Analysis of the Variation Characteristics and Influencing Factors of Total Phosphorus Concentration in Nanhu Lake
WENG Ming
CHEN Qunfang
Abstract：After more than 20 years of continuous treatment,the water pollution control of Nanhu Lake has been continuous-ly deepened,and the main external pollution has been basically controlled,with significant improvement in water quality.But currently,Nanhu Lake is still at a moderate level of eutrophication and is prone to outbreaks of blue-green algae in summer.The overall trend of total phosphorus concentration in Nanhu is decreasing,with an average annual value decreasing from 0.370 mg/L in 2017 to 0.096 mg/L in 2024.The total phosphorus concentration shows significant seasonal fluctuations,with summer significantly higher than other seasons and reaching its highest value of the year in August.Through analysis,the pumping effect of algae growth and the release of phosphorus from sediments are the main reasons for the increase in total phosphorus concentration in Nanhu Lake during summer.
Keywords：Nanhutotal phosphorusspatiotemporal changesalgae growthrelease of sediment
Publication Date：2025-06-30
Online Publishing Date：2025-09-22(First online date of this platform, not the publication date of the document)
Pages：4( 124-127 )