鄱阳湖水体氮磷污染研究进展

综述了鄱阳湖水体营养盐的污染状况和发展趋势,结果表明:鄱阳湖总氮(TN)含量在20世纪90年代增速快,2000年后缓慢增长,总磷(TP)含量保持稳定,TN、TP含量呈枯水期>平水期>丰水期的特征; 湖区氮磷污染总体呈东部和南部污染重,西部和北部污染轻的特征; 入湖河道输入是鄱阳湖氮磷污染的主要来源,其中赣江贡献率最大,修河最小; 目前研究存在采样频率低、数据共享机制不健全、迁移转化机理研究少等问题.

The Review of Nitrogen and Phosphorus Pollution in Poyang Lake Water

The pollution status and development trend of nutrient in Poyang Lake water are reviewed.The results show that the concentration of total nitrogen(TN)in Poyang Lake increased rapidly in 1990s,while the increasing trend slowed down after the year 2000,The concentration of total phosphorus(TP)has no obvious trend.The seasonal variations of TN and TP content follow the trend:the dry season > the normal season > the wet season.The pollution is relatively heavy in the eastern and southern parts of the lake and relatively light in the western and northern part.River input is a major source of nitrogen and phosphorus loading to the lake,the maximal percentage is Ganjiang while the Xiuhe is the minimal.However,it should be noted that there are some limitations in the field sampling frequency,the data sharing mechanism and the migration and transformation mechanisms of nitrogen and phosphorus.