基于熵权的巢湖水生态健康模糊综合评价

在对巢湖水生态状况深入调查研究的基础上，确立了湖泊生态系统健康评价指标体系，确定了各指标健康等级的阙值范围，建立了基于熵权的湖库水生态健康模糊综合评价模型。并选取1980年巢湖的水质和水生态数据作为本底值。运用熵权法对2000～2005年整个湖泊生态系统的健康状况进行了客观评价，结果表明2004—2005年巢湖水生态系统均处于较差健康状态。本方法的计算结果表明采用熵权综合健康指数法对其进行生态系统健康评价具有很好的可靠性和实用性。最后根据实际提出了湖库水生态安全综合管理对策。

Fuzzy Synthetic Assessment on Ecosystem Health of Chaohu Lake Water Based on Entropy Weight

Based on investigation of ecological situation in Chaohu Lake, the assessment index system for ecological health of the lake was set up. By giving threshold of healthy grade for every index, a fuzzy synthetic assessment model based on entropy weight for ecological health of lake water was established. Selecting water quality and ecological data of Chaohu Lake in 1980s as background values, the ecosystem health of the entire lake from 2000 to 2005 was assessed objectively by application of the model. The result showed that aquatic ecosystem in Chaohu Lake was in poor health state during 2004 ~ 2005. The calculation results by this method proved that the model was reliable and practically applicable. Finally, the ecological safety management measures for Chaohu Lake were put forward in accordance with the actual situation.