摘要：Research on the surface water quality of the Panjin of the Liao River Basin, analyze the current status of water pollution of the river and identify the pollution source were studied in this paper. In the study, the principal component analysis method was used to evaluate and analyze seven water quality in-dicators inchuding COD. BODs,TP. NH-N, and TN at nine sampling points in the Panjin of the Liao River. Research indicates that the use of principal component analysis to obtain two principal compo-nents can explain 84.35% of the total variance. The first principal component includes COD, BOD; and other organic pollutant indicators, and the second principal component is TN. The main sources of pol-lution are domestic sources, industrial sources and aquaculture. Downstream tributary of the Liao River Basin pollution is more serious, a tributary of the river should start to gradually solve the problem of surface water pollution in Liao River Panjin section.
关键词：Water quality evaluation;Liao River Basin;surface water;principal component analysis
