巢湖及入湖河流氮素变化特征分析  

Analysis of Nitrogen Change Characteristics of Chao Lake and Its Inflow Rivers

作　　者：孙亚敏 王欢 唐萍 刘阳 SUN Ya-min;WANG Huan;TANG Ping;LIU Yang(Anhui Eco-environmental Monitoring Center,Hefei Anhui 230061,China)

机构地区：[1]安徽省生态环境监测中心,安徽合肥230061

出　　处：《环境科学导刊》2024年第5期52-57,共6页Environmental Science Survey

基　　金：中国环境科学研究院长江流域大数据挖掘决策与环境保护监管支持技术研发与集成应用项目巢湖水环境数字仿真研究课题(课题编号:2022-LHYJ-02-0602-04)。

摘　　要：基于安徽省地表水环境质量监测网监测数据,研究了2013—2022年巢湖主要入湖河流和湖体氮素变化特征。结果表明:10年来,主要入湖河流和湖体总氮年均值范围分别为2.93~6.52 mg/L、1.18~1.72mg/L,氨氮年均值范围分别为0.49~4.98mg/L、0.10~0.44mg/L,入湖河流总氮、氨氮浓度均远高于湖泊。入湖河流和湖体氮素呈现出较为相似的年际变化、季节变化和月度变化特征,总氮、氨氮浓度均冬、春季高,夏、秋季低。巢湖入湖河流新旧污染同时存在。对于Ⅴ类和劣Ⅴ类等污染严重的水体,氨氮占比较高;水质较好的水体,氨氮占比较低。Based on the monitoring data of the surface water environmental quality monitoring network of Anhui Province,the characteristics of nitrogen change of the main inflow rivers and Chao Lake were studied from 2013 to 2022.The results showed that over the past ten years,the annual average values of total nitrogen in major inflow rivers and lake body were 2.93~6.52 mg/L and 1.18~1.72 mg/L respectively,and the annual average values of ammonia nitrogen were 0.49~4.98 mg/L and 0.10~0.44 mg/L respectively.The concentrations of total nitrogen and ammonia nitrogen in the inflow rivers were much higher than those in the lake.The nitrogen in the rivers and lake bodies showed similar annual,seasonal and monthly variation characteristics.The concentrations of total nitrogen and ammonia nitrogen in the lake and the inflow rivers were higher in winter and spring,and lower in summer and fall.The new and old pollution existed simultaneously in the rivers flowing into Chao Lake.The percentage of ammonia nitrogen in heavily polluted water bodies with the fifth grade and worse than the fifth grade was high,however it was lower in water bodies with better water quality.

关 键 词：巢湖 入湖河流 总氮 氨氮 总氮与氨氮比值 变化特征 

分 类 号：X824[环境科学与工程—环境工程]