三峡库区高阳平湖水体富营养化主要驱动因子研究--基于主成分分析法

Main Driving Factors of Eutrophication of Gaoyang Lake in the Three Gorges Reservoir Area:Based on Principal Component Analysis

研究各种水质因子(水温、溶解氧、电导率、pH、营养盐等)对三峡库区支流水体富营养化的驱动效果,为库区支流水体富营养化的防控与治理提供科学依据。于2018年11月至2019年10月在三峡库区高阳平湖进行了12次样品采集,获取了水温、水体pH、营养盐、水体溶解氧等指标数据,利用主成分分析法研究三峡库区支流水体富营养化状况,并分析其主要驱动因子。结果表明:应用主成分分析法将7项水质指标转换提取为2种主成分,共解释了74.7%的结果;主成分综合得分分析表明高阳平湖水质情况具有十分明显的季节性;水体电导率变化对三峡支流水体富营养化程度具有较强的指示作用。

This paper studies the driving effects of various water quality factors(water temperature,dissolved oxygen,conductivity,pH,nutrients,etc.)on the eutrophication of tributary water in the Three Gorges Reservoir(TGR)area,and provides a scientific basis for the prevention,control and governance of tributary water in the reservoir area.12 sample collections were conducted in Gaoyang Lake in the TGR from November 2018 to October 2019,and index data such as water temperature,water pH,nutrients,and dis⁃solved oxygen in the water were obtained.Principal component analysis(PCA)was used to study the eutrophication status of tribu⁃taries and its main driving factors.The seven water quality indicators were converted and extracted into 2 principal components us⁃ing principal component analysis,which explained 74.7%of the results;the principal component comprehensive score analysis show that the water quality of Gaoyang Lake has obvious seasonality;The change of water conductivity has a strong indication of the degree of eutrophication in the tributaries of the TGR.