WATER QUALITY ANALYSIS AND ASSESSMENT OF RIVERS IN JILIN PROVINCE OF CHINA

Key words: 
• principal component analysis /
• cluster analysis /
• water quality analysis /
• water quality assessment

Abstract: By means of principal component analysis, based on 6 principal components chosen of computer, cluster analysis of the river water quality in Jinn Province was made objectively. Based on chosen principal components, the river water quality in Jinn Province was evaluated by means of synthetic index method, fuzzy mathematical method, and grey correlation. Rivers in Jinn Province are POlluted differently. The rivers polluted most seriously make up 44.4%, the rivers polluted seriously make up 25.9%, and the rivers POlluted lightly make up 18.5%. Judging by synthetic pollution indexes of water quality,the first five rivers polluted seriously are the Yitong River, the East Liaohe River,the main branch of the Tumen River, and the Gaya River(tributary of the Tumen River).The rivers with good water quality are the Piaohe River, the Jiaohe River, the Buhatong River and the main branch of the Yalu River. The waters polluted comparatively seriously in Jinn Province are the sections of rivers passing through cities and towns. The main pollutants are organic compounds. And the main reason causing serious water pollution is the discharge of industrial and domestic wastewater.