摘要
基于走航和自动监测数据,利用主成分分析和聚类分析法,识别主导因子,解析污染成因,深入探索钱塘江兰江流域水质现状和时空分布特征,为实现绿色共富提供决策依据。2019-2021年,兰江流域主要污染因子为营养盐和好氧有机物,主要污染源为农业面源和生活源;水质基本稳定达标、稳中向好,存在明显的季节性变化,丰水期水质好于枯水期;空间上,水质由好到差顺序依次为衢江>兰江>金华江,各江段沿程污染物浓度变化不明显。建议强化流域协同,实施精准治水,着重抓好农业面源治理。
From 2019 to 2021,a research based on the data gathered by navigation monitoring and automatic monitoring and analyzed by Principal Component Analysis(PCA)and Cluster Analysis(CA)had investigated in Lanjiang River Basin to identify the main factors and trace the sources of pollutions.The research revealed some spatial-temporal characteristics of water quality in Lanjiang River Basin,and thereby supported the decision-making through the realization of Green and Common Prosperity with scientific evidence.From 2019 to 2021,the main pollution factors in the basin were nutrients and organics,whereas the dominating sources in the basin were agricultural non-point source pollution and domestic source pollution.In general,the water quality was not only constantly meeting the standard of class 3 water,but also displaying its improvement,while there is a seasonal fluctuation of water quality:the quality of water in flood period was better than that in dry period.The spatial analysis showed that the water quality of Jinhuajiang River basin was the worst,flowed by that of Lanjiang River,and water quality of Qujiang River was the best.There was no obvious change among the concentrations of pollutants in cross sections of each river.It is recommended to establish a methodology of full-basin-wide management of pollutions,to execute precise water control,to emphasize to regulate agricultural non-point source pollution.
作者
周志刚
张帆
江磊
许毅超
Zhou Zhigang;Zhang Fan;Jiang Lei;Xu Yichao(Lanxi Environmental Protection Monitoring Station,Lanxi Zhejiang 321100,China)
出处
《环境与发展》
2022年第8期90-97,108,共9页
Environment & Development
关键词
走航监测
水质
污染源
绿色共富
Navigation monitoring technology
Water quality
Pollution sources
Green and common prosperity
