Fuzzy Synthetic Evaluation for Wetland Water Quality Appraisal in Poyang Lake, China

Traditional evaluation methods of the water quality parameters exist more deficiency. Entropy right process and fuzzy mathematics method are combined to establish an improved fuzzy synthetic evaluation method. Total phosphorus (TP), total nitrogen (TN) and index of permanganate (COD,) are selected as observed indicators in this paper. According to Mensal measured data of water quality at 5 points from 2008 and 2009 years, based on fuzzy synthetic evaluation method for water quality assessment analysed in Poyang lake. The assessment results showed that Water quality of measure stations in different water seasons changed to take turns: normal water season > flood season > dry season, the pollution's degree at town's stations was smaller than counties' stations, at which sample were affected greater by industry and agriculture, and we must pay attention to let contamination in counties.