Analysis of spatial-temporal variation characteristics and influencing factors of water quality from Lingdingyang Bay
YE Sihua
ZHOU Minghao
Abstract：The water quality data of 27 survey points from Lingdingyang Bay in spring,summer and au-tumn of 2020 were selected,and the eutrophication index and principal component analysis were used to study the water environment quality of this sea area.The main driving factors affecting seawater quali-ty were discussed.The results showed that the water quality index and eutrophication index of Lingdin-gyang Bay showed significant seasonal and spatial differences.Principal component analysis was used to extract 4 principal components from 10 water quality indicators,which could explain 79.725％of the information.According to the comprehensive score of principal component analysis,from the time point of view,the water quality of Lingdingyang Bay was poor in spring,followed by summer and au-tumn.From the spatial point of view,the water quality near the mouth of the Pearl River was better than that far away from the mouth of the Pearl River,basically showing a trend of gradual improve-ment from north to south.The main driving factors affecting the sea area included SPM,pH,DO,COD,NH4-N,NO3-N,NO2-N and DIP.It is necessary to strengthen the control of industrial,agri-cultural and domestic sewage discharge in the Pearl River basin to improve the water environment quali-ty of the Lingdingyang Bay.
Keywords：Lingdingyang Baywater quality assessmenteutrophication indexprincipal component a-nalysis
Publication Date：2026-02-25
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：9( 43-51 )