模糊综合评价模型在浔江梧州段渔业水质评价中的应用

Application of fuzzy synthetic evaluating model to the assessment of water quality of Xunjiang in Wuzhou Section

依据2004～2008年浔江梧州段的调查监测结果,根据断面污染因子的特点,选择5个指标（溶解氧、高锰酸盐指数、氨氮、总氮、总磷）作为评价因子,应用模糊（Fuzzy）综合评价模型对其水质状况进行综合评价,计算出各监测断面水质级别.结果表明：浔江梧州段的5项评价指标中,TN的权重较大,该水体中主要污染物为总氮：2个断面均在不同程度上出现了V类水质,水质属中度污染;部分时段的水质不符合〈地表水环境质量标准（GB3838-2002）〉中渔业水域的要求.

The five indicators（DO, CODMn, NH3-N, TN, TP） were chosen as evaluation factors according to the characteristic of pollution factors and the survey and monitoring results of Xunjiang in Wuzhou section in 2004-2008. Fuzzy comprehensive evaluation model was applied for comprehensive evaluation of water quality. The water levels of the monitoring section were calculated.The results showed that TN weight was larger than the others in five evaluation indicators of Xunjiang in Wuzhou section. The main pollutant of water body was TN. Grade V emerged in two sections in varying degrees. Grade V water quality belonged to moderate pollution. The water quality of part-time accorded with the fishery waters requirements of Surface Water Environmental Quality Standard （GB3838-2002）.