重庆市生态安全评价

以重庆市为例，基于压力-状态-响应概念模型，选用17个指标并运用模糊数学隶属度法分析了重庆市生态安全的动态变化以及重庆市2007年各区县生态安全状况。结果表明,重庆市1997年和2002年生态安全值分别为2.384和2.114，均处于不安全状态；2007年生态安全值为1.704，处于临界安全状态，其中较安全区（1.0≤B*＜1.5）有13个区县，主要分布在渝西，面积为1.414 2万km2，占总面积的17.16%；临界安全区（1.5≤B*＜2.0）有11个区县，主要分布在渝西北，面积为1.539 3万km2，占总面积的18.68%；不安全区（2.0≤B*＜2.5）有12个区县，主要分布在渝中、渝东北和渝东南，面积为3.952 3万km2，占总面积的47.96%；很不安全区（B*≥2.5）有4个区县，主要分布在渝东北和渝东南，面积为1.334 5万km2，占总面积的16.20%。

Evaluation on ecologic safety of Chongqing

With the development of economic construction,people have higher requirements to the living eco-environment.Taken Chongqing as the example,17 indicators are built based on the pressure-state-response conceptual model.Ecological security dynamic assessment and ecological safety spatial assessment in Chongqing are analyzed with the fuzzy membership degree method.The results show that the ecological security value in Chongqing is 2.384 and 2.114 in 1997 and 2002,belonging to insecurity state,and 1.704 in 2007,belonging to critically safe.The ecological security in Chongqing in 2007 distribute as foulw： there are 13 districts in more secure area（1.0≤B＊1.5） in west Chongqing,which attains 1.414 2×104 km2 and accounts for 17.16% of the total area;11 districts in critical security zone（1.5≤B＊2.0）in northwest Chongqing,which attains 1.539 3×104 km2 and accounts for 18.68% of the total area;there are 12 districts in unsafe areas in southeast and northeast as well as the middle areas of Chongqing,which attains 3.952 3×104 km2 and accounts for 47.96% of the total area;and that there are 4 districts in very unsafe area in northeast and southeast Chongqing,which attains 1.334 5×104 km2 and accounts for 16.20% of the total area.