Analysis of Total Phosphorus Water Environmental Pollution in Dongting Lake
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.
万方数据
维普
