| 沪浙边界地区水体主要污染物浓度及通量时空变化特征分析 |
| Spatiotemporal Variation Characteristics of Major Pollutant Concentrations and Fluxes in the Shanghai-Zhejiang Provincial Boundary Waters |
| 投稿时间：2024-11-25 修订日期：2025-04-27 |
| DOI：10.19316/j.issn.1002-6002.2026.01.20 |
| 中文关键词: 沪浙边界 黄浦江上游 水体污染物 通量 时空变化 相关性 |
| 英文关键词:Shanghai-Zhejiang provincial boundary upstream of Huangpu River water pollutants flux spatiotemporal changes relevance |
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| 中文摘要: |
| 基于2022—2023年沪浙边界地区8个代表断面的水文水质自动监测数据,分析了主要污染物浓度、通量的时空变化特征及影响因素。结果表明,在空间上,污染物浓度呈北低南高分布态势,通量则是北高南低。点源和面源污染共同影响着区域水质,其中区域南部受点源污染影响更显著。年际间比对显示,相比2022年,2023年主要污染物浓度离散程度增大,表明点源污染加剧。相关性分析显示,净泄量对高锰酸盐指数(CODMn)和总磷(TP)通量变化起主导作用,而氨氮(NH3-N)和总氮(TN)通量受季节性施肥影响显著。时空聚类分析表明,冬春季(第一季度)的TN通量贡献突出,占比达35.67%。建议加强南部点源治理、北部面源截留及冬春季农田管理,通过生态沟渠等措施降低污染物入河风险。 |
| 英文摘要: |
| Based on hydrological and water quality automatic monitoring data from eight representative cross-sections in the Shanghai-Zhejiang boundary areas from 2022 to 2023,this study analyzed the spatiotemporal variation characteristics and influencing factors of major pollutant concentrations and fluxes.The results indicate that spatially,pollutant concentrations exhibit a distribution pattern of lower in the north and higher in the south,while fluxes show the opposite trend,with higher in the north and lower in the south.Both point source and non-point source pollution jointly affect regional water quality,with the southern area being more significantly impacted by point source pollution.Interannual comparisons reveal that compared to 2022,the dispersion degree of major pollutant concentrations increased in 2023,suggesting intensified point source pollution.Correlation analysis shows that net discharge plays a dominant role in the variation of permanganate index (CODMn) and total phosphorus (TP) fluxes,whereas ammonia nitrogen (NH3-N) and total nitrogen (TN) fluxes are significantly influenced by seasonal fertilization.Spatiotemporal cluster analysis indicates that TN fluxes in winter and spring (the first quarter) contribute prominently,accounting for 35.67% of the total.It is recommended to strengthen point source control in the south,enhance non-point source interception in the north,and improve farmland management during winter and spring to reduce the risk of pollutants entering rivers through measures such as ecological ditches. |
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