中文摘要：

运用灰色理论,建立了鄱阳湖水质评价模型。采用熵值法确定污染物权重,合理地反映了各污染物所占比例,保证了评价结果的可靠性;利用灰色理论建立的评价模型,考虑到各污染物之间的灰色关联度,水质评价结果可靠。研究表明,鄱阳湖及“五河”来水水质情况总体呈中营养水平,修水和鄱阳湖湖体（蛤蟆石）水质较差,为Ⅳ类水,应对重点污染地区采取相应保护措施,防止水质进一步污染。

英文摘要：

The water quality evaluation model for Poyang Lake is established based on gray theory. In this study, the weight of pollutants is determined by entropy method, which can reasonably reflect the proportion of pollutants and ensure the reliability of evaluation results. The evaluation model is established based on gray theory after taking into account the gray correlation between pollutants, which can achieve reliable water quality evaluation results. The study results show that the water quality of Poyang Lake and the five inflow rivers are generally in middle nutrient level, the water quality of Xiushui River and Poyang Lake （toadstone） is poor with a water quality of Grade IV. So the corresponding protection measures should be taken for key polluted areas to prevent further water pollution.