Application of Cluster Analysis and Factor Analysis on Assessment of Eutrophication in Tianjin Coastal Area
In order to identify the main environmental factor of eutrophication in Tianjin coastal area,cluster analysis and factor analysis were combined together to evaluate the water quality in Tianjin coastal area.Based on the analysis of the monitoring data of the southern part of Tianjin coastal area,the assessment of eutrophication was accomplished by using the statistical software SAS.Firstly,the ecological indexes were used to make cluster analysis,the cluster process showed that the 30 monitoring sites could be divided into 3 groups.Then factor analysis was applied on the indexes of water quality from three groups to identify the main factors leading to eutrophication and find out the influences,and contributions of pollution sources.