洞庭湖总磷水环境污染分析  

Analysis of Total Phosphorus Water Environmental Pollution in Dongting Lake

作　　者：欧阳美凤 尹宇莹 高吉权 阳文娟 朱丹丹 OUYANG Meifeng;YIN Yuying;GAO Jiquan;YANG Wenjuan;ZHU Dandan(Eco-Environmental Monitoring Center of Dongting Lake of Hunan Province,Yueyang 414000,China;Changsha Eco-Environmental Monitoring Center of Hunan Province,Changsha 410000,China;Yueyang Eco-Environmental Monitoring Center of Hunan Province,Yueyang 414000,China)

机构地区：[1]湖南省洞庭湖生态环境监测中心,湖南岳阳414000 [2]湖南省长沙生态环境监测中心,湖南长沙410000 [3]湖南省岳阳生态环境监测中心,湖南岳阳414000

出　　处：《湖南理工学院学报（自然科学版）》2024年第3期64-70,共7页Journal of Hunan Institute of Science and Technology(Natural Sciences)

摘　　要：总磷已成为洞庭湖湖区主要污染物,为打赢洞庭湖总磷污染控制与削减攻坚战,以洞庭湖湖体、入湖河流以及出口的断面为对象,监测其2016年至2022年水质,进而探明洞庭湖流域总磷时空变化规律.结果表明,湖体总磷年均浓度呈先降后升再降趋势;按考核市州划分三个湖区,总磷年均浓度东洞庭湖(岳阳湖区)>西洞庭湖(常德湖区)>南洞庭湖(益阳湖区);湘江、资江、沅江、澧水四水入湖口处总磷年均浓度总体呈下降趋势,总体明显低于湖体浓度,建议重点防控湖区总磷农业面源污染.Total phosphorus has emerged as the primary pollutant in the Dongting Lake area.To address the challenge of controlling and reducing total phosphorus pollution,water quality monitoring was conducted from 2016 to 2022 for Dongting Lake itself,as well as the incoming rivers and outlet sections.The spatiotemporal variations of total phosphorus within the Dongting Lake basin was explored.The results indicate that the annual average concentration of total phosphorus in the lake exhibits a trend of initially decreasing,followed by an increase,and then decreasing again.The basin can be divided into three distinct areas based on administrative divisions,with the average annual concentration of total phosphorus ranking as follows:East Dongting Lake(Yueyang Lake District)>West Dongting Lake(Changde Lake District)>South Dongting Lake(Yiyang Lake District).Additionally,the annual average concentration of total phosphorus at the entrances of the“Four Rivers”-Xiangjiang,Zijiang,Yuanjiang,and Lishui-displays an overall downward trend that is significantly lower than that observed in the lake itself.It is recommended to prioritize the prevention and control of agricultural non-point source pollution of total phosphorus in this area.

关 键 词：洞庭湖 总磷 面源污染 

分 类 号：X524[环境科学与工程—环境工程]