基于多级灰关联法的博斯腾湖水生态健康评价

采用生态系统健康结构和功能指标建立了由物理化学指标体系、生态指标体系2个二级指标体系组成的生态系统健康评价指标体系。将多级灰关联理论引入系统综合评价之中,采用多级灰关联评价方法和综合营养状态指数评价方法相结合,对博斯腾湖自2001年以来水生态健康变化情况进行了综合评价与分析。评价结果显示,自2001年以来博斯腾湖的生态系统健康状态总体情况为中等,自2007年以来生态系统健康综合指数呈一定的下降趋势,并找出了导致水环境恶化的主要原因。

Basing on the Gray Correlation Method of Ecological Health on Bosten Lake

Using the structure and function index of ecosystem health to establish ecosystem assessment index system which is consisted by physicochemical and ecological indexes system. Introduce the gray correlation method which is used to deal with generalized uncertain question to comprehensive evaluation. Combination of gray correlation and comprehensive trophic level index method assess and analyse the variation of water ecological health from 2001 in Bosten Lake. The results show that: the overall condition of ecosystem health is medium and the ecological health comprehensive index is decreasing from 2007. The main features that lead to water environment deterioration are also found.