摘要
经过20多年的持续治理,南湖水体污染治理不断深入,主要外源污染基本得到控制,水质改善效果显著。但目前南湖仍处于中度富营养化水平,夏季易暴发蓝藻。南湖总磷浓度总体呈下降趋势,年均值由2017年的0.370 mg/L下降至2024年的0.096 mg/L。总磷浓度呈现明显的季节性波动,夏季显著高于其他季节,8月达到年内最高值。通过分析,藻类生长的泵吸作用和沉积物的磷释放是导致南湖夏季总磷浓度升高的主要原因。
After more than 20 years of continuous treatment,the water pollution control of Nanhu Lake has been continuously 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.
作者
翁明
陈群芳
WENG Ming;CHEN Qunfang(Wuhan Hongshan District Ecological Environment Monitoring Station,Wuhan 430072,China)
出处
《环境科学与技术》
北大核心
2025年第S1期124-127,共4页
Environmental Science & Technology
关键词
南湖
总磷
时空变化
藻类生长
沉积物释放
Nanhu
total phosphorus
spatiotemporal changes
algae growth
release of sediment
