江西科学2025，Vol.43Issue(6)：1023-1029,7.DOI:10.13990/j.issn1001-3679.2025.06.003
基于PCA和WQI指数的城市湖泊水质评价
Evaluation of Urban Lake Water Quality Based on PCA and WQI Index
摘要
Abstract
Based on the water quality monitoring data of 10 major urban lakes in Nanchang from 2020 to 2024,and combined with the PCA and WQI methods,a comprehensive evalua-tion of lake water quality was conducted.In this study,the lakes in Nanchang city were clas-sified into three categories through non-metric multidimensional scaling analysis(NMDS),and PCA was conducted respectively for different types of lakes to identify the main pollution factors.The results show that the main pollution factors of different types of lakes are dif-ferent.For example,the main influencing factors of the East,west,south and North lakes and the Qian Lake are organic matter and nutrient salts.For the other lakes,the main influ-encing factor is nutrient salts.Spatially,the WQI index of East Lake,South Lake,North Lake and Mei Lake was significantly higher than that of other lakes.In terms of time,the WQI index in 2021 and 2024 was significantly higher than that of other years.The WQI in-dex in November was higher than that of other months,and the overall water quality in summer was worse than other seasons.The PCA-WQI joint model can accurately and effi-ciently evaluate the water quality of urban lakes and provides important reference value for the protection and management of lakes in Nanchang city and similar cities.关键词
南昌市/城市湖泊/PCA-WQI联合模型/最小水质综合指数/水质评价Key words
Nanchang city/urban lakes/PCA-WQI combined model/WQImin comprehensive index/water quality evaluation分类
资源环境引用本文复制引用
ZHANG Yan,MIN Xiang,CHANG Jingjie,MAO Yan,SHEN Youheng,DENG Yueping..基于PCA和WQI指数的城市湖泊水质评价[J].江西科学,2025,43(6):1023-1029,7.基金项目
国家自然科学基金项目(42161022) （42161022）
江西省鄱阳湖流域生态水利科技创新中心项目(2023skls05). （2023skls05）
