基于层次分析法的洞庭湖生态安全评价.PDFVIP

中国环境科学 2010,30(Suppl.) ：41~45 China Environmental Science 基于层次分析法的洞庭湖生态安全评估 钟振宇 1,柴立元 1*,刘益贵 2,陈 灿 2 (1. 中南大学冶金科学与工程学院,湖南 长沙 410083 ；2.湖南省环境保护 科学研究院,湖南 长沙 410004) 摘要：采用“驱动力-压力-状态-影响-风险”模型,选取 14 项指标,构建洞庭湖生态安全评价指标体系.利用层次分析法确定各指标的权重, 运用生态安全度计算模型,对 2000,2005,2007 年洞庭湖生态安全状况进行分级评价.结果表明,与 20 世纪 80 年代相比,2000 年洞庭湖区评价 级别处于安全状态;2007 年处于一般状态,生态安全状态水平下降,状态得分值仅为基准年的 57.2%.对状态做进一步分析可知,TP 和 Chl.a 是造成洞庭湖水生态状况恶化的主要原因. 关键词：洞庭湖；生态安全；层次分析法；指标权重 中图分类号：X820.4 文献标识码：A 文章编号：1000-6923(2010)S0-0041-05 1 1 2 Ecological security evaluation based on AHP of Lake Dongting. ZHONG Zhen-yu , CHAI Li-yuan , LIU Yi-gui , 2 CHEN Can (1.School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China ； 2.Hunan Research Academy of Environment Sciences, Changsha 410004, China). China Environmental Science, 2010,30(Suppl.) ：41~45 Abstract ：An ecological security index (ESI) system of Lake Dongting was constructed with 14 indices, according to the driving force-pressure-state-impact-risk model. The weights of the indices were determined by analytical hierarchy process (AHP), and the ecological security status classification was evaluated by the ESI model for the years of 2000, 2005 and 2007. The ecological security was ranked as the safe grade in 2000 and the general grade in 2007, indicating a decrease in ecological security. In 2007, compared to the benchmark, the status score was only 57.2%. With further analysis, the TP and Chl.a were the main reason for the water deterioration of the Lake Dongting. Key words ：Lake Dongting ；ecological security ；analytical hierarchy process (AHP) ；index weight 20 世纪 80 年代以来,随着社会经济的迅猛 本研究以洞庭湖为研