千岛湖水环境富营养化评价

依据千岛湖水质的实际监测资料，采用基于营养状态指数法的基础上，利用熵技术法确定综合评价指标中的权重分配，从而构建综合的评价模型，对其水体富营养化状态进行分析，结果表明，千岛湖水体2001—2005年富营状态处于贫营养和中营养之间，整体水质良好，全湖富营养化程度较稳定，营养状态变化处于相对低的风险状况之中。最后提出千岛湖流域水环境富营养化防治措施和建议，可以进一步降低污染物水平，保障其综合效益的发挥。

Water Environment Eutrophication Evaluation in Qiandao Lake

Based on the practical monitoring data of Qiandao lake, the paper estimated the status of the eutrophication by the Carlson trophic state index and entropy technology. The results indicated that the Qiandao lake was between oligotropher and mesotropher in 2001 to 2005 year, the water quality was in good condition in total 5 years, it was mesotropher and at a relatively low risk situation. Finally, suggestions of prevention of water environment in the Qiandao lake areas were put forward to reduce contamination level and ensure the integrative benefits of Qiandao lake.