摘要
基于2016—2021年曹娥江流域的水质和水文监测数据,研究了曹娥江水质时空分布特征和水环境质量状况,估算主要污染物入海通量并分析其污染来源。结果表明:2016—2021年期间,长诏水库出口、屠家埠、汤曹汇合口和曹娥江大闸闸前4个监测断面的高锰酸盐指数和化学需氧量在时间上呈现出丰水期(6、7月)质量浓度高而枯水期(1月)质量浓度低的现象,说明面源污染对河流水质影响显著;氨氮质量浓度呈枯水期高而丰水期低的特点,说明氨氮主要来源于点源;石油类污染物丰水期和枯水期质量浓度无明显变化,总氮质量浓度普遍较高;总磷质量浓度总体保持在较低水平且符合水质要求。各断面月均污染物入海通量大体上呈现丰水期高枯水期低的现象,入海污染物通量与流量变化趋势基本一致,一般流量越大,污染物入海通量越大,但也与污染物浓度有关。曹娥江流域内入海污染物主要来源于农村集中生活污水,应加强农村污水处理,减少污染物排放。
Based on the water quality and hydrological monitoring data of the Cao e River basin from 2016 to 2021,the temporal and spatial distribution characteristics of water quality and water environment quality of the Cao e River were studied,and the fluxes of major pollutants into the sea were estimated and their pollution sources were analyzed.The results show that from 2016 to 2021,the permanganate index and chemical oxygen demand of the four monitoring sections at the outlet of Changzhao Reservoir,Tujiabu,Tangcao Junction and the front of Cao e River Sluice were characterized by high mass concentration in wet season(June and July)and low mass concentration in dry season(January),indicating that non-point source pollution had a significant impact on river water quality;the quality concentration of ammonia nitrogen was high in dry season and low in wet season,indicating that ammonia nitrogen mainly came from point source.The mass concentration of petroleum pollutants had no obvious change rule in wet and dry seasons,the total nitrogen mass concentration was generally high,and the total phosphorus mass concentration was generally kept at a low level and meets the water quality requirements.The monthly average pollutant flux into the sea of each section generally presented a phenomenon of high in wet season and low in dry season.The trend of pollutant flux into the sea was basically consistent with that of flow.The larger the flow was,the greater the pollutant flux into the sea was,but it s also related to the pollutant concentration.The pollutants of wastewater,ammonia nitrogen,total nitrogen and total phosphorus into the sea mainly came from rural centralized domestic sewage.Rural sewage treatment should be strengthened to reduce pollutant emissions.
作者
程全国
张志敏
吕旭波
王艳
雷坤
CHENG Quanguo;ZHANG Zhimin;LYU Xubo;WANG Yan;LEI Kun(College of Environment,Shenyang University,Shenyang 110044,China;Institute of Water Ecology and Environment,Chinese Research Academy of Environmental Sciences,Beijing 100012,China)
出处
《沈阳大学学报（自然科学版）》
CAS
2022年第6期430-441,共12页
Journal of Shenyang University：Natural Science
基金
国家重点研发计划项目(2021YFC3101705)。
关键词
污染物
入海通量
水质特征
时空分布
污染来源
曹娥江流域
pollutant
flux to sea
characteristics of water quality
spatial and temporal distribution
pollution sources
Cao-E River
