RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2006, Vol. 15 >> Issue (Sup1): 83-87.

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APPLICATION OF FUZZY MATHEMATICS IN WATER QUALITY ASSESSMENT

HAO Hanzhou,JIN Menggui,CAO Lijing,XIE Xianjun   

  • Received:1900-01-01 Revised:1900-01-01 Online:2006-12-20

Abstract:

The water quality is an important part of environment. One important thing of management environment is assessing water quality. The present situation of water in the Yangtze River is analyzed. Through using the Fuzzy synthetic assessment,this paper primarily evaluates water quality of the Yangtze River on the basis of monitoring water quality data (200401～200412) of five sections in the Yangtze River. The results indicate that water quality of the Yangtze River ranks among ClassⅡ. The change of water quality is gentle. In this period,synthesis water indexes of five sections are changed from 2.0 to 2.6. Indexes in Feb. and Aug. are the highest of all (2.6). Synthesis water indexes of five sections are below 3.0. The index of specific section (Chenglingji,Hunan Province) is the highest (2.6) and the main pollutant is CODMn. Indexes of Linshan,Jiangsu Province are the least (2.0).

Key words: the Yangtze River, water quality, Fuzzy comprehensive assessment

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