BOD_(5)),total nitrogen(TN)and dissolved oxygen(DO)were selected to analyze the water pollution in Aojiang River from the characteristics of temporal and spatial changes according to Environmental Quality Standards for Surface Water(GB 3838-2002),and the monthly pollutant flux of Daitou and Jiangkoudu monitoring sections from 2016 to 2019 was calculated.The results show that the Shunxi,Daitou and Jiangyu sections meet the water quality standards in the surface water(environment)function zoning,while the downstream Fangyandu and Jiangkoudu sections do not meet the water quality standards in the surface water(environment)function zoning,and DO is lower than the standard value.On the whole,the concentration of COD_(Mn) in Aojiang River basin is high in the wet season and low in the dry season,DO shows the characteristics of low concentration in wet season and high concentration in dry season;the annual variation of pollutant mass concentration in the space along the route shows phenomenon of high concentration of pollutants in downstream section;the pollutant fluxes at Daitou and Jiangkoudu cross sections in the basin as a whole show that the fluxes in the wet season are greater than those in the dry season;the mass concentration of pollutants has a very significant positive correlation with the monthly runoff,and Aojiang River basin is dominated by non-point source pollution.
作者
程全国
王嗣彤
雷坤
CHENG Quanguo;WANG Sitong;LEI Kun(School of Environment,Shenyang University,Shenyang 110044,China;Institute of Water Ecology and Environment,Chinese Academy of Environmental Sciences,Beijing 100012,China)
出处
《沈阳大学学报（自然科学版）》
CAS
2023年第1期7-15,共9页
Journal of Shenyang University：Natural Science
基金
国家重点研发计划资助项目(2021YFC3101705)。
关键词
鳌江流域
水质
时空变化
污染物通量
污染源
Aojiang River basin
water quality
temporal and spatial changes
pollutant flux
pollution source
