摘要
为深入研究北方典型区域入海河流的氮污染问题,对2020—2024年山东省入海河流总氮时空变化情况进行分析。结果表明,总氮年度变化呈倒“U”型,2020—2022年逐步上升,2023—2024年逐步下降,表明总氮治理专项行动成效显著;总氮月度分布呈“U”型,夏季低、冬季高,与污水处理厂外排水总氮的变化趋势一致,反映出污水处理厂外排水对入海河流影响较大,同时农业面源污染在降水量的驱动下,也对入海河流的总氮浓度产生了相应影响;总氮空间分布为半岛地区高、平坦地区低,青岛市、烟台市、威海市总氮浓度较高,东营市、滨州市总氮浓度较低,总氮浓度高值区受种植结构和地质结构影响明显;总氮以硝酸盐氮为主要成分,其治理的突破口在于硝酸盐氮的有效削减。
To conduct an in-depth study on nitrogen pollution in inflow rivers in typical northern regions,the spatiotemporal variations of total nitrogen in inflow rivers in Shandong from 2020 to 2024 were analyzed.The results showed that the annual variation of total nitrogen was an inverted U shape,gradually increasing from 2020 to 2022 and gradually decreasing from 2023 to 2024,indicating significant effectiveness of the total nitrogen control special action.The monthly distribution of total nitrogen exhibited a U-shaped pattern,with low levels in summer and high levels in winter,which was consistent with the changing trend of total nitrogen in effluent from sewage treatment plants.This reflected that the effluent from sewage treatment plants had a significant impact on inflow rivers.Meanwhile,agricultural non-point source pollution,driven by precipitation,also affected total nitrogen concentration in inflow rivers.The spatial distribution of total nitrogen concentration was high in the peninsula region and low in the flat area.The average concentrations of TN in Qingdao,Yantai and Weihai were relatively high,while those in Dongying and Binzhou were relatively low.Areas with high total nitrogen concentration were significantly affected by planting structure and geological structure.Nitrate nitrogen was identified as the primary component of total nitrogen,and the key to its control lay in effectively reducing nitrate nitrogen.
作者
张慧
郭文建
曹方方
谭伟
岳太星
李彦
石敬华
ZHANG Hui;GUO Wenjian;CAO Fangfang;TAN Wei;YUE Taixing;LI Yan;SHI Jinghua(Shandong Provincial Eco-environment Monitoring Center,Jinan,Shandong 250014,China)
出处
《环境监测管理与技术》
北大核心
2026年第1期90-95,共6页
The Administration and Technique of Environmental Monitoring
基金
国家自然科学基金资助项目(41771524)
山东省自然科学基金资助项目(ZR2019MD030,ZR2020ZD21)。
关键词
总氮
时空分布特征
来源研究
污水处理厂
农业面源
入海河流
山东省
Total nitrogen
Spatiotemporal distribution characteristics
Source analysis
Sewage treatment plant
Agricultural non-point source
Rivers flowing into the sea
Shandong
