城市生态系统健康评价方法及其应用研究

通过定性和定量分析建立了一套相对完整的评价指标体系,采用因子分析法赋予指标权重,应用模糊数学方法构建评价模型,并对重庆市城市生态系统健康状态进行了实例研究.结果表明,重庆生态系统健康在结构功能方面属于病态;可持续利用能力和动态变化方面属于亚健康状态,城市生态系统健康综合状况属于亚健康状态.以北京、天津、上海作为参比城市进行了对比评价,得出北京、天津和上海也均处于亚健康状态的结论;但4个城市生态系统整体健康状况排序为:上海、北京、天津、重庆.通过此评价,明确了重庆城市生态系统健康的状况及其影响因子,了解了重庆与其它3个直辖市的健康差距,为重庆城市生态规划与保护提供科学依据.

Study on evaluation method for urban ecosystem health and its application

The evaluation method of urban ecosystem health was emphatically discussed. By qualitative and quantitative analysis, a set of relatively integrated evaluation indexes system was brought forth. Moreove, factor analysis was employed to give indexes weight, and fuzzy mathematics was utilized to establish the evaluation model. Then the situation of urban ecosystem health in Chongqing was study as a case. The results indicated that in the structural function aspect, ecosystem health of Chongqing was situated in sick state, the ability of sustainable utilization and dynamic change were situated in sub-healthy state, and the comprehensive conditions of urban ecosystem health was situated in sub-healthy state. Subsequently, by contrastively evaluation with Beijing, Tianjin, Shanghai as the reference cities, it was concluded that these three cities were also situated in sub-healthy state. However, the integrated conditions of urban ecosystem health of these four cities followed as the sequence: Shanghai>Beijing>Tianjin>Chongqing. Consequently, the evaluation could made clear the condition and influencing factors of urban ecosystem health of Chongqing. The health gap between Chongqing and the other three municipalities was realized directly under the central government in China, which provided a scientific basis for programming and protecting of urban ecology of Chongqing.