枯水期鄱阳湖水体富营养化状态评价

Study on the eutrophication status in Poyang lake during lower water period

通过对鄱阳湖水体氮、磷等营养盐的分析测定,采用综合营养状态指数水体富营养化评价法,对枯水期鄱阳湖水质进行了富营养化水平分析。研究结果显示,不论从单个指标,还是从综合营养状态指数进行评价,枯水期鄱阳湖的水质处于富营养化水平。与已有文献中的数据比较,近年鄱阳湖的水质没有明显恶化。根据不同采样地点的情况分析,判断其氮、磷等有机物主要来源于面源污染。

To evaluate the eutrophication of Poyang Lake during lower water level,nitrogen,phosphorus and other nutrient were analyzed in the current study.By using the comprehensive nutrition state index method,the eutrophication of Poyang Lake was assessed.The results indicated that the Poyang Lake was eutrophic during the low water level seasons,both from the individual indicators,or from nutrition state index.Compared with the monitoring data in past years,no significant deterioration was found on Poyang Lake water quality in recent years.According to the case analysis of different sampling points,TN to TP was significantly positively correlated to eutrophication of water body,and mainly came from non-point source pollution.